CN108580874B - Hydrogen processing method is set for improve increasing material manufacturing titanium alloy microstructure - Google Patents
Hydrogen processing method is set for improve increasing material manufacturing titanium alloy microstructure Download PDFInfo
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Abstract
The invention belongs to increases material manufacturing technology fields, it is proposed that hydrogen processing method is set by a kind of increasing material manufacturing titanium alloy microstructure that improves, the forming core in molten bath is promoted in fusing and the precipitation and decomposition of process of setting hydride based on hydrogen in print procedure using hydrogenated titanium alloy powder, and constitutional supercooling various aspects promote forming core, the crystal grain of refinement printing tissue, interim alloy element hydrogen is removed by vacuum annealing again, avoid the change of the chemical component of final material, being refined in the process using hydrogen simultaneously improves printout tissue, and achieving the purpose that, which improves tissue, does 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 processing method is set for improve increasing material manufacturing titanium alloy microstructure.
Background technique
The Heating style used during increasing material manufacturing includes laser, electric arc, plasma, electron beam etc., and is being increased
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, domestic and foreign scholars have carried out a large amount of pilot studys, from increasing material manufacturing technique itself, add
Add reinforcing particle refinement crystal grain and carry out the regulation of microstructure using magnetic field, electric field, ultrasound, laser, micro- forging etc., it is intended to
Solve the problems, such as increasing material manufacturing metallurgy:
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
The method of Ti3Al alloy microstructure, comprising: one, to casting Ti3Al alloy carry out heat and other static pressuring processes processing；Two, by heat etc.
Ti3Al alloy after static pressure process carries out setting hydrogen processing；Three, treated that Ti3Al alloy is dissolved, timeliness for opposed hydrogen
Processing；Four, vacuum annealing process is finally carried out.Conducive to heat and other static pressuring processes, the hole etc. repaired in casting Ti3Al alloy is lacked
It falls into, improves the consistency of alloy；On the other hand the reversible alloying effect using hydrogen in casting Ti3Al alloy and each again
Kind phase transformation, the microstructure of refinement casting Ti3Al alloy, makes up coarse grains and adversely affects to alloy property bring.But it is same
The effect of sample having a disadvantage in that merely with hydrogen in TC4 alloy follow-up heat treatment process refinement crystal grain, and cannot followed using hydrogen
Ring melt deposition process promotes elements diffusion and increases the supercooling of liquid/solid Interface composition；Hydride forms and decomposes, sets hydrogen reduction change
Shape drag simultaneously promotes dislocation motion and then forms deformation defect, and from multidimensional, multi-angle promotes non-spontaneous forming core, refines the work of crystal grain
With.
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 processing method, purport are set for improve increasing material manufacturing titanium alloy microstructure it is an object of that present invention to provide a kind of
By the processing to increasing material manufacturing printout, interim alloy element hydrogen is removed by vacuum annealing, avoids final material
Chemical component change, while using hydrogen refine in the process improve printout tissue, and reach improvement tissue do not change
The purpose of alloying component.
Above-mentioned purpose of the invention realizes that dependent claims are to select else or have by the technical characteristic of independent claims
The mode of benefit develops the technical characteristic of independent claims.
To reach above-mentioned purpose, the present invention proposes that a kind of hydrogen of setting for improving increasing material manufacturing titanium alloy microstructure is handled
Method, comprising:
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, is evacuated to 1.5 × 10-3Pa, with 10-20 DEG C/min's
Speed is heated to 700 DEG C -800 DEG C, keeps the temperature 10~30min, 0.1% is filled with 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.
Titanium alloy after increasing material manufacturing is carried out solution treatment, heat treatment process are as follows: put titanium alloy workpiece by step 3
In heat-treatment furnace, the speed of 10-20 DEG C/min is heated to TpDEG C+10 DEG C of (phase transition temperature) keeps the temperature 20min~40min, then quenches
Fire；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 4；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, and 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.
Hydrogen processing method is set by improvement increasing material manufacturing titanium alloy microstructure of the invention, is particularly advantageous in that benefit
Molten bath is promoted in fusing and the precipitation and decomposition of process of setting hydride based on hydrogen in print procedure with hydrogenated titanium alloy powder
Interior forming core and constitutional supercooling various aspects promote forming core, and the crystal grain of refinement printing tissue further will be interim by vacuum annealing
Alloy element hydrogen removes, and avoids the change of the chemical component of final material, while refining improvement printing in the process using hydrogen
Part tissue, and achieve the purpose that improving tissue does not change alloying component.
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 the flow diagram for setting hydrogen processing method of improvement increasing material manufacturing titanium alloy microstructure of the invention.
Fig. 2 is the microcosmic schematic diagram that the microscopic structure during increasing material manufacturing is carried out using the titanium alloy powder for setting hydrogen.
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 be intended to improve increasing material manufacturing titanium alloy microstructure set hydrogen processing method, pass through
Preposition titanium alloy powder obtains hydrogenated titanium alloy powder after setting hydrogen processing, carries out increasing material manufacturing using hydrogenated titanium alloy powder and obtains
To after titanium alloy workpiece, then to workpiece carry out solution treatment, finally by after solid solution titanium alloy workpiece carry out dehydrogenation heat treatment and
Annealing, to improve increasing material manufacturing titanium alloy microstructure.
The disclosure sets hydrogen processing method, has higher solubility using hydrogen in titanium alloy beta phase, sets within this temperature range
Hydrogen content difference titanium alloy powder can be obtained in the hydrogen for entering different proportion.It in fusing and was solidified during 3D printing using hydrogen
The precipitation of journey hydride promotes forming core with the forming core and constitutional supercooling various aspects decomposed in promotion molten bath, to refine printing group
The crystal grain knitted avoids the chemical component of final material finally by removing interim alloy element hydrogen by vacuum annealing
Change, while refining improvement printout tissue in the process using hydrogen, and reaches the mesh that improvement tissue does not change alloying component
's.
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, is evacuated to 1.5 × 10-3Pa, with 10-20 DEG C/min's
Speed is heated to 700 DEG C -800 DEG C, keeps the temperature 10~30min, 0.1% is filled with 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.
Titanium alloy after increasing material manufacturing is carried out solution treatment, heat treatment process are as follows: put titanium alloy workpiece by step 3
In heat-treatment furnace, the speed of 10-20 DEG C/min is heated to TpDEG C+10 DEG C of (phase transition temperature) keeps the temperature 20min~40min, then quenches
Fire；
Titanium alloy workpiece after solid solution is carried out+dehydrogenation heat treatment of annealing by step 4；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, and 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.
As a result, in the crystal grain of refinement printing tissue by the above process, the interim alloy for finally introducing 3D printing process
Change element hydrogen to remove, avoids the change of the chemical component of final material, while refining improvement printout group in the process using hydrogen
It knits, and achievees the purpose that improving tissue does not change alloying component.
For the ease of better understanding, below with reference to specific example, invention is further explained, and bronze end is with TC4
For, but titanium alloy powder type is without being limited thereto, and the content of present invention is without being limited thereto.
[implementing one]
(1), TC4 titanium alloy powder is carried out setting hydrogen processing, titanium alloy powder is set in hydrogen heat-treatment furnace as tubular type, point
Layer powdering, every layer of powdering thickness 2mm is uniform to guarantee to set hydrogen ingredient, is evacuated to 1.5 × 10-3Pa, 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 5~15 DEG C/min to get hydrogenated titanium alloy powder is arrived；
(2), the titanium alloy powder after hydrogen will be set and be used for increasing material manufacturing, 30 μm of powdering thickness, laser power 300W；Scanning speed
Spend 5m/s.
(3), the titanium alloy after increasing material manufacturing is subjected to solution treatment, heat treatment process are as follows: put titanium alloy workpiece into heat
In treatment furnace, the speed of 10-20 DEG C/min is heated to TpDEG C+10 DEG C of (phase transition temperature) keeps the temperature 20min~40min, then quenches
Fire, sampling and testing mechanical property.
(4), the titanium alloy workpiece after solid solution is subjected to+dehydrogenation heat treatment of annealing；Put titanium alloy into vacuum heat treatment furnace
It is interior, 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, in furnace vacuum degree be higher than 3 ×
10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min, sampling and testing mechanical property.
This implements specific technological parameter can be according to the difference of titanium alloy type using corresponding technological parameter.
[implementing two]
(1), TC4 titanium alloy powder is carried out setting hydrogen processing, 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, is evacuated to 1.5 × 10-3Pa, with the speed of 10-20 DEG C/min
Degree is heated to 700 DEG C -800 DEG C, keeps the temperature 10~30min, 0.4% hydrogen is filled with according to the weight percent of titanium alloy powder,
3h is kept the temperature, is then cooled to room temperature with 5~15 DEG C/min to get hydrogenated titanium alloy powder is arrived；
(2), the titanium alloy powder after hydrogen will be set and be used for increasing material manufacturing, 40 μm of powdering thickness, laser power 400W；Scanning speed
Spend 8m/s.
(3), the titanium alloy after increasing material manufacturing is subjected to solution treatment, heat treatment process are as follows: put titanium alloy workpiece into heat
In treatment furnace, the speed of 10-20 DEG C/min is heated to TpDEG C+10 DEG C of (phase transition temperature) keeps the temperature 20min~40min, then quenches
Fire, sampling and testing mechanical property.
(4), the titanium alloy workpiece after solid solution is subjected to+dehydrogenation heat treatment of annealing；Put titanium alloy into vacuum heat treatment furnace
It is interior, 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, in furnace vacuum degree be higher than 3 ×
10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min, sampling and testing mechanical property.
The specific technological parameter of present embodiment should use corresponding technique according to the difference of titanium alloy type.
[implementing three]
1), TC4 titanium alloy powder is carried out to set hydrogen processing, 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, is evacuated to 1.5 × 10-3Pa, with the speed of 10-20 DEG C/min
Degree 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,
4h is kept the temperature, is then cooled to room temperature with 5~15 DEG C/min to get hydrogenated titanium alloy powder is arrived；
(2), the titanium alloy powder after hydrogen will be set and be used for increasing material manufacturing, 20 μm of powdering thickness, laser power 300W；Scanning speed
Spend 7m/s.
(3), the titanium alloy after increasing material manufacturing is subjected to solution treatment, heat treatment process are as follows: put titanium alloy workpiece into heat
In treatment furnace, the speed of 10-20 DEG C/min is heated to TpDEG C+10 DEG C of (phase transition temperature) keeps the temperature 20min~40min, then quenches
Fire, sampling and testing mechanical property.
(4), the titanium alloy workpiece after solid solution is subjected to+dehydrogenation heat treatment of annealing；Put titanium alloy into vacuum heat treatment furnace
It is interior, 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, in furnace vacuum degree be higher than 3 ×
10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min, sampling and testing mechanical property.
The specific technological parameter of present embodiment can use corresponding technique according to the difference of titanium alloy type.
[implementing four]
1), TC4 titanium alloy powder is carried out to set hydrogen processing, titanium alloy powder is set in hydrogen heat-treatment furnace as tubular type, point
Layer powdering, every layer of powdering thickness 8mm is uniform to guarantee to set hydrogen ingredient, is evacuated to 1.5 × 10-3Pa, with the speed of 10-20 DEG C/min
Degree is heated to 700 DEG C -800 DEG C, keeps the temperature 10~30min, 0.8% hydrogen is filled with according to the weight percent of titanium alloy powder,
4h is kept the temperature, is then cooled to room temperature with 5~15 DEG C/min to get hydrogenated titanium alloy powder is arrived；
(2), the titanium alloy powder after hydrogen will be set and be used for increasing material manufacturing, 70 μm of powdering thickness, laser power 500W；Scanning speed
Spend 10m/s.
(3), the titanium alloy after increasing material manufacturing is subjected to solution treatment, heat treatment process are as follows: put titanium alloy workpiece into heat
In treatment furnace, the speed of 10-20 DEG C/min is heated to TpDEG C+10 DEG C of (phase transition temperature) keeps the temperature 20min~40min, then quenches
Fire, sampling and testing mechanical property.
(4), the titanium alloy workpiece after solid solution is subjected to+dehydrogenation heat treatment of annealing；Put titanium alloy into vacuum heat treatment furnace
It is interior, 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, in furnace vacuum degree be higher than 3 ×
10-3Pa is kept the temperature 2h~4h, is then cooled to room temperature with 5~15 DEG C/min, sampling and testing mechanical property.
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 embodiment 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.It can promote elements diffusion and increase liquid/solid Interface composition supercooling by setting hydrogen；Circulation of melt deposition process hydrogen
Compound is formed and is decomposed, sets hydrogen reduction resistance of deformation and promote dislocation motion and then form deformation defect, and from multidimensional, multi-angle promotees
Into non-spontaneous forming core, to realize to the metallurgy control of increasing material manufacturing tissue and being precisely controlled for column crystal/equiax crystal transformation.By
Meet Hall-Petch relationship in the intensity of alloy material and the relationship of crystal particle scale, crystal grain is thinner, and the intensity of alloy is higher；
And only crystal grain refinement, the intensity and plasticity of material could be improved simultaneously.In the embodiment stated before this invention, the merging of hydrogen
Very effective refinement crystal grain, improvement tissue material property can be improved in print procedure；And pass through last dehydrogenation
The ingredient of titanium alloy is not changed also.
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 processing method for improve increasing material manufacturing titanium alloy microstructure characterized by comprising
Step 1, titanium alloy powder carry out setting hydrogen processing, comprising: set in hydrogen heat-treatment furnace titanium alloy powder as tubular type, be layered
Then powdering is evacuated to 1.5 × 10-3Pa is heated to 700 DEG C -800 DEG C, 10~30min is kept the temperature, further according to titanium alloy powder
Weight percent be filled with the hydrogen of 0.1%~0.8wt.%, keep the temperature 1-4h, then cool to room temperature, obtain hydrogenated titanium alloy
Powder；Wherein, 700 DEG C -800 DEG C are heated to the speed of 10-20 DEG C/min when heating, with the speed of 5~15 DEG C/min when cooling
Degree is cooled to room temperature；
Step 2 will set the titanium alloy powder after hydrogen and be used for increasing material manufacturing, the titanium alloy workpiece after being printed；
Titanium alloy after increasing material manufacturing is carried out solution treatment, heat treatment process are as follows: put titanium alloy workpiece into hot place by step 3
It manages in furnace, the speed of 10-20 DEG C/min is heated to Tp+ 10 DEG C, 20min~40min is kept the temperature, wherein TpFor phase transition temperature, then quench
Fire；
Titanium alloy workpiece after solid solution is carried out dehydrogenation heat treatment by step 4, comprising: put quenched titanium alloy workpiece very into
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 keeps the temperature 2h~4h, then cools to room temperature, wherein when the titanium alloy workpiece after heat treatment is annealed, with 5
The speed of~15 DEG C/min is cooled to room temperature.
2. according to claim 1 set hydrogen processing method, feature for improve increasing material manufacturing titanium alloy microstructure
It is, in abovementioned steps 1, every layer of powdering thickness 2-8mm.
3. according to claim 1 set hydrogen processing method, feature for improve increasing material manufacturing titanium alloy microstructure
It is, the solution treatment of abovementioned steps 3 that there is different T according to different titanium alloysp, solid solubility temperature T is determined in solution treatmentp
℃+10℃。
4. according to claim 1 set hydrogen processing method, feature for improve increasing material manufacturing titanium alloy microstructure
It is, in abovementioned steps 1, the hydrogen of 0.1%~0.8wt.% is filled with according to the weight percent of titanium alloy powder, refers to and is filled with
It is equivalent to the hydrogen of 0.1~0.8wt.% of titanium alloy powder weight.
5. according to claim 1 set hydrogen processing method, feature for improve increasing material manufacturing titanium alloy microstructure
It is, the increasing material manufacturing of abovementioned steps 2, using one of powdering technique and powder feeding technique.
6. according to claim 1 set hydrogen processing method, feature for improve increasing material manufacturing titanium alloy microstructure
It is, the increasing material manufacturing technique of abovementioned steps 2 is one of following:
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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| CN111215624A (en) * | 2018-11-26 | 2020-06-02 | 南京工业大学 | Addition of B4Method for improving additive manufacturing titanium alloy microstructure through in-situ self-generation of C nano particles |
| EP3938553A4 (en) * | 2019-03-16 | 2022-11-30 | Praxis Powder Technology, Inc. | Microstructural improvements of titanium alloys |
| CN109877313A (en) * | 2019-04-19 | 2019-06-14 | 南京工业大学 | The mesh bag device of hydrogen processing is set for titanium alloy powder, preparation method and sets hydrogen treatment process |
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| CN113278901A (en) * | 2021-05-01 | 2021-08-20 | 上海交通大学 | Multi-cycle hydrogen-placing treatment method for grain refinement of titanium alloy plate |
| CN113430474B (en) * | 2021-07-20 | 2022-04-22 | 南京工业大学 | Process for improving additive manufacturing metallurgical structure of titanium alloy wire |
| CN116288090A (en) * | 2023-03-14 | 2023-06-23 | 南京工业大学 | Process for improving metallurgical structure of titanium alloy bar friction stir additive manufacturing |
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