CN110216053A - A kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces - Google Patents
A kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces Download PDFInfo
- Publication number
- CN110216053A CN110216053A CN201910553478.XA CN201910553478A CN110216053A CN 110216053 A CN110216053 A CN 110216053A CN 201910553478 A CN201910553478 A CN 201910553478A CN 110216053 A CN110216053 A CN 110216053A
- Authority
- CN
- China
- Prior art keywords
- hole
- sealing
- temperature
- powder metallurgy
- workpiece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 30
- 238000005516 engineering process Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 55
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 238000005422 blasting Methods 0.000 claims abstract description 23
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000002791 soaking Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 238000005119 centrifugation Methods 0.000 claims description 4
- 239000012224 working solution Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 230000000873 masking effect Effects 0.000 abstract description 4
- 238000004381 surface treatment Methods 0.000 abstract description 4
- 239000002421 finishing Substances 0.000 abstract 2
- 239000004519 grease Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Chemical group 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229940056319 ferrosoferric oxide Drugs 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WTFXARWRTYJXII-UHFFFAOYSA-N iron(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+3].[Fe+3] WTFXARWRTYJXII-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of Pretreatment Technology Before Finishings of powder metallurgy workpieces, including high-temperature baking oil removing；Impeller blasting；Sealing of hole；Ball blast；Coating;Wherein hole-sealing technology includes normal temperature and pressure sealing of hole and vapor sealing of hole.The Pretreatment Technology Before Finishing of this kind of powder metallurgy workpieces solves pore problem by the technique of sealing of hole before coating, workpiece surface can be completely covered in masking liquid when Coating Pretreatment being enabled to not remain pretreatment liquid and coating in the process, solve the problems, such as that the surface treatment of powder metallurgy workpieces is difficult to meet the corrosion resistance requirement under different operating conditions.
Description
Technical field
The present invention relates to the Pretreatment Technology Before Finishing technical field of workpiece more particularly to a kind of coatings of powder metallurgy workpieces
Pre-treating technology.
Background technique
Powder metallurgy is to produce metal powder or made with metal powder (or mixture of metal powder and non-metal powder)
The industrial technology of metal material, composite material and various types product is produced by shaping and being sintered for raw material.Currently, powder
Last metallurgical technology has been widely used in traffic, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industry
Equal fields become in new material science most one of the branch of development vitality.PM technique have significant energy conservation, material saving,
It has excellent performance, the series of advantages such as Product Precision is high and stability is good, is very suitable for producing in enormous quantities.In addition, powder metallurgy
With unique chemical composition and mechanical, physical property, and these performances can not be obtained with traditional casting method.With
PM technique can be directly prepared into porous, half fine and close or full dense material and product, such as oiliness bearing, gear, cam, lead
Bar, cutter etc. are a kind of few without Cutting Process, the material that can not partially be prepared with conventional casting methods and machining process and
Complex parts can also be manufactured with PM technique, thus by the attention of industry.
It is set however, being assembled at present by the workpiece of powder metallurgical technique manufacture in progress workpiece in mechanical equipment on the market
After standby, since technological reason inside presence is more porous, these holes will cause during Coating Pretreatment powder metallurgy workpieces
Useful treatment fluid can not be successfully into pore interior before and after residual treatment liquid or coating, cause at the surface of powder metallurgy workpieces
Reason is difficult to meet the requirement of the corrosion resistance under different operating conditions.
Summary of the invention
In view of the above-mentioned state of the art, the present invention provides a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces, should
When the Pretreatment Technology Before Finishing of kind powder metallurgy workpieces enables to Coating Pretreatment not remain pretreatment liquid and coating in the process
Workpiece surface, and the process flow to reliable sealing of hole is carried out before powder metallurgy workpieces coating can be completely covered in masking liquid, solve powder
The surface treatment of last metallurgy workpiece is difficult to meet the problem of corrosion resistance under different operating conditions requires.
The invention is realized by the following technical scheme.
The technical scheme of the invention to solve the technical problem is:
A kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces, comprising the following steps: step 1. high-temperature baking oil removing；Step 2. is thrown
Ball derusting；Step 3. sealing of hole；Step 4. ball blast；Step 5. coating;Step 3 sealing of hole includes that normal temperature and pressure sealing of hole and water steam
Sealing gland hole, the normal temperature and pressure sealing of hole: i.e. by the clean workpiece through high-temperature baking oil removing and impeller blasting twice technique at 4
It is immersed in normal-temperature hole sealing agent working solution in hour, soaking time 1-3 minutes, centrifuge drying is put into after simply draining, wherein from
The centrifugal rotational speed of scheming is 180-350 revs/min, and centrifugation time is 4-20 seconds, and the workpiece after drying is toasted,
In, baking temperature is 100-250 DEG C, and baking time is 20-30 minutes, the vapor sealing of hole: will pass through high-temperature baking
The clean workpiece of oil removing and impeller blasting twice technique carries out vapor sealing pores, wherein temperature is 540 DEG C -570 DEG C, is steamed
Steam pressure is 0.4-0.6MPa, and steam inlet flow is 6m3/h, and soaking time is 60-200 minutes.
Further, baking temperature described in high-temperature baking oil removing described in step 1 is 300-350 DEG C, time 15-
60 minutes, to include that intrapore grease is thoroughly carbonized by inside workpiece, eliminate grease.
Further, the specific steps are the workpiece after high-temperature baking oil removing is carried out ball blast for impeller blasting described in step 2
Derusting, wherein the electric current of impeller blasting is 8-20A, and the time is 10-45 minutes, thus by the magazine and oxide of workpiece surface
It removes clean.
Further, the specific steps are the workpiece after sealing of hole should be re-started ball blast for ball blast described in step 4
Except the extra hole sealing agent of workpiece surface or oxide layer, wherein ball blast electric current is 8-20A, and the time is 8-15 minutes, to remove
The extra hole sealing agent of workpiece surface or oxide layer.
Further, coating is carried out in 4 hours after tetra- procedure of step 1-4 is painted on described in the step 5,
To avoid getting rusty.
Compared with the prior art, the advantages of the present invention are as follows:
The present invention provides a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces, comprising the following steps: step 1. high-temperature baking removes
Oil；Step 2. impeller blasting；Step 3. sealing of hole；Step 4. ball blast；Step 5. coating;Wherein, step 3 sealing of hole includes normal temperature and pressure
Sealing of hole and vapor sealing of hole.The Pretreatment Technology Before Finishing of this kind of powder metallurgy workpieces enables to Coating Pretreatment not residual in the process
Masking liquid can be completely covered workpiece surface when staying pretreatment liquid and coating, and to carrying out reliable sealing of hole before powder metallurgy workpieces coating
Process flow solves the problems, such as that the surface treatment of powder metallurgy workpieces is difficult to meet the corrosion resistance requirement under different operating conditions.
Detailed description of the invention
Fig. 1 is integrated artistic flow chart of the invention；
Fig. 2 is 1 concrete technology flow process figure of the embodiment of the present invention；
Fig. 3 is 2 concrete technology flow process figure of the embodiment of the present invention.
Specific embodiment
As shown in Figure 1, a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces, comprising the following steps: step 1. high temperature dries
Roasting oil removing；Step 2. impeller blasting；Step 3. sealing of hole；Step 4. ball blast；Step 5. coating;Step 3 sealing of hole includes normal
Normal temperature and pressure sealing of hole and vapor sealing of hole, the normal temperature and pressure sealing of hole: i.e. will be through high-temperature baking oil removing and impeller blasting twice work
The clean workpiece of skill immerses in normal-temperature hole sealing agent working solution within 4 hours, and soaking time is 1-3 minutes, wherein soaking process
In need repeatedly to stir workpiece into commutation, be put into after simply draining centrifuge drying, wherein the centrifugal rotational speed of centrifuge be 180-
350 revs/min, centrifugation time is 4-20 seconds, the workpiece after drying is toasted, wherein baking temperature 100-250
DEG C, baking time is 20-30 minutes, to carry out coating baking due to subsequent, hole sealing agent should select high temperature resistant type, and hole sealing agent is resistance to
Temperature should be more than subsequent coating baking temperature, the vapor sealing of hole: will pass through high-temperature baking oil removing and impeller blasting two
The clean workpiece of road technique carries out vapor sealing pores, wherein temperature is 540 DEG C -570 DEG C, steam pressure 0.4-
0.6MPa, steam inlet flow are 6m3/h, and soaking time is 60-200 minutes, by the workpiece surface after steam treatment
Should be in glossiness black-and-blue, main component should be ferroso-ferric oxide, baking described in high-temperature baking oil removing described in step 1
Roasting temperature is 300-350 DEG C, and the time is 15-60 minutes, to include that intrapore grease is thoroughly carbonized by inside workpiece, is eliminated
Grease, the specific steps are the workpiece after high-temperature baking oil removing is carried out impeller blasting for impeller blasting described in step 2, wherein throws
The electric current of ball derusting is 8-20A, and the time is 10-45 minutes, so that the magazine of workpiece surface and oxide are removed clean, step
The specific steps are the workpiece after sealing of hole should be re-started the extra hole sealing agent of ball blast removal workpiece surface for ball blast described in 4
Or oxide layer, wherein ball blast electric current be 8-20A, the time be 8-15 minutes, thus remove the extra hole sealing agent of workpiece surface or
Person's oxide layer carries out coating, to avoid in 4 hours after being painted on tetra- procedure of step 1-4 described in the step 5
It gets rusty.
Specific embodiment 1: as shown in Fig. 2, a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces, including high-temperature baking remove
Oil processing, baking temperature are 300-350 DEG C, and the time is 15-60 minutes, to include that intrapore grease is thorough by inside workpiece
Grease is eliminated in carbonization；Impeller blasting processing, electric current 8-20A, the time be 10-45 minute, thus by the magazine of workpiece surface with
Oxide is removed clean；Clean workpiece through upper twice technique is immersed room temperature envelope by normal temperature and pressure sealing pores within 4 hours
In hole agent working solution, soaking time is 1-3 minutes, wherein needs repeatedly to stir workpiece into commutation in soaking process, simply drain
After be put into centrifuge drying, wherein the centrifugal rotational speed of centrifuge be 180-350 revs/min, centrifugation time be 4-20 seconds, will pass through
Workpiece after drying is toasted, and baking temperature is 100-250 DEG C, and baking time is 20-30 minutes, to be applied due to subsequent
Dress baking, hole sealing agent should select high temperature resistant type, wherein hole sealing agent heatproof should be more than subsequent coating baking temperature；Shot Blasting,
Workpiece after sealing of hole should be re-started into Shot Blasting, ball blast electric current is 8-20A, and the time is 8-15 minutes, to remove
The extra hole sealing agent of workpiece surface or oxide layer；Painting treatment, should be within 4 hours by the workpiece after preceding four procedure
Coating is carried out, to avoid getting rusty.
Specific embodiment 2: as shown in figure 3, a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces, including high-temperature baking remove
Oil processing, baking temperature are 300-350 DEG C, and the time is 15-60 minutes, to include that intrapore grease is thorough by inside workpiece
Grease is eliminated in carbonization；Impeller blasting processing, electric current 8-20A, the time be 10-45 minute, thus by the magazine of workpiece surface with
Oxide is removed clean；Clean workpiece Jing Guo upper twice technique is carried out vapor sealing pores by vapor sealing pores,
In, temperature is 540 DEG C -570 DEG C, steam pressure 0.4-0.6MPa, and steam inlet flow is 6m3/h, soaking time 60-
200 minutes, wherein should be in glossiness black-and-blue by the workpiece surface after steam treatment, main component should be four
Fe 3 O；Workpiece after sealing of hole should be re-started Shot Blasting by Shot Blasting, and ball blast electric current is 8-20A, and the time is
8-15 minutes, to remove the extra hole sealing agent of workpiece surface or oxide layer；Painting treatment, will be after preceding four procedure
Workpiece should carry out coating within 4 hours, to avoid getting rusty.
The Pretreatment Technology Before Finishing of this kind of powder metallurgy workpieces enables to not remain pre-treatment during Coating Pretreatment
Workpiece surface can be completely covered in masking liquid when liquid and coating, and to the technique stream for carrying out reliable sealing of hole before powder metallurgy workpieces coating
Journey solves the problems, such as that the surface treatment of powder metallurgy workpieces is difficult to meet the corrosion resistance requirement under different operating conditions, Er Qiejing
Crossing our company a large number of experiments proves, applies Non-chromium Zn-al Coating (custom by the two of the Pretreatment Technology Before Finishing of this kind of powder metallurgy workpieces
Claim environmentally friendly Dacroment) can it is stable by neutral salt spray test (ISO9227) 480 hours/720 hours without red rust, three apply can
To pass through 1000 hours/1500 hours without red rust.So that ferrous based powder metallurgical workpiece has from this and common iron and steel parts are applying
Same corrosion resistance can be reached after dress, solve the problems, such as industry pain spot at one stroke.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of skill in the art that it still can be right
Technical solution documented by foregoing embodiments is modified, or is replaced on an equal basis to part of technical characteristic；And this
It modifies or replaces, the spirit and model of technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (5)
1. a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces, comprising the following steps: step 1. high-temperature baking oil removing；Step 2.
Impeller blasting；Step 3. sealing of hole；Step 4. ball blast；Step 5. coating;It is characterized in that, step 3 sealing of hole includes room temperature
Normal pressure sealing of hole and vapor sealing of hole, the normal temperature and pressure sealing of hole: i.e. will be through high-temperature baking oil removing and impeller blasting twice technique
Clean workpiece immersed in normal-temperature hole sealing agent working solution within 4 hours, soaking time be 1-3 minutes, be put into after simply draining
Centrifuge drying, wherein the centrifugal rotational speed of centrifuge is 180-350 revs/min, and centrifugation time is 4-20 seconds, will be after drying
Workpiece toasted, wherein baking temperature be 100-250 DEG C, baking time be 20-30 minutes, the vapor sealing of hole:
Vapor sealing pores will be carried out by the clean workpiece of high-temperature baking oil removing and impeller blasting twice technique, wherein temperature
It is 540 DEG C -570 DEG C, steam pressure 0.4-0.6MPa, steam inlet flow is 6m3/h, and soaking time is 60-200 minutes.
2. a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces according to claim 1, which is characterized in that step 1 institute
Baking temperature described in the high-temperature baking oil removing stated is 300-350 DEG C, and the time is 15-60 minutes.
3. a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces according to claim 2, which is characterized in that step 2 institute
The specific steps are the workpiece after high-temperature baking oil removing is carried out impeller blasting for the impeller blasting stated, wherein the electric current of impeller blasting
For 8-20A, the time is 10-45 minutes.
4. a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces according to claim 3, which is characterized in that step 4 institute
The ball blast stated the specific steps are by the workpiece after sealing of hole should re-start the ball blast extra hole sealing agent of removal workpiece surface or
Person's oxide layer, wherein ball blast electric current is 8-20A, and the time is 8-15 minutes.
5. a kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces according to claim 4, which is characterized in that the step
Coating is carried out in 4 hours after being painted on tetra- procedure of step 1-4 described in rapid 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910553478.XA CN110216053A (en) | 2019-06-25 | 2019-06-25 | A kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910553478.XA CN110216053A (en) | 2019-06-25 | 2019-06-25 | A kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110216053A true CN110216053A (en) | 2019-09-10 |
Family
ID=67814756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910553478.XA Pending CN110216053A (en) | 2019-06-25 | 2019-06-25 | A kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110216053A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346244A (en) * | 2021-12-27 | 2022-04-15 | 广东东睦新材料有限公司 | Surface treatment method of iron-based powder metallurgy workpiece and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693234A (en) * | 2009-10-16 | 2010-04-14 | 河海大学 | Micropore ultrasonic plugging method |
| CN102615285A (en) * | 2012-03-23 | 2012-08-01 | 兴城市粉末冶金有限公司 | Automotive powder metallurgic ABS (acrylonitrile-butadiene-styrene) gear ring treating method |
-
2019
- 2019-06-25 CN CN201910553478.XA patent/CN110216053A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693234A (en) * | 2009-10-16 | 2010-04-14 | 河海大学 | Micropore ultrasonic plugging method |
| CN102615285A (en) * | 2012-03-23 | 2012-08-01 | 兴城市粉末冶金有限公司 | Automotive powder metallurgic ABS (acrylonitrile-butadiene-styrene) gear ring treating method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346244A (en) * | 2021-12-27 | 2022-04-15 | 广东东睦新材料有限公司 | Surface treatment method of iron-based powder metallurgy workpiece and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108372303B (en) | Method for manufacturing a part made by powder metallurgy comprising applying a coating | |
| CN104831278B (en) | The method for coating the cylinder bore and cylinder block of internal combustion engine | |
| CN106676538A (en) | Environment-friendly technology for copper and copper alloy surface treatment | |
| JP2011027104A (en) | Forming method of coating layer for turbomachine component, component itself, and corresponding machine | |
| CN105296956B (en) | A kind of cobalt-base alloys blade inner chamber and the process of outer surface aluminising | |
| CN106222596A (en) | A kind of environment-friendly type galvanizing by dipping no acidwashing craft | |
| EP2233534A1 (en) | Method for producing a protective coating for a component of a turbomachine, the component itself and the respective machine | |
| CN110216053A (en) | A kind of Pretreatment Technology Before Finishing of powder metallurgy workpieces | |
| CN104746072A (en) | Magnesium alloy microarc ion plating surface treatment method | |
| CN114481012B (en) | Multielement alloy co-permeation agent for steel member and corrosion prevention process thereof | |
| CN101760714B (en) | Method for immersion-plating titanium alloy parts | |
| CN108364780A (en) | A kind of preparation method of Sintered NdFeB magnet surface high-corrosion-resistance coating | |
| CN104342713A (en) | Method removing aluminum oxide-titanium oxide ceramic seal coating | |
| CN106591769B (en) | A kind of preparation method of steel material surface wear-resistant self-lubricating black composite coating | |
| CN101629296B (en) | Remover composite for removing nickel-chromium-aluminum-yttrium coating and method thereof | |
| JPS60224792A (en) | Method of chemically removing aluminum dispersion layer fromprocessing material | |
| CN109182973A (en) | A kind of preparation method of coating for protection against corrosion | |
| CN100513642C (en) | Process of combining ceramic layer onto surface of iron base material | |
| CN106282954A (en) | The processing method of copper-based alloy bearing bush compound work antifriction layer | |
| CN112064007A (en) | Passivation treatment process method of cast aluminum alloy for integrated stove gas valve | |
| CN106757026A (en) | A kind of minimizing technology of engine turbine blade AlSiY coatings | |
| CN112934640A (en) | Passivation and dacromet composite treatment method for cast aluminum alloy for integrated stove gas valve | |
| CN106111508A (en) | A kind of surface coating process of case of transmission | |
| CN108568395B (en) | A spray painting process to replace the anode effect of die-casting aluminum surface | |
| CN104498936B (en) | The method that mechanical induction synthesizes metal ceramic wear-resisting layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190910 |