CN108580884B - Hydrogen roll compacting combination process is set for improve increasing material manufacturing titanium alloy tissue - Google Patents
Hydrogen roll compacting combination process is set for improve increasing material manufacturing titanium alloy tissue Download PDFInfo
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- CN108580884B CN108580884B CN201810755021.2A CN201810755021A CN108580884B CN 108580884 B CN108580884 B CN 108580884B CN 201810755021 A CN201810755021 A CN 201810755021A CN 108580884 B CN108580884 B CN 108580884B
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 125
- 239000001257 hydrogen Substances 0.000 title claims abstract description 85
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 85
- 239000000463 material Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 58
- 230000008569 process Effects 0.000 title claims abstract description 37
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000000843 powder Substances 0.000 claims abstract description 56
- 238000012545 processing Methods 0.000 claims abstract description 20
- 238000000137 annealing Methods 0.000 claims abstract description 12
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 40
- 238000000227 grinding Methods 0.000 claims description 25
- 238000005096 rolling process Methods 0.000 claims description 25
- 238000001465 metallisation Methods 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 11
- 150000003608 titanium Chemical class 0.000 claims description 10
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 9
- 238000007639 printing Methods 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 239000006104 solid solution Substances 0.000 claims description 8
- 238000003872 feeding technique Methods 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 25
- 239000000956 alloy Substances 0.000 abstract description 16
- 229910045601 alloy Inorganic materials 0.000 abstract description 15
- 230000007547 defect Effects 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 8
- 230000006911 nucleation Effects 0.000 abstract description 6
- 238000010899 nucleation Methods 0.000 abstract description 6
- 238000005275 alloying Methods 0.000 abstract description 5
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000007670 refining Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 6
- 238000005272 metallurgy Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 150000004678 hydrides Chemical group 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000004781 supercooling Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000002269 spontaneous effect Effects 0.000 description 4
- 229910021330 Ti3Al Inorganic materials 0.000 description 3
- 238000005137 deposition process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002667 nucleating agent Substances 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 2
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- 238000010891 electric arc Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 208000030208 low-grade fever Diseases 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- 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
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
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- 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
- B22F3/24—After-treatment of workpieces or articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/60—Planarisation devices; Compression devices
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Abstract
The present invention, which provides, a kind of sets hydrogen roll compacting combination process for improve increasing material manufacturing titanium alloy tissue, by during increasing material manufacturing, titanium alloy powder is carried out to set hydrogen processing, and increasing material manufacturing is combined to carry out layer-by-layer roll compacting to printout in the process, pass through printing-roll compacting-printing-roll compacting cyclic process, interim alloy element hydrogen is removed finally by vacuum annealing, avoids the change of the chemical component of final material by the printout for preparing structure refinement.The process utilizes hydrogen to refine in the process simultaneously improves printout tissue and roll compacting increase dislocation defects, reduces forming core energy, improves nucleation rate, achievees the purpose that refining crystal grain improves tissue but do not change alloying component.
Description
Technical field
The present invention relates to material increasing fields, handle in particular to the improvement to titanium alloy tissue, especially a kind of
Hydrogen+roll compacting process is set for improve increasing material manufacturing titanium alloy tissue.
Background technique
The Heating style used during increasing material manufacturing includes laser, electric arc, plasma, electron beam etc., and is increasing material
Exist under the extraordinary metallurgy environment for quickly heating, being quickly cooled down in manufacturing process, increasing material manufacturing metallurgical quality is poor, organizational coarseness.
Being related to material forms includes powder and silk material, but regardless of light source and object form change, the metallurgical feature of process of setting
Essentially identical: metal microcell is rapidly heated under the action of central heat source, rapid solidification, during subsequent layer by layer deposition
After the multicycle, become circulation, acutely heating and cooling, adjacent layer or several layers of generations circulation remelting are cooling, other sedimentary crystal grain
Then handled by circulation low-grade fever.Remelting and low-grade fever processing are recycled, causes the microstructure of increasing material manufacturing metal component unique.?
During titanium alloy is the increasing material manufacturing of raw material, the crystal grain such as selective laser fusing, laser deposition molding are raw perpendicular to substrate interface
Grow up to coarse Original β grain, column crystal, only a small amount of isometric or small grains occurs in bottom and top, formed extremely uneven
Tissue signature, this coarse group be woven in the higher electron beam of energy density, electric arc increases in material technique, or even develop into and run through
Column crystal.Nevertheless, very fast cooling be also brought inside coarse grain tiny lamella or acicular martensitic structure this
Extraordinary particular tissues, this is also why increasing material manufacturing titanium alloy structure part deposited mechanical property is generally higher than casting even forging
Principal element.
Around this problem, the prior art has carried out a large amount of pilot studys, from increasing material manufacturing technique itself, addition
Reinforcing particle is refined crystal grain and is carried out the regulation of microstructure using magnetic field, electric field, ultrasound, laser, micro- forging etc., it is intended to be solved
Certainly increasing material manufacturing metallurgy problem:
1, realize that metallurgy improves to a certain extent by the regulation of increasing material manufacturing technological parameter.The prior art is from control
The size for attempting to reduce column crystal by technique in shape process parameter and subsequent heat treatment technique is made.For example,
The column crystal that P.A.Kobryn et al. has studied Ti-6Al-4V Alloy by Laser cladding generates rule, the results showed that high-temperature gradient
Be conducive to the growth of column crystal with big cooling rate, high scanning speed can reduce the size of column crystal；
But carrying out control by technique is to carry out tissue modulation, increasing material manufacturing laser, electron beam etc. from the angle of degree of supercooling
The heating of high energy heat source, solidification rate is in 0.1ms-1 to 5ms-1, on temperature gradient is very high-level at one, is joined by technique
Number adjusts refined crystalline strengthening difficult to realize；
2, it adds nucleating agent or alloy element is the potential approach for realizing increasing material manufacturing structure refinement, U.S. Banerjee
Ti-TiB and Ti6Al4V-TiB composite material is successfully prepared Deng using laser stereoforming technology, TiB reinforcement can be uniform
It is distributed in deposited alloy, and can thinning microstructure to a certain extent.It is from increase nucleation mass point by adding nucleating agent
Come realize tissue improve, but add nucleating agent will affect alloying component, require stringent alloy to be also not suitable for alloying component；
3, by improving the raw material of increasing material manufacturing into the improvement of microstructure, such as Chinese patent
The cycling hot hydrogen treatment process for the raising TC4 titanium alloy temperature-room type plasticity that CN201610032762.9 is proposed, carries out TC4 titanium alloy
Secondary cycle sets hydrogen processing, i.e., carries out after once setting hydrogen processing to TC4 titanium alloy, then dehydrogenation, then carry out at secondary Pin hydrogen again
Reason finally carries out solution hardening processing.Secondary Pin hydrogen processing method of the present invention improves the ratio of α phase and β phase in TC4 titanium alloy
Example, increases the content of the preferable β phase of plasticity in alloy, reduces the content of α ' martensite, refined crystal grain, to make its room
Warm plasticity is further improved；After secondary cycle hot stressing, the ultimate deformation for improving TC4 titanium alloy is improved
22.1%, yield strength reduces by 11.1%, and yield tensile ratio reduces by 11.5%.But it has a disadvantage in that subsequent in TC4 alloy merely with hydrogen
Heat treatment process refine crystal grain effect, and cannot using hydrogen circulation of melt deposition process promote elements diffusion and increase liquid/
Liquid/solid interface constitutional supercooling；Hydride forms and decomposes, sets hydrogen reduction resistance of deformation and promote dislocation motion and then formed to deform to lack
It falls into, from multidimensional, multi-angle promotes non-spontaneous forming core, refines the effect of crystal grain.
In addition, Zhao Jiaqi et al., which sets hydrogen-hot isostatic pressing in Chinese patent CN201110419193.0 proposition, improves casting
Ti3The method of Al alloy microstructure, comprising: one, to casting Ti3Al alloy carries out heat and other static pressuring processes processing；Two, by heat etc.
Ti after static pressure process3Al alloy carries out setting hydrogen processing；Three, opposed hydrogen treated Ti3Al alloy is dissolved, timeliness
Processing；Four, vacuum annealing process is finally carried out.Conducive to heat and other static pressuring processes, casting Ti is repaired3Hole in Al alloy etc. lacks
It falls into, improves the consistency of alloy；On the other hand again using hydrogen in casting Ti3Reversible alloying effect in Al alloy and each
Kind phase transformation, refinement casting Ti3The microstructure of Al alloy makes up coarse grains and adversely affects to alloy property bring.But it is same
Sample has a disadvantage in that merely with hydrogen in Ti3Al alloy follow-up heat treatment process refines the effect of crystal grain, and cannot be existed using hydrogen
Circulation of melt deposition process promotes elements diffusion and increases the supercooling of liquid/solid Interface composition；Hydride forms and decomposes, sets hydrogen reduction
Resistance of deformation simultaneously promotes dislocation motion and then forms deformation defect, and from multidimensional, multi-angle promotes non-spontaneous forming core, refines crystal grain
Effect.
Although three of the above method can improve increasing material manufacturing tissue to a certain extent, all there is a problem of it is corresponding, no
Increasing material manufacturing titanium alloy tissue can effectively be improved.Therefore, the process of increasing material manufacturing titanium alloy tissue can be improved urgently
It excavates.
Summary of the invention
Hydrogen roll compacting process, purport are set for improve increasing material manufacturing titanium alloy tissue it is an object of that present invention to provide a kind of
By during increasing material manufacturing, carrying out setting hydrogen processing to titanium alloy powder, and combine during increasing material manufacturing to printout
Layer-by-layer roll compacting is carried out, by printing-roll compacting-printing-roll compacting cyclic process, prepares the printout of structure refinement, finally by
Interim alloy element hydrogen is removed in vacuum annealing, avoids the change of the chemical component of final material, improves increasing material manufacturing titanium
Alloy structure form.
To achieve the above object, the present invention provide it is a kind of for improve increasing material manufacturing titanium alloy tissue to set hydrogen roll compacting compound
Technique includes the following steps:
Step 1, titanium alloy powder carry out setting hydrogen processing: titanium alloy powder being placed in tubular type and is set in hydrogen heat-treatment furnace, is layered
Powdering, every layer of powdering thickness 2-8mm, is evacuated to 1.5 × 10-3Pa is heated to 700 DEG C -800 with the speed of 10-20 DEG C/min
DEG C, 10~30min is kept the temperature, 0.1%~0.8% hydrogen is filled with according to the weight percent of titanium alloy powder, keeps the temperature 1-4h, so
It is cooled to room temperature afterwards with the speed of 5~15 DEG C/min to get hydrogenated titanium alloy powder is arrived；
Step 2 will set the titanium alloy powder after hydrogen and be used for increasing material manufacturing, be increased using powdering technique or powder feeding technique
Material manufactures workpiece printing, forms titanium alloy metal deposition layer；
Step 3 rolls the titanium alloy metal deposition layer that step 2 is formed using digital control system control roll, rolls
Deflection is 10~50%；
Step 4 repeats the successively printing of step 2,3 and rolling, until workpiece is completed to print；
Titanium alloy workpiece after increasing material manufacturing is carried out solution treatment by step 5, comprising: puts titanium alloy workpiece into hot place
It manages in furnace, the speed of 10-20 DEG C/min is heated to Tp DEG C+10 DEG C, keeps the temperature 20min~40min, then quenches, be wherein for Tp DEG C
Phase transition temperature；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 6, specifically includes: titanium alloy is put into very
In empty heat-treatment furnace, it is evacuated to 1.5 × 10-3Pa is heated to 700 DEG C -800 DEG C with the speed of 10-20 DEG C/min, vacuum in furnace
Degree is higher than 3 × 10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min.
Further, it in the operation of rolling of step 4, requires to roll control errors under 0.4mm amount of rolling in rolling
In 0.01mm.
Of the invention to set hydrogen roll compacting combination technological method for improve increasing material manufacturing titanium alloy tissue, remarkable advantage exists
In the solubility using hydrogen in titanium alloy, titanium alloy powder is carried out to set hydrogen processing.Simultaneously in increasing material manufacturing print procedure,
On the one hand promote elements diffusion using the hydrogen of hydrogenated titanium alloy powder and increase liquid/solid Interface composition to be subcooled；Circulation of melt deposition
The formation of process hydride and decomposition set hydrogen reduction resistance of deformation and promote dislocation motion and then form deformation defect, and promotion is non-certainly
Send out forming core；On the other hand using successively to the roll compacting of metal deposition layer, cause the deformation of metal deposition layer, improve the cause of printout
Density, meanwhile, the defects of roll compacting introduces dislocation in sedimentary, this will reduce forming core energy, and improve nucleation rate, print at next layer
In the small molten bath of process, presence the defects of dislocation can refine printing layer tissue；By the above interaction of multiple factors, with reality
Now to the metallurgy control of increasing material manufacturing tissue and being precisely controlled for column crystal/equiax crystal transformation.
It should be appreciated that as long as aforementioned concepts and all combinations additionally conceived described in greater detail below are at this
It can be viewed as a part of the subject matter of the disclosure in the case that the design of sample is not conflicting.In addition, required guarantor
All combinations of the theme of shield are considered as a part of the subject matter of the disclosure.
Can be more fully appreciated from the following description in conjunction with attached drawing present invention teach that the foregoing and other aspects, reality
Apply example and feature.The features and/or benefits of other additional aspects such as illustrative embodiments of the invention will be below
Description in it is obvious, or learnt in practice by the specific embodiment instructed according to the present invention.
Detailed description of the invention
Attached drawing is not intended to drawn to scale.In the accompanying drawings, identical or nearly identical group each of is shown in each figure
It can be indicated by the same numeral at part.For clarity, in each figure, not each component part is labeled.
Now, example will be passed through and the embodiments of various aspects of the invention is described in reference to the drawings, in which:
Fig. 1 is of the invention for improving the flow diagram for setting hydrogen roll compacting technique of increasing material manufacturing titanium alloy tissue.
Specific embodiment
In order to better understand the technical content of the present invention, special to lift specific embodiment and institute's accompanying drawings is cooperated to be described as follows.
Various aspects with reference to the accompanying drawings to describe the present invention in the disclosure, shown in the drawings of the embodiment of many explanations.
It is not intended to cover all aspects of the invention for embodiment of the disclosure.It should be appreciated that a variety of designs and reality presented hereinbefore
Those of apply example, and describe in more detail below design and embodiment can in many ways in any one come it is real
It applies, this is because conception and embodiment disclosed in this invention are not limited to any embodiment.In addition, disclosed by the invention one
A little aspects can be used alone, or otherwise any appropriately combined use with disclosed by the invention.
It is according to the present invention disclose it is a kind of set hydrogen+roll compacting process for improve increasing material manufacturing titanium alloy tissue, lead to
It crosses after preposition titanium alloy powder sets hydrogen processing and obtains hydrogenated titanium alloy powder, carry out increasing material manufacturing using hydrogenated titanium alloy powder
After+successively roll compacting obtains titanium alloy workpiece, then solution treatment is carried out to workpiece, finally removes the titanium alloy workpiece after solid solution
Hydrogen heat treatment and annealing, to improve increasing material manufacturing titanium alloy microstructure.
The disclosure sets hydrogen+roll compacting process, on the one hand has higher solubility using hydrogen in titanium alloy beta phase, at this
Temperature range is built into the hydrogen of different proportion, and hydrogen content difference titanium alloy powder can be obtained.Existed during 3D printing using hydrogen
Fusing and the precipitation of process of setting hydride promote forming core and constitutional supercooling various aspects in molten bath to promote forming core with decomposition, from
And refine the crystal grain of printing tissue；On the other hand, during increasing material manufacturing, to the layer-by-layer roll compacting of metal deposition layer, roll compacting is utilized
Increase the consistency of material material, while increase the defects of roll compacting can cause the dislocation of metal deposition layer, in next layer of print procedure,
Since defect reduces forming core energy, nucleation rate can be improved, so that further refinement improves tissue；Finally by passing through vacuum annealing
Interim alloy element hydrogen is removed, avoids the change of the chemical component of final material, while refining and changing in the process using hydrogen
The defects of kind printout tissue and roll compacting are by increasing dislocation reduces forming core energy, improves nucleation rate；Interaction between them, which reaches, to be changed
Kind tissue does not change the purpose of alloying component.
As shown in connection with fig. 1, as exemplary implementation of the invention, aforementioned specific implementation process includes:
Step 1 carries out titanium alloy powder to set hydrogen processing, and titanium alloy powder is set in hydrogen heat-treatment furnace as tubular type, point
Layer powdering, every layer of powdering thickness 2-8mm is uniform to guarantee to set hydrogen ingredient, 1.5 × 10-3Pa is evacuated to, with 10-20 DEG C/min
Speed be heated to 700 DEG C -800 DEG C, keep the temperature 10~30min, be filled with 0.1% according to the weight percent of titanium alloy powder~
0.8% hydrogen keeps the temperature 1-4h, is then cooled to room temperature with 5~15 DEG C/min to get hydrogenated titanium alloy powder is arrived；
Step 2 will set the titanium alloy powder after hydrogen and be used for increasing material manufacturing, obtain titanium alloy workpiece, wherein powdering technique and
Powder feeding technique can be with, such as:
Powdering technique: 20 μm~80 μm of powdering thickness, laser power 200W~500W；1~15m/s of scanning speed.
Powder feeding technique: powder feeding 0.2-5r/min, laser power 1500W~8000W, scanning speed 1-30mm/s.
Step 3, using digital control system control roll titanium alloy metal deposition layer is rolled, rolling reduction be 10~
50%；
Step 4 repeats step 2,3 until printout is completed to print, and in rolling, requirement rolls under 0.4mm amount of rolling misses
Difference control is in 0.01mm；
Titanium alloy after increasing material manufacturing is carried out solution treatment, heat treatment process are as follows: put titanium alloy workpiece by step 5
In heat-treatment furnace, the speed of 10-20 DEG C/min is heated to Tp DEG C (phase transition temperature)+10 DEG C, keeps the temperature 20min~40min, then quenches
Fire；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 6；Put titanium alloy into vacuum heat treatment
In furnace, it is evacuated to 1.5 × 10-3Pa, is heated to 700 DEG C -800 DEG C with the speed of 10-20 DEG C/min, vacuum degree is higher than 3 in furnace
× 10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min.
The specific technological parameter of present embodiment can use corresponding technique according to the difference of titanium alloy type.
For the ease of better understanding, below with reference to specific example, invention is further explained, metal powder with
For TC4, but titanium alloy powder type is without being limited thereto, and the content of present invention is without being limited thereto.
[implementing one]
Step 1 carries out titanium alloy powder to set hydrogen processing, and titanium alloy powder is set in hydrogen heat-treatment furnace as tubular type, point
Layer powdering, every layer of powdering thickness 3mm is uniform to guarantee to set hydrogen ingredient, 1.5 × 10-3Pa is evacuated to, with 10-20 DEG C/min's
Speed is heated to 700 DEG C -800 DEG C, keeps the temperature 10~30min, 0.2% hydrogen is filled with according to the weight percent of titanium alloy powder
Gas keeps the temperature 2h, is then cooled to room temperature with 10 DEG C/min to get hydrogenated titanium alloy powder is arrived；
Step 2 will set the titanium alloy powder after hydrogen and be used for increasing material manufacturing, obtains titanium alloy workpiece, 40 μm of powdering thickness, swashs
Optical power 300W；Scanning speed 5m/s.
Step 3 rolls titanium alloy metal deposition layer using digital control system control roll, and rolling reduction is
15%；
Step 4 repeats step 2,3 until printout is completed to print, and in rolling, requirement rolls under 0.4mm amount of rolling misses
Difference control is in 0.01mm；
Titanium alloy after increasing material manufacturing is carried out solution treatment, heat treatment process are as follows: put titanium alloy workpiece by step 5
In heat-treatment furnace, the speed of 10-20 DEG C/min is heated to Tp DEG C (phase transition temperature)+10 DEG C, keeps the temperature 20min~40min, then quenches
Fire；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 6；Put titanium alloy into vacuum heat treatment
In furnace, it is evacuated to 1.5 × 10-3Pa, is heated to 700 DEG C -800 DEG C with the speed of 10-20 DEG C/min, vacuum degree is higher than 3 in furnace
× 10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min.
The specific technological parameter of present embodiment can use corresponding technique according to the difference of titanium alloy type.
[implementing two]
Step 1 carries out titanium alloy powder to set hydrogen processing, and titanium alloy powder is set in hydrogen heat-treatment furnace as tubular type, point
Layer powdering, every layer of powdering thickness 4mm is uniform to guarantee to set hydrogen ingredient, 1.5 × 10-3Pa is evacuated to, with 10-20 DEG C/min's
Speed is heated to 700 DEG C -800 DEG C, keeps the temperature 10~30min, 0.3% hydrogen is filled with according to the weight percent of titanium alloy powder
Gas keeps the temperature 3h, is then cooled to room temperature with 10 DEG C/min to get hydrogenated titanium alloy powder is arrived；
Step 2, step 2 will set the titanium alloy powder after hydrogen and be used for increasing material manufacturing, obtain titanium alloy workpiece, powdering thickness
50 μm, laser power 350W；Scanning speed 5m/s.
Step 3 rolls titanium alloy metal deposition layer using digital control system control roll, and rolling reduction is
20%；
Step 4 repeats step 2,3 until printout is completed to print, and in rolling, requirement rolls under 0.4mm amount of rolling misses
Difference control is in 0.01mm；
Titanium alloy after increasing material manufacturing is carried out solution treatment, heat treatment process are as follows: put titanium alloy workpiece by step 5
In heat-treatment furnace, the speed of 10-20 DEG C/min is heated to Tp DEG C (phase transition temperature)+10 DEG C, keeps the temperature 20min~40min, then quenches
Fire；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 6；Put titanium alloy into vacuum heat treatment
In furnace, it is evacuated to 1.5 × 10-3Pa, is heated to 700 DEG C -800 DEG C with the speed of 10-20 DEG C/min, vacuum degree is higher than 3 in furnace
× 10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min.
The specific technological parameter of present embodiment can use corresponding technique according to the difference of titanium alloy type.
[implementing three]
Step 1 carries out titanium alloy powder to set hydrogen processing, and titanium alloy powder is set in hydrogen heat-treatment furnace as tubular type, point
Layer powdering, every layer of powdering thickness 4mm is uniform to guarantee to set hydrogen ingredient, 1.5 × 10-3Pa is evacuated to, with 10-20 DEG C/min's
Speed is heated to 700 DEG C -800 DEG C, keeps the temperature 10~30min, 0.5% hydrogen is filled with according to the weight percent of titanium alloy powder
Gas keeps the temperature 3.5h, is then cooled to room temperature with 15 DEG C/min to get hydrogenated titanium alloy powder is arrived；
Step 2 will set the titanium alloy powder after hydrogen and be used for increasing material manufacturing, obtains titanium alloy workpiece, 60 μm of powdering thickness, swashs
Optical power 400W；Scanning speed 8m/s.
Step 3 rolls titanium alloy metal deposition layer using digital control system control roll, and rolling reduction is
35%；
Step 4 repeats step 2,3 until printout is completed to print, and in rolling, requirement rolls under 0.4mm amount of rolling misses
Difference control is in 0.01mm；
Titanium alloy after increasing material manufacturing is carried out solution treatment, heat treatment process are as follows: put titanium alloy workpiece by step 5
In heat-treatment furnace, the speed of 10-20 DEG C/min is heated to Tp DEG C (phase transition temperature)+10 DEG C, keeps the temperature 20min~40min, then quenches
Fire；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 6；Put titanium alloy into vacuum heat treatment
In furnace, it is evacuated to 1.5 × 10-3Pa, is heated to 700 DEG C -800 DEG C with the speed of 10-20 DEG C/min, vacuum degree is higher than 3 in furnace
× 10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min.
The specific technological parameter of present embodiment can use corresponding technique according to the difference of titanium alloy type.
[implementing four]
Step 1 carries out titanium alloy powder to set hydrogen processing, and titanium alloy powder is set in hydrogen heat-treatment furnace as tubular type, point
Layer powdering, every layer of powdering thickness 5mm is uniform to guarantee to set hydrogen ingredient, 1.5 × 10-3Pa is evacuated to, with 10-20 DEG C/min's
Speed is heated to 700 DEG C -800 DEG C, keeps the temperature 10~30min, 0.6% hydrogen is filled with according to the weight percent of titanium alloy powder
Gas keeps the temperature 4h, is then cooled to room temperature with 10 DEG C/min to get hydrogenated titanium alloy powder is arrived；
Step 2 will set the titanium alloy powder after hydrogen and be used for increasing material manufacturing, obtain titanium alloy workpiece, powder feed rate 3r/min,
Laser power 1600W, scanning speed 15mm/s.
Step 3 rolls titanium alloy metal deposition layer using digital control system control roll, and rolling reduction is
45%；
Step 4 repeats step 2,3 until printout is completed to print, and in rolling, requirement rolls under 0.4mm amount of rolling misses
Difference control is in 0.01mm；
Titanium alloy after increasing material manufacturing is carried out solution treatment, heat treatment process are as follows: put titanium alloy workpiece by step 5
In heat-treatment furnace, the speed of 10-20 DEG C/min is heated to Tp DEG C (phase transition temperature)+10 DEG C, keeps the temperature 20min~40min, then quenches
Fire；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 6；Put titanium alloy into vacuum heat treatment
In furnace, it is evacuated to 1.5 × 10-3Pa, is heated to 700 DEG C -800 DEG C with the speed of 10-20 DEG C/min, vacuum degree is higher than 3 in furnace
× 10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min.
The specific technological parameter of present embodiment can use corresponding technique according to the difference of titanium alloy type.
Mechanical experimental results are shown in Table 1；
The comparison of 1 mechanical property of table
In material increasing field, its thermodynamics for having its source in metallurgical process of formation of column crystal and coarse original grain is dynamic
Power problem, extraordinary metallurgy condition and cyclic deposition in the small molten bath of increasing material manufacturing process cause temperature and constitutional supercooling insufficient,
And non-spontaneous nucleation mass point reduction is key problem.Above method utilizes solubility of the hydrogen in titanium alloy, to titanium alloy powder
It carries out setting hydrogen processing.During 3D printing, on the one hand using set hydrogen promote elements diffusion and increase liquid/solid Interface composition mistake
It is cold；Circulation of melt deposition process hydride is formed and is decomposed, sets hydrogen reduction resistance of deformation and promote dislocation motion and then form change
Shape defect promotes non-spontaneous forming core；On the other hand using successively to the roll compacting of metal deposition layer, cause the change of metal deposition layer
Shape improves the consistency of printout, meanwhile, the defects of roll compacting introduces dislocation in sedimentary, this will reduce forming core energy, and improve shape
Core rate, in the small molten bath of next layer of print procedure, presence the defects of dislocation can refine printing layer tissue；Pass through above two
The factor reciprocation of a aspect, to realize the essence of metallurgy control and the transformation of column crystal/equiax crystal to increasing material manufacturing tissue
Quasi- control.
Since the intensity of alloy material and the relationship of crystal particle scale meet Hall-Petch relationship, crystal grain is thinner, alloy
Intensity is higher；And only crystal grain refinement, the intensity and plasticity of material could be improved simultaneously.The embodiment stated before this invention
In, the merging of hydrogen and layer-by-layer roll compacting processing very effective refinement crystal grain, improvement tissue can improve material in print procedure
Performance；And the ingredient of titanium alloy is not changed by last dehydrogenation.
Although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention.Skill belonging to the present invention
Has usually intellectual in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Cause
This, the scope of protection of the present invention is defined by those of the claims.
Claims (6)
1. a kind of set hydrogen roll compacting combination process for improve increasing material manufacturing titanium alloy tissue, which is characterized in that including following steps
It is rapid:
Step 1, titanium alloy powder carry out setting hydrogen processing: titanium alloy powder be placed in tubular type and is set in hydrogen heat-treatment furnace, powdering is layered,
Every layer of powdering thickness 2-8mm, is evacuated to 1.5 × 10-3Pa is heated to 700 DEG C -800 DEG C with the speed of 10-20 DEG C/min, protects
10~30min of temperature is filled with 0.1%~0.8% hydrogen according to the weight percent of titanium alloy powder, 1-4h is kept the temperature, then with 5
The speed of~15 DEG C/min is cooled to room temperature to arrive hydrogenated titanium alloy powder；
Step 2 will set the titanium alloy powder after hydrogen and be used for increasing material manufacturing and carries out workpiece printing, form titanium alloy metal deposition layer；
Step 3 rolls the titanium alloy metal deposition layer that step 2 is formed using digital control system control roll；
Step 4 repeats the successively printing of step 2,3 and rolling, until workpiece is completed to print；
Titanium alloy workpiece after increasing material manufacturing is carried out solution treatment by step 5, comprising: puts titanium alloy workpiece into heat-treatment furnace
Interior, the speed of 10-20 DEG C/min is heated to Tp DEG C+10 DEG C, keeps the temperature 20min~40min, then quenches, and wherein Tp DEG C is phase transformation
Temperature；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 6, specifically includes: titanium alloy workpiece is put into very
In empty heat-treatment furnace, it is evacuated to 1.5 × 10-3Pa is heated to 700 DEG C -800 DEG C with the speed of 10-20 DEG C/min, then in furnace
After interior vacuum degree reaches setting value, held for some time is finally cooled to room temperature.
2. according to claim 1 set hydrogen roll compacting combination process, feature for improve increasing material manufacturing titanium alloy tissue
It is, in step 6, when vacuum degree is higher than 3 × 10 in furnace-3When Pa, 2h~4h is kept the temperature, is then cooled to 5~15 DEG C/min
Room temperature.
3. according to claim 1 or 2 set hydrogen roll compacting combination process for improve increasing material manufacturing titanium alloy tissue, special
Sign is, in the operation of rolling of step 4, requires to roll control errors under 0.4mm amount of rolling in rolling in 0.01mm.
4. according to claim 1 set hydrogen roll compacting combination process, feature for improve increasing material manufacturing titanium alloy tissue
It is, in step 2, the printing of increasing material manufacturing workpiece is carried out using powdering technique or powder feeding technique.
5. according to claim 1 set hydrogen roll compacting combination process, feature for improve increasing material manufacturing titanium alloy tissue
It is, in step 3 operation of rolling, rolling reduction is controlled 10~50%.
6. according to claim 1 set hydrogen roll compacting combination process, feature for improve increasing material manufacturing titanium alloy tissue
It is, the increasing material manufacturing printing technology in the step 2 selects one of following powdering techniques or powder feeding technique:
Powdering technique: 20 μm~80 μm of powdering thickness, laser power 200W~500W；1~15m/s of scanning speed；
Powder feeding technique: powder feed rate 0.2-5r/min, laser power 1500W~8000W, scanning speed 1-30mm/s.
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| PCT/CN2019/093540 WO2020011027A1 (en) | 2018-07-11 | 2019-06-28 | Hydrogenation-roll compacting composite process for improving titanium alloy structure in additive manufacturing |
| JP2021500883A JP7020742B2 (en) | 2018-07-11 | 2019-06-28 | Hydrogenated rolling composite method to improve the titanium alloy structure of laminated molding |
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