CN105612015B - The joint method of metal powder injection molding body - Google Patents
The joint method of metal powder injection molding body Download PDFInfo
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- CN105612015B CN105612015B CN201480056174.8A CN201480056174A CN105612015B CN 105612015 B CN105612015 B CN 105612015B CN 201480056174 A CN201480056174 A CN 201480056174A CN 105612015 B CN105612015 B CN 105612015B
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- metal powder
- powder injection
- injection molding
- wax
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
- B22F7/064—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts using an intermediate powder layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
- F01D9/044—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators permanently, e.g. by welding, brazing, casting or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/04—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/34—Rotor-blade aggregates of unitary construction, e.g. formed of sheet laminae
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/22—Manufacture essentially without removing material by sintering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
- F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
- F05D2230/237—Brazing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
In the joint method of metal powder injection molding body, [1] make to be kneaded metal powder and bonding agent and carry out injection molding at least two metal powder injection moldings body respectively and mutually abut, [2] at the joint portion that above-mentioned at least two metal powder injection moldings body abuts, coating agent of the coating comprising nitrogen or chlorine, [3] it by degreasing or sintering, engages above-mentioned at least two metal powder injection moldings body at above-mentioned joint portion and makes metal product.According to above-mentioned joint method, the bond strength at above-mentioned joint portion can be made to improve.
Description
Technical field
The present invention relates to the joint method of metal powder injection molding body [method for jointing metal
Injection molded parts], more particularly, to multiple metal powder injection molding bodies are engaged and make made of metal
The joint method of the metal powder injection molding body of product.
Background technique
Metal powder injection molding method (MIM:Metal Injection Molding) is following method, by make by
Metal powder and bonding agent are kneaded and have carried out injection molding formed body (green body [green in a manner of with regulation shape
Part]) degreasing and sintering are carried out in a vacuum or in gaseous environment, to make the metal product that density is more than 95%.Make
The substance for being mixed with a large amount of resin or wax etc. is used for bonding agent.It is maintained by making a variety of bonding agent ingredients successively disperse
The shape of body.
, it is preferable to use the ingredient in metal will not be remained on for bonding agent.For example, generally will be below at 250 DEG C
Compare the wax of stearic acid readily volatilized under low temperature, solid wax, Brazil wax etc. and is easy to divide at 500 DEG C of temperature below
Polyethylene that solution is dispersed, polypropylene, polystyrene, EVA (ethylene vinyl acetate), EEA (ethylene-ethyl acrylate copolymer
Resin) etc. resin mixing and use.
However, as it is following it is disclosed in patent document 1, the configuration of the stator blade of turbo-compressor cricoid interior shield with
Between cricoid outer shield.In addition, stator blade is by the alloy of principal component of Ti or Ni by forming, and combination circumferentially divide it is multiple
Stator blade sector [stator blade sectors] and constitute.Under normal circumstances, stator blade sector is formed in the following way, respectively
Dividually production constitute the tyre of a part of outer shield, in composition a part of shield interior band and blade, and in blade
Soldering tyre and interior band.
In recent years, from H.D angle is proposed, having keeps blade thinner and blade face is made into complicated three-dimension curved surface
Trend, but in casting, the form accuracy of blade is difficult to ensure in plastic processing.Therefore, it proposes to use with regard to the manufacturing method of blade
The scheme of above-mentioned metal powder injection molding method.
Exist in the above-mentioned stator blade sector in addition between interior band with multiple blades and is difficult to through injection moulding (metal
One process of powder injection-molded method) and the case where formed.It is therefore proposed that be formed in has a blade between interior band in addition
Stator blade sector dividing body and multiple dividing bodies are engaged to form the scheme of stator blade sector.
Following patent documents 2 disclose the joint method of metal powder injection molding body, and its object is to inhibit engagement strong
The reduction of degree.In the joint method, using the metal powder being diluted with water with the metal powder identical type for constituting formed body
With paste made of water-soluble pasty mass [gelatinized soluble material].Firstly, above-mentioned paste is applied
The joint surface of formed body before spreading on sintering, formed body utilize paste and temporary joint each other.Later, the formed body of temporary joint
It is sintered, formed body is engaged each other by the metal powder that paste is included.In addition, being disclosed in following patent documents 2
The case where being sintered paste coating after joint surface after degreasing and paste coating is subjected to degreasing behind joint surface
And the case where sintering.
Existing technical literature
Patent document
Patent document 1: Japanese Laid-Open 2004-197622 bulletin
Patent document 2: Japanese Laid-Open 2010-236042 bulletin
Summary of the invention
For the paste documented by the above patent document 2, use using starchiness as the water-soluble pasty mass of raw material.It forms sediment
Powder is the macromolecule formed by carbon (C), hydrogen (H) and oxygen (O), is easy to decompose because of heat.In addition, in metal powder injection molding
In method, bonding agent is set to disperse to make formed body from the green body being made of metal powder and bonding agent, so the size of formed body
It is shunk from the size of green body.Here it is difficult to control the deformation on the joint surface because caused by shrinking.Therefore, if using heat point is easy
The paste (bonding agent) of solution is difficult to maintain then because paste decomposes quickly, disperses in degreasing process or sintering process
The joint surface of contraction is mutual to be adjacent to state.Therefore, inhibit the low effect of bond strength insufficient.
The purpose of the present invention is to provide the joint methods for the metal powder injection molding body that bond strength can be made to improve.
The present invention is characterized in that providing a kind of joint method of metal powder injection molding body, make to be kneaded metal powder respectively
It carries out injection molding at least two metal powder injection moldings body with bonding agent and mutually abuts, in above-mentioned at least two metal
The joint portion that powder injection-molded body is abutted applies the coating agent containing nitrogen or chlorine, by being coated at above-mentioned joint portion
The above-mentioned at least two metal powder injection moldings body of above-mentioned coating agent carries out degreasing or sintering, to make above-mentioned at least two metal
Powder injection-molded body engages at above-mentioned joint portion and makes metal product.
According to features described above, the decomposition rate of coating agent can be postponed by using the coating agent comprising nitrogen or chlorine,
When the degreasing of metal powder injection molding body or firing, being adjacent to for metal powder injection molding body can be maintained longerly at joint portion
State, so as to improve the bond strength at joint portion.
Here, it is preferred that being, above-mentioned bonding agent contains in the wax of predetermined temperature range volatilization and than above-mentioned predetermined temperature model
The resin that high temperature range is dispersed is enclosed, it is above-mentioned in above-mentioned at least two metal powder injection moldings body degreasing or when being sintered
At least part of coating agent is volatilized later than above-mentioned wax, is dispersed earlier than above-mentioned resin.
Additionally, it is preferred that being contact surface or all side of the above-mentioned coating agent coated in above-mentioned joint portion.
Additionally, it is preferred that being, in the state that the gap at above-mentioned joint portion is maintained at 0.1mm or less, to above-mentioned at least two
A metal powder injection molding body carries out degreasing or sintering.
Additionally, it is preferred that being, above-mentioned metal product is the blade for the band portion for having multiple blades and supporting above-mentioned multiple blades
Sector, above-mentioned at least two metal powder injection moldings body are the segmentation with the above-mentioned vane sector of single blade respectively
Body.
Moreover, it is preferred that be, on the back side in the face for being provided for erecting above-mentioned blade of above-mentioned band portion, be formed with towards with it is upper
State the reinforcing rib that the direction of the blade string intersection of blade extends.
Here, it is preferred that being, if by the extension side of the extending direction of the above-mentioned band portion on above-mentioned dividing body and above-mentioned reinforcing rib
To angle be set as θ, then angle, θ is greater than 0 °, and below the established angle of above-mentioned blade.
Alternatively, preferably, if by the extension side of the extending direction of the above-mentioned band portion on above-mentioned dividing body and above-mentioned reinforcing rib
To angle be set as θ, then 0 ° of θ≤12 ° <.
Detailed description of the invention
Fig. 1 is the flow chart of the joint method of the metal powder injection molding body of embodiment.
Fig. 2 is the perspective view of the metal product made using the joint method of above-mentioned metal powder injection molding body, Fig. 2
(a) indicate that first case, Fig. 2 (b) indicate that second case, Fig. 2 (c) indicate third example.
Fig. 3 (a) indicates that the perspective view of the metal powder injection molding body after injection moulding, Fig. 3 (b) are indicated coated with painting
The perspective view of the metal powder injection molding body of application.
Fig. 4 is to indicate that the coating method of coating agent illustrates cross-sectional view, and Fig. 4 (a) indicates that first case, Fig. 4 (b) indicate second
Example, Fig. 4 (c) indicate third example, and Fig. 4 (d) indicates the 4th.
Fig. 5 (a) is the main view of tyre, and Fig. 5 (b) is the figure for indicating the relationship of extension angle θ and stability S of reinforcing rib
Table.
Fig. 6 is the main view of the variation of tyre.
Fig. 7 is the explanatory diagram of the gap experiment method at joint portion, and Fig. 7 (a) is the side view for indicating gap adjustment state, figure
7 (b) be the side view for indicating engagement end state.
Specific embodiment
Hereinafter, being illustrated referring to embodiment of the attached drawing to the joint method of metal powder injection molding body.
In the joint method of the metal powder injection molding body of present embodiment, by will be to metal powder and bonding agent
Be kneaded and injection molding metal powder injection molding body 2 is engaged with each other and carries out degreasing [degreasing] (unsticking
[debinding]) or sintering [sintering] (firing [calcining]), to make metal product 1.Here, in metal powder
After coating agent 4 of the coating of joint portion 3 comprising nitrogen (N) or chlorine (Cl) of last injection molded article 2, metal powder injection molding body 2
Carry out degreasing or sintering with being engaged with each other.
Specifically, as shown in Figure 1, making metal product 1 by following process: being mixed to metal powder and bonding agent
The compounding procedure S1 of refining；The raw material heating of mixing is dissolved and is injected to the injection moulding process S2 in metal die；It will be from gold
Belong to the metal powder injection molding body 2 that mold takes out to be combined with each other and in the coating work of the coating coating agent 4 such as soldering iron of joint portion 3
Sequence S3；It is coated with the degreasing process S4 of the heating furnace degreasing of metal powder injection molding body 2 of coating agent 4；And it will take off
The sintering process S5 that the metal powder injection molding body 2 of rouge is sintered with heating furnace.
Metal product 1 is, for example, a part of the stator blade unit of turbo-compressor.Stator blade unit is by cricoid interior shield, ring
The multiple stator blades of the outer shield and configuration of shape between them are constituted.Stator blade unit is divided by combination in the circumferential
Multiple stator blade sector makes.Above-mentioned metal product 1 is stator blade sector.
Metal product 1 shown in Fig. 2 (a) (stator blade sector) by the tyre 11 of a part as outer shield, as interior shield
The interior band 12 of a part of cover and the multiple stator blades 13 being configured between tyre 11 and interior band 12 are constituted.In addition, in Fig. 2 (a)
Chain-dotted line indicate joint portion 3.
11 have the guard section 11a for the peripheral side pipes' analysis for forming stator blade 13 and are respectively formed in guard section 11a's in addition
The hook portion 11b of two ora terminalis.It is formed with ladder 11d between hook portion 11b and guard section 11a, ladder 11d is engaging in being formed in
The track of turbine case.At the back side (face relative to pipes' analysis opposite side) in 11 face for being provided for erecting stator blade 13 in addition, lead to
It crosses guard section 11a and hook portion 11b is formed with recess portion.In recess portion, the reinforcing rib 11c for linking a pair of of hook portion 11b is formed
On guard section 11a.
Interior band 12 has the guard section 12a for the inner circumferential side pipes' analysis for forming stator blade 13 and is respectively formed at guard section 12a's
The groove portion 12b of two axial ora terminalis.Groove portion 12b is turned back by the lateral margin of guard section 12a and is formed.By a pair of of groove portion 12b it
Between insert plate accessory link the inner circumferential ends of multiple stator blade sectors, ring is maintained as by the interior band 12 that multiple guard section 12a are formed
Shape.The change that above-mentioned reinforcing rib 11c was reinforced and inhibited the tyre 11 in degreasing process S4, sintering process S5 in addition 11
Shape.The effect of reinforcing rib 11c is described later.
Metal product 1 is not limited to above-mentioned structure.As shown in Fig. 2 (b), metal product 1 is also possible to not have and add
The stator blade sector of strengthening tendons 11c.In addition, metal product 1 can also be the movable vane unit as turbo-compressor as shown in Fig. 2 (c)
A part movable vane sector.Metal product 1 as movable vane sector is by constituting the tyre 11 of a part of outer shield and combining
Multiple movable vanes 14 in addition 11 are constituted.In addition, the chain-dotted line in Fig. 2 (b) and Fig. 2 (c) indicates joint portion 3.
In addition, metal product 1 is not limited to stator blade sector, movable vane sector, it include by multiple metal powder injection moldings
All accessories of the engagement of body 2 and production.In addition, the structure of above-mentioned tyre 11, interior band 12 is an example, it is not limited to
The shape stated.
Above-mentioned metal product 1 has a complex shape, and exists and is difficult to maintain form accuracy and is formed by one injection
Come the case where production.In addition, increasing there are weight and being generated in degreasing or sintering in the case where 1 enlargement of metal product
The case where deformation.Therefore, in the present embodiment, as shown in Fig. 3 (a), by by multiple 2 (leaves of metal powder injection molding body
The dividing body of piece sector) engagement, to make such metal product 1 shown in Fig. 2 (a).Each metal powder injection molding body 2 has
In addition 11 and interior band 12 between with single stator blade 13 fairly simple shape, so be able to maintain that form accuracy and
It is made with one injection molding.
The metal product 1 that multiple metal powder injection molding bodies 2 are engaged and made is that have multiple blades (stator blade 13)
With the vane sector (for example, stator blade sector) of the band portion (tyre 11 and interior band 12) of support blade.Metal powder injection molding
Body 2 is the component for dividing vane sector by blade.Therefore, even if metal product 1 has a complex shape, metal powder injection
Formed body 2, which becomes, is easy injection molding shape, is able to maintain that form accuracy.In addition, in the following description, to metal powder
Injection molded article 2 is also using symbol identical with each section of metal product 1 (tyre 11, interior band 12, stator blade 13 etc.).
The each process of the flow chart of Fig. 1 is illustrated.In compounding procedure S1, become metal powder injection molding body 2
Raw material metal powder and bonding agent granulated by mixing.As metal powder, using for example by stainless steel (SUS), titanium,
Various alloys, various ceramics etc. are made into 10~20 μm of partial size or so of powder.
In addition, the resin that bonding agent is included in the wax of predetermined temperature range volatilization and disperses in the temperature range higher than wax.
Wax is, for example, stearic acid, paraffin, the Brazil wax etc. for being easy to volatilize in 250 DEG C of relatively low temperature below.In addition, resin is for example
Be 500 DEG C of temperature below be easy decompose disperse polyethylene, polypropylene, polystyrene, EVA (ethylene vinyl acetate),
(they can also be used in mixed way) such as EEA (ethylene-ethyl acrylate copolymer resin).In addition, except addition wax in bonding agent
And except resin, add lubricant, surfactant as needed etc..
In injection moulding process S2, metal powder injection molding body 2 shown in Fig. 3 (a) is formed.Metal powder injection at
Type body 2 is also referred to as green body.Also contain except the metal powder for constituting metal product 1 in metal powder injection molding body 2
Bonding agent, so the size of metal powder injection molding body 2 is bigger than metal product 1.
In working procedure of coating S3, as shown in Fig. 3 (b), multiple metal powder injection molding bodies 2 are to become metal product 1
The mode of shape is assembled, and applies coating agent 4 at joint portion 3.Coating agent 4 e.g. nitrogenous (N), the wax of chlorine (Cl) or tree
Rouge.In addition, at least part of coating agent 4 includes the material to disperse later in degreasing or sintering than wax contained by bonding agent
Material, the material to disperse earlier in degreasing or sintering than resin contained by bonding agent.Here, " at least one of coating agent 4
Point " refer to, a part of ingredient contained by coating agent 4 is dispersed later than wax contained by bonding agent, or than contained by bonding agent
Resin disperses earlier.
Specifically, it as coating agent 4, is able to use with polyurethane (- NHCOO-), amide groups (- CONH2)
Wax, chlorinated wax etc., the hot melt adhesive bonding agent with polyurethane.It is Hitachi Hi-bon [Hi-Bon] (registrar as commodity
Mark: Hitachi be melted into Polymer Company [Hitachi Kasei Polymer Co., Ltd.]), Henkel hot melt adhesive [Macromelt]
(registered trademark: aginomoto is fine for (registered trademark: Henkel Corp. [Henkel AG&Co.KGaA]) and chlorinated wax [EMPARA]
Chemical company [Ajinomoto Fine-Techno Co., Inc.]) etc..
If if the earlier stage coating agent 4 in aftermentioned degreasing process S4, sintering process S5 disperses, in metal powder
The joint portion 3 of last injection molded article 2 generates gap, the strength reduction of sintered metal product 1.But present embodiment
Coating agent 4 is the wax or resin of the material i.e. nitrogen (N) and/or chlorine (Cl) that decompose comprising being difficult to Yin Re, so will not be de-
Rouge process S4, sintering process S5 earlier stage disperse.In addition, coating agent 4 can also be by nitrogenous (N) and/or chlorine (Cl)
The resin of wax and nitrogenous (N) and/or chlorine (Cl) mix.
By using above-mentioned coating agent 4, at least part of coating agent 4 can be made to compare bonding agent in degreasing or sintering
Contained wax disperses later, or disperses earlier in degreasing or sintering than resin contained by bonding agent.Coating agent 4 include than
The material that the wax of the bonding agent of degreasing disperses later, so dispersing for the coating agent 4 being able to suppress in degreasing process S4, it can
Bonding (temporary joint) function of coating agent 4 is maintained for a long time.
In addition, coating agent 4 include dispersed earlier when degreasing or sintering than resin contained by bonding agent material (that is,
Before and after an at least resin for not remaining bonding agent for coating agent 4 disperses), so coating agent 4 will not block up in sintering process S5
The path of dispersing for filling in the resin of bonding agent, can integrally balancedly be sintered metal powder.As a result, it is possible to inhibit gold
The deformation of metal products 1.(in addition, " deformation " mentioned herein does not include because of caused by sintering from metal powder injection molding body 2
Contraction to metal product 1.) in addition, metal powder injection molding body 2 (also referred to as brown body) after degreasing process S4 connects
Conjunction portion 3 is maintained as being adjacent to state, so the intensity of sintered metal product 1 can be made to improve.
Above-mentioned coating agent 4 in the state that heating dissolves, using soldering iron [soldering iron], bristle [brush],
Roller [roller], blowing [spraying], dipping [immersion coating] etc. are coated on joint portion 3.For example, using
In the case where soldering iron, the coating agent 4 using 330 DEG C of softening points below of temperature with soldering iron is used.Coating agent 4 is applied to
Contact surface [contact surfaces] 3a or week side [circumferential side surface] 3b at joint portion 3.
In the first case shown in Fig. 4 (a), coating agent 4 is applied in contact surface 3a.Coating agent 4 is coated in contact surface 3a
In the case where, the bonding force (engaging force) at joint portion 3 can be made to improve.However, the gap g at joint portion 3 is preferably retained in
0.1mm or less.If gap g becomes larger, the strength reduction at the joint portion 3 as metal product 1, metal product 1 deform main
Reason.
In the second case shown in Fig. 4 (b), coating agent 4 is applied in contact surface 3a and week side 3b.Contact surface 3a is gold
Belong to the opposed faces on the joint portion 3 of powder injection-molded body 2, all side 3b are on the joint portion 3 of metal powder injection molding body 2
Side.In addition to contact surface 3a, by being also coated with coating agent 4 in all side 3b, the coating amount to contact surface 3a can reduce,
It can be easy to adjust gap g to 0.1mm or less.In addition, can make to be bonded the increase of (engagement) area, so joint portion can be made
3 bonding force (engagement) improves.
In the third example shown in Fig. 4 (c), coating agent 4 is applied in all side 3b.Herein, coating agent 4 is coated on joint portion
The complete cycle of 3 all side 3b.By only all side 3b apply coating agent 4, so as to easily by gap g adjust to
0.1mm or less.In addition, the coating agent 4 coated on week side 3b is heated in degreasing process S4 or sintering process S5 and dissolves, from
It so is impregnated with to contact surface 3a.Therefore, gap g can be maintained desired value hereinafter, and making joint portion 3 by contact surface 3a
Bonding force (engaging force) improve.
Shown in Fig. 4 (d) in the 4th, in a part coating coating agent 4 of all side 3b.Have at joint portion 3 multiple
In the case where miscellaneous shape, coating agent 4 only can also be applied in the position for being easy coating.In addition, being contacted as shown in Fig. 4 (d)
In the case where extending in vertical direction, the coating agent 4 of all side 3b coated on top is impregnated with because of gravity to contact face 3a
Face 3a.
As shown in Fig. 3 (b), the metal powder injection molding body 2 coated with coating agent 4 is positioned in supporting block 5 and is sent
Give degreasing process S4.Here, by keeping the height h of 11 ladder 11d in addition consistent with the height h of ora terminalis of interior band 12, thus
Stator blade 13 can horizontally be loaded in the state that ladder 11d to be connected to the corner of supporting block 5.
In addition, in the case where above-mentioned height h is inconsistent, if making in addition 11 ladder 11d be connected to supporting block 5
Make stator blade 13 horizontal in the state of corner, then including existing between the ora terminalis and supporting block 5 of band 12 the case where generation gap.At this
In the case where sample, the auxiliary support block (not shown) in filling gap can also be inserted between the ora terminalis and supporting block 5 of band 12 inside.
Alternatively, there is in addition 11 ladder if keeping stator blade 13 horizontal in the state that the ora terminalis and supporting block 5 for making interior band 12 contact
The case where gap is generated between 11d and the corner of supporting block 5.It in this case, can also be in ladder 11d and supporting block 5
The auxiliary support block (not shown) in insertion filling gap between (corner).
In degreasing process S4 and sintering process S5, bonding agent is removed, so sintered metal product 1 is big
It is small, compared to metal powder injection molding body 2 size and integrally shrink.Therefore, can by advance by stator blade 13 horizontally
Mounting is shrink stator blade 13 substantially horizontally.As a result, it is possible to keep glued metal powder injection molding body 2 integrally equal
Weighing apparatus is shunk, and is able to suppress deformation caused by deformation when contraction.
In degreasing process S4, wax contained by bonding agent is removed.Heating temperature in degreasing process S4 is generally than sintering
The heating temperature of process S5 is low.Accordingly it is also possible to by the degreasing plant different from sintering furnace used in sintering process S5 come pair
Metal powder injection molding body 2 is heated.It is of course also possible to pass through the temperature of sintering furnace used in control sintering process S5
Degree carries out degreasing to metal powder injection molding body 2.
In sintering process S5, resin contained by bonding agent is removed, and metal powder is sintered.For example, being closed by Ni base
IN718 [the IN: inconel [Inconel] (registered trademark: specialty metal company [Special Metals of gold
Corporation])] carry out use as metal powder in the case where, be preferably sintered under the non-oxidizing atmosphere more than 1200 DEG C.
For sintered metal product 1, as post-processing, both can in order to the carry out situation of sintering confirmation and measure density,
Can in order to size micro-adjustment and carry out punch process, electro-discharge machining can also be carried out for end face processing, can also be
Adjustment surface roughness and implement grinding or milled processed.
Above-mentioned reinforcing rib 11c (referring to Fig. 2 (a), Fig. 3 (a) and Fig. 3 (b) reference) is illustrated.Such as Fig. 5 (a) institute
Show, being extended at the back side of 11 (band portions) in addition has reinforcing rib 11c.The extending direction Lr of reinforcing rib 11c and the leaf of stator blade 13
Piece string [chord line] Lc intersects.If making the extending direction Le (the case where Fig. 5 (a) vertical direction) relative in addition 11
Reinforcing rib 11c angle be θ (> 0: the size of angle), the width of the tyre 11 of metal powder injection molding body 2 be A, its
Height is B, then the stability S (dB: decibel) of metal powder injection molding body 2 (metal product 1) can be by S=10log10
(B/A) it acquires.
It is separately formed the metal powder injection molding body 2 that the above-mentioned angle, θ of reinforcing rib 11c is 0 °, 6 ° and 12 °, to burning
The shape of tyre 11 after knot carries out three-dimensional measurement, and the ideal 2 (made of metal of metal powder injection molding body with uniform shrinkage
Product 1) shape be compared.Fig. 5 (b) indicates comparison result.If stability S higher, infused with the metal powder of uniform shrinkage
The size difference for penetrating formed body 2 is smaller.On the contrary, if stability S is lower, with the metal powder injection molding body 2 of uniform shrinkage
Size difference is larger.
As shown in Fig. 5 (b), θ=0 ° is compared, θ=6 ° or 12 ° of stability S are higher.Therefore, reinforcing rib 11c preferably increases
Above-mentioned angle, θ (that is, increasing the angle of the crossing relative to blade string Lc).However, even if in the case where θ=0 °, because of metal
The conditions such as size, shape, the weight of powder injection-molded body 2 can also obtain stability S and up to be able to maintain that metal product 1
Form accuracy the case where.Therefore, there is no need to will be except the case where above-mentioned angle, θ=0 °.
In addition, if the angle, θ of reinforcing rib 11c is excessive, when in the presence of promoting the sintering generated by the self weight of reinforcing rib 11c
Deformation hidden danger.It is therefore preferable that setting the upper limit to above-mentioned angle, θ.If above-mentioned situation is considered, preferably by above-mentioned angle, θ
The upper limit be selected as established angle [stagger angle] λ (> 0: the size of angle) of stator blade 13." established angle λ " refers to such as Fig. 5
(a) angle shown in relative to the blade string Lc of turbine axis direction La (the case where Fig. 5 (a) is parallel with above-mentioned extending direction Le)
Degree.Specifically, the upper limit of above-mentioned angle, θ is based on above-mentioned test result, the value being preferably selected as in the range of 6 °~12 °.So
And the upper limit of above-mentioned angle, θ is not limited to the value (range), it, can be according to each metal powder according to the self weight of reinforcing rib 11c
Last injection molded article 2 is set.
That is, it is preferred that in addition 11 extending direction Le and reinforcing rib 11c extending direction Lr between angle, θ be greater than 0 °, and
And below established angle λ.Especially, if only considering deformation caused by shrinking, particularly preferred above-mentioned angle, θ is and established angle λ
Identical size.Here, since the established angle λ of stator blade 13 is determined as to a certain degree, specifically, preferably 0 ° of < θ≤
12°.In addition, extending direction Lr from extending direction Le of the above-mentioned angle, θ from addition 11 to reinforcing rib 11c direction, and from turbine
The direction of from axis direction La to the established angle λ of blade string Lc are opposite.
Fig. 6 indicates the end face of metal powder injection molding body 2 relative to the inclined variation of turbine axis direction La.Such as Fig. 6
It is shown, there is also because of relationship with the established angle λ of stator blade 13, and the case where reinforcing rib 11c is tilted in this wise.In this variation
In, 11 extending direction Le and turbine axis direction La are not parallel in addition.In the case where as shown in Figure 6, can reduce relative to
The difference of the overhang OH1 and OH2 of the tyre 11 of reinforcing rib 11c, so as to effectively inhibit metal powder injection molding body 2
Deformation caused by deformation when (metal product 1) is shunk.
Next, the gap g (referring to Fig. 4 (a)) to above-mentioned joint portion 3 is illustrated.As shown in Fig. 7 (a), prepare two
Piece metal powder injection molding plate 6, using spacer 7, makes the gold of another party on the metal powder injection molding plate 6 of a side
Belong to powder injection-molded plate 6 to tilt, forms gap between two panels metal powder injection molding plate 6.By the water for making spacer 7
Flat change in location can adjust the size in gap.Coating agent 4 is applied in the gap and makes 6 degreasing of metal powder injection molding plate
And sintering, and measure the clearance C that two panels metal powder injection molding plate 6 can be engaged with sufficient intensity.It can be realized foot
The clearance C of enough bond strengths is 0.1mm.It is therefore preferable that the gap g at joint portion 3 is located at 0.1mm or less.
In addition, the metal powder and bonding agent etc. of the corresponding raw material for becoming metal powder injection molding plate 6, above-mentioned gap
C can change.That is, the gap g at joint portion 3 it is not necessary to be limited at 0.1mm hereinafter, rule of thumb preferably 0.1mm~
0.5mm or less.
Joint method according to the present embodiment, coating agent 4 contains nitrogen (N) or chlorine (Cl), so can make coating agent 4
Decomposition rate is slower.Therefore, it can maintain the metal powder injection molding body 2 when degreasing or sintering is mutual to be adjacent to shape longerly
State can be improved the bond strength at joint portion 3.
The present invention is not limited to above-mentioned embodiments, can be carried out a variety of change in the range without departing from purport of the invention
Become.For example, it is also possible to which band 12 forms reinforcing rib inside.In addition, metal product when reinforcing rib 11c is in order to improve degreasing or sintering
The form accuracy of 1 (metal powder injection molding body 2) and be arranged, so there is also be cut to stator blade unit complete when the case where
(even if reinforcing rib 11c is cut, and the angle, θ of reinforcing rib 11c can also be judged according to revolution mark).In addition, reinforcing rib 11c
It can also be arranged in a metal powder injection molding body 2 multiple.
Claims (2)
1. a kind of joint method of metal powder injection molding body,
Make to be kneaded metal powder and bonding agent respectively and to carry out injection molding at least two metal powder injection moldings body mutual
It abuts, above-mentioned bonding agent, which contains the wax to volatilize at 250 DEG C of temperature below and decomposes at 500 DEG C of temperature below, to disperse
Resin,
The coating agent containing nitrogen or chlorine is applied at the joint portion that above-mentioned at least two metal powder injection moldings body is abutted,
By being taken off to the above-mentioned at least two metal powder injection moldings body for being coated with above-mentioned coating agent at above-mentioned joint portion
Rouge and sintering, come make above-mentioned at least two metal powder injection moldings body above-mentioned joint portion with enough bond strengths engage and
Metal product is made,
The joint method of above-mentioned metal powder injection molding body is characterized in that,
The above-mentioned wax that above-mentioned bonding agent contains volatilizees at 250 DEG C of temperature below, and the above-mentioned resin that above-mentioned bonding agent contains exists
The temperature range that the volatilization temperature of the above-mentioned wax contained than above-mentioned bonding agent is high is dispersed,
In above-mentioned at least two metal powder injection moldings body degreasing or when being sintered, at least part of above-mentioned coating agent is than upper
It states wax to volatilize later, disperse earlier than above-mentioned resin,
Above-mentioned coating agent is wax with-NHCOO-, has-CONH2Wax, chlorinated wax or the hot melt with-NHCOO-
Glue sticking agent,
Realize the above-mentioned joint portion of enough bond strengths gap be 0.1mm hereinafter,
Above-mentioned metal product is the vane sector for the band portion for having multiple blades and supporting above-mentioned multiple blades,
Above-mentioned at least two metal powder injection moldings body is the dividing body with the above-mentioned vane sector of single blade respectively,
On the back side in the face for being provided for erecting above-mentioned blade of above-mentioned band portion, it is formed with towards the blade string with above-mentioned blade
The reinforcing rib that the direction of intersection extends,
It, will if the angle of the extending direction of the above-mentioned band portion on above-mentioned dividing body and the extending direction of above-mentioned reinforcing rib is set as θ
The width of above-mentioned band portion is set as A, is B by its height, then the stability S of above-mentioned metal powder injection molding body can be by S=
10·log10(B/A) it acquires, the unit of aforementioned stable degree S is decibel, 0 ° of θ≤12 ° <.
2. the joint method of metal powder injection molding body according to claim 1, which is characterized in that
Above-mentioned coating agent is only applied to all sides at above-mentioned joint portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-214346 | 2013-10-15 | ||
| JP2013214346 | 2013-10-15 | ||
| PCT/JP2014/074514 WO2015056513A1 (en) | 2013-10-15 | 2014-09-17 | Method for bonding metal powder injection molded bodies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105612015A CN105612015A (en) | 2016-05-25 |
| CN105612015B true CN105612015B (en) | 2019-04-12 |
Family
ID=52827966
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480056174.8A Expired - Fee Related CN105612015B (en) | 2013-10-15 | 2014-09-17 | The joint method of metal powder injection molding body |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20160221081A1 (en) |
| EP (1) | EP3059033A4 (en) |
| JP (1) | JP6245268B2 (en) |
| KR (1) | KR20160098182A (en) |
| CN (1) | CN105612015B (en) |
| CA (1) | CA2926768C (en) |
| TW (1) | TWI511815B (en) |
| WO (1) | WO2015056513A1 (en) |
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| DE102015210770A1 (en) * | 2015-06-12 | 2016-12-15 | Rolls-Royce Deutschland Ltd & Co Kg | Component construction, component for a gas turbine and method for producing a component of a gas turbine by metal powder injection molding |
| FR3039839B1 (en) * | 2015-08-06 | 2019-12-20 | Safran Aircraft Engines | PROCESS FOR MANUFACTURING A PART OF COMPOSITE MATERIAL |
| CN105562696A (en) * | 2016-01-11 | 2016-05-11 | 江西理工大学 | Metal 3D printing method |
| CN106735170B (en) * | 2016-12-20 | 2019-01-25 | 佛山铂利镁特金属科技有限公司 | A kind of injection moulding method of big part metalwork |
| US11305346B2 (en) * | 2017-04-27 | 2022-04-19 | Federal-Mogul Valvetrain Gmbh | Poppet valve and method of its manufacture |
| FR3066936B1 (en) * | 2017-06-01 | 2019-11-01 | Safran | IMPROVED CO-CLEANING WELDING PROCESS |
| WO2018220213A1 (en) * | 2017-06-01 | 2018-12-06 | Safran | Method for improved manufacturing of a dual microstructure part |
| KR102013256B1 (en) * | 2017-11-23 | 2019-10-21 | 두산중공업 주식회사 | Steam turbine |
| CN108326308A (en) * | 2017-12-25 | 2018-07-27 | 杭州铭赫科技有限公司 | A kind of hollow and thin-walled structural metal powder fission injection moulding splicing sintering method |
| CN108687348A (en) * | 2018-05-25 | 2018-10-23 | 合肥汇智新材料科技有限公司 | A kind of Novel valve core production technology |
| FR3096912B1 (en) * | 2019-06-07 | 2021-10-29 | Safran Aircraft Engines | A method of manufacturing a turbomachine part by MIM molding |
| KR102289703B1 (en) | 2019-12-31 | 2021-08-17 | 한국과학기술원 | Chip-scale atomic clock |
| JP7435161B2 (en) * | 2020-03-30 | 2024-02-21 | セイコーエプソン株式会社 | Manufacturing method of metal composite sintered body |
| DE102020133998A1 (en) * | 2020-12-17 | 2022-06-23 | Rolls-Royce Deutschland Ltd & Co Kg | Blade component, method of manufacture thereof and gas turbine |
| CN114289996B (en) * | 2021-12-15 | 2023-04-11 | 北京航星机器制造有限公司 | Large-size platform manufacturing and creep control method |
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| JP3647066B2 (en) * | 1994-07-06 | 2005-05-11 | オリンパス株式会社 | Manufacturing method of sintered body |
| CN101344015A (en) * | 2007-07-13 | 2009-01-14 | 斯奈克玛 | Liners for turbine blades |
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| JPH0711305A (en) * | 1993-06-28 | 1995-01-13 | Seiko Instr Inc | Method for joining injection molded articles of metallic powder and ceramic powder |
| JP2004197622A (en) | 2002-12-17 | 2004-07-15 | Ishikawajima Harima Heavy Ind Co Ltd | Turbine compressor vane |
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| JP2006249943A (en) * | 2005-03-08 | 2006-09-21 | Honda Motor Co Ltd | Centrifugal impeller |
| CN1873245A (en) * | 2005-05-31 | 2006-12-06 | 李茂碷 | Circulator and manufacturing method |
| JP2007117306A (en) * | 2005-10-26 | 2007-05-17 | Sri Sports Ltd | Golf club shaft |
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- 2014-09-17 EP EP14854623.7A patent/EP3059033A4/en not_active Withdrawn
- 2014-09-17 KR KR1020167012218A patent/KR20160098182A/en not_active Ceased
- 2014-09-17 WO PCT/JP2014/074514 patent/WO2015056513A1/en active Application Filing
- 2014-09-17 CA CA2926768A patent/CA2926768C/en active Active
- 2014-09-17 JP JP2015542549A patent/JP6245268B2/en active Active
- 2014-09-17 CN CN201480056174.8A patent/CN105612015B/en not_active Expired - Fee Related
- 2014-10-02 TW TW103134399A patent/TWI511815B/en not_active IP Right Cessation
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2016
- 2016-04-07 US US15/093,246 patent/US20160221081A1/en not_active Abandoned
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| JP3647066B2 (en) * | 1994-07-06 | 2005-05-11 | オリンパス株式会社 | Manufacturing method of sintered body |
| CN101344015A (en) * | 2007-07-13 | 2009-01-14 | 斯奈克玛 | Liners for turbine blades |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2015056513A1 (en) | 2015-04-23 |
| US20160221081A1 (en) | 2016-08-04 |
| TWI511815B (en) | 2015-12-11 |
| JP6245268B2 (en) | 2017-12-13 |
| CA2926768C (en) | 2018-10-23 |
| EP3059033A4 (en) | 2017-06-21 |
| JPWO2015056513A1 (en) | 2017-03-09 |
| EP3059033A1 (en) | 2016-08-24 |
| CN105612015A (en) | 2016-05-25 |
| CA2926768A1 (en) | 2015-04-23 |
| TW201524640A (en) | 2015-07-01 |
| KR20160098182A (en) | 2016-08-18 |
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