CN116329549A - Preparation method of TC4 titanium alloy small die forging - Google Patents

Preparation method of TC4 titanium alloy small die forging Download PDF

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Publication number
CN116329549A
CN116329549A CN202211489910.1A CN202211489910A CN116329549A CN 116329549 A CN116329549 A CN 116329549A CN 202211489910 A CN202211489910 A CN 202211489910A CN 116329549 A CN116329549 A CN 116329549A
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powder
hydrogen
titanium alloy
die forging
treatment
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薛祥义
楚玉东
张晨辉
刘小花
邵博
张利军
吴天栋
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Xi'an Supercrystalline Technology Co ltd
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Xi'an Supercrystalline Technology Co ltd
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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
    • B22F3/02—Compacting only
    • B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
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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
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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
    • B22F3/02—Compacting only
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    • B22—CASTING; POWDER METALLURGY
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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
    • B22F3/10—Sintering only
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007—Atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • C22C1/0458—Alloys based on titanium, zirconium or hafnium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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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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    • 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
    • B22F2003/248—Thermal after-treatment
    • C—CHEMISTRY; METALLURGY
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    • C22C14/00—Alloys based on titanium
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Abstract

The invention relates to a preparation method of a TC4 titanium alloy small die forging, which comprises the following steps: selecting titanium hydride powder and Al-V intermediate alloy powder as raw materials, and uniformly mixing to obtain mixed powder; placing the mixed powder into a mould for compression molding, or carrying out cold isostatic pressing on the mixed powder to obtain a part green body; and (3) placing the part green compact into a vacuum sintering furnace for vacuum sintering treatment, and then performing thermal hydrogen treatment to obtain the TC4 titanium alloy small die forging. The method adopts mixed element powder as a raw material, and combines the traditional press forming, vacuum sintering and hot hydrogen treatment processing technology to prepare the TC4 titanium alloy die forging with uniform and fine microstructure and good mechanical property.

Description

Preparation method of TC4 titanium alloy small die forging
Technical Field
The invention belongs to the technical field of titanium alloy powder metallurgy, and relates to a preparation method of a TC4 titanium alloy small-sized die forging.
Background
The powder metallurgy technology is used as a near net forming technology, is particularly suitable for reducing the production cost of titanium and titanium alloy materials, and can save raw materials and shorten the processing flow. The powder metallurgy can be classified into powder metallurgy of mixed element powder and powder metallurgy of prealloyed powder according to the difference of raw material powder. The powder metallurgy part prepared from the prealloy powder has high density and good comprehensive mechanical property, but the preparation of the prealloy powder needs alloying smelting firstly, then forging and rolling into a casting bar with proper size, and finally atomizing or rotating electrode powder preparation, so that the production cost is high, and the production cost is contrary to the original aim of low cost. Powder metallurgy of mixed elemental powders is the most cost-effective route to processing. However, there are problems such as difficulty in alloying powder elements uniformly, low degree of densification of the material, and poor overall properties of the final part. In addition, in the powder metallurgy process, powder is firstly pressed into a blank, alloying and densification are realized through vacuum high-temperature sintering, and the high-temperature heating environment leads the microstructure of the part to be a coarse as-cast structure, so that the mechanical property of the part is deteriorated. Aiming at the problem of low density, the hot isostatic pressing procedure is added after sintering to improve the density of the blank; in order to solve the problem of coarse structure, a thermal mechanical working process such as forging is added after sintering to refine the structure of the blank. However, the addition of either hot isostatic pressing or thermomechanical processing steps will result in a significant increase in the cost of producing powder metallurgical parts.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a preparation method of a TC4 titanium alloy small die forging, which utilizes the characteristics of hydrogen in titanium and titanium alloy, adopts mixed element powder as a raw material, and combines the traditional press forming, vacuum sintering and hot hydrogen treatment processing technology to prepare the TC4 titanium alloy small die forging with uniform and fine microstructure and good mechanical property.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a preparation method of a TC4 titanium alloy small die forging comprises the following steps:
s1, selecting titanium hydride powder and Al-V intermediate alloy powder as raw materials, and uniformly mixing to obtain mixed powder;
s2, placing the mixed powder into a die for compression molding, or molding the mixed powder by adopting a cold isostatic pressing process to finally obtain a green part;
and S3, placing the part green compact into a vacuum sintering furnace for vacuum sintering treatment, and then performing thermal hydrogen treatment to obtain the TC4 titanium alloy small die forging.
Further, the granularity of the titanium hydride powder in the S1 is less than or equal to 45 mu m, the Al-V master alloy powder component is 60wt.% of Al and 40wt.% of V, and the granularity of the Al-V master alloy powder is less than or equal to 45 mu m.
Further, in the step S2, the pressure for pressing the mixed powder and the pressure for molding by adopting a cold isostatic pressing process are 200-400 Mpa, and the pressure is maintained for 15-20S.
Further, the vacuum sintering process in S3 specifically includes: continuously heating the temperature in the vacuum sintering furnace to 1100-1300 ℃, wherein the heating rate is 10 ℃/min, and preserving the temperature for 2-6 hours, so as to realize alloying of mixed element powder and densification of the green body.
Further, the thermal hydrogen treatment of S3 includes the following steps:
s31, placing the parts into a hydrogen placing furnace, vacuumizing, and raising the temperature in the hydrogen placing furnace and preserving heat;
s32, introducing high-purity hydrogen into the hydrogen placing furnace;
s33, performing heat treatment on the parts;
s34, completing the vacuum dehydrogenation treatment of the part.
Further, in the step S31, the parts are placed into a hydrogen placing furnace and vacuumized to 10 -3 ～10 -1 Pa, heating to 700-800 ℃, and preserving heat for 60-120 min.
Further, the hydrogen absorption amount is controlled to be 0.6 to 1.2wt.% in the S32;
further, the heat treatment of the part includes solution treatment and isothermal aging treatment of the part.
Further, the heat treatment of the parts specifically includes:
s331, maintaining the partial pressure of hydrogen, heating to 850-900 ℃, and preserving heat for 60-90 min to finish the solution treatment of the hydrogen-placed part;
s332, cooling to 550-650 ℃ at a cooling speed of 5 ℃/min, and preserving heat for 2-8 hours to finish isothermal aging treatment of the part after solid solution;
further, in the process of performing vacuum dehydrogenation treatment on the part in S34, vacuumizing to 10 -3 Pa, heating to 700-800 ℃, and preserving heat for 2-8 h.
Compared with the prior art, the invention has the following beneficial effects:
the preparation method selects TC4 titanium alloy with the most extensive application range, mainly aims at a small die forging piece, takes titanium hydride powder and Al-V intermediate alloy powder as raw materials, firstly mixes the powder, then performs compression molding and vacuum sintering densification, finally regulates and controls the structure and performance of the small die forging piece through hot hydrogen treatment, utilizes the hydrogen purification effect, the hydrogen activation effect and the hydrogen phase transformation effect, avoids the introduction of high-cost working procedures such as hot isostatic pressing, thermomechanical processing and the like, solves the problems of long production flow and high production cost of the small die forging piece of the titanium alloy in the traditional smelting forging processing route, and solves the problems of poor compactness, coarse structure and non-ideal performance of the small die forging piece of the titanium alloy in the traditional powder metallurgy route, and realizes the short-flow, low-cost and high-reliability manufacturing of the small die forging piece of the titanium alloy.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are not intended to represent all embodiments consistent with the invention. Rather, they are merely examples of methods consistent with aspects of the invention that are set forth in the following claims.
The present invention will be described in further detail with reference to examples for better understanding of the technical aspects of the present invention by those skilled in the art.
A preparation method of a TC4 titanium alloy small die forging comprises the following steps:
step 1, raw material preparation: titanium hydride powder and Al-V intermediate alloy powder are selected as raw materials, wherein the granularity of the titanium hydride powder is less than or equal to 45 mu m, the components of the Al-V intermediate alloy powder are 60wt.% of Al and 40wt.% of V, and the granularity of the Al-V intermediate alloy powder is less than or equal to 45 mu m.
Titanium hydride powder is selected as a raw material, and the content of oxygen in the raw material such as titanium sponge and the like produced in an extraction metallurgy link is reduced in consideration of the fact that the hydrogen element can reduce the bonding strength between the titanium element and the oxygen element, and meanwhile, metal or alloy powder in the powder metallurgy link is prevented from being polluted by interstitial elements such as the oxygen element and the like.
Step 2, mixing: mixing the raw materials uniformly to obtain mixed powder.
Step 3, press forming: and (3) putting the mixed powder into a mould for compression molding, or adopting a cold isostatic pressing process to mold the mixed powder, and finally obtaining a part green body, wherein the pressure for compressing the mixed powder and the pressure for molding by adopting the cold isostatic pressing process are both 200-400 Mpa, and the pressure is maintained for 15-20 s. Due to the brittleness of the titanium hydride powder, the titanium hydride powder is easy to break in the press forming link, so that the mold gap is easier to fill, and higher filling density and green strength can be obtained.
Step 4, vacuum sintering: and (3) placing the part green compact into a vacuum sintering furnace for vacuum sintering treatment, continuously heating the temperature in the vacuum sintering furnace to 1100-1300 ℃, keeping the temperature for 2-6 hours at a heating rate of 10 ℃/min, and realizing alloying of mixed element powder and densification of the green compact.
Step 5, heat hydrogen treatment:
placing the parts into a hydrogen placing furnace, and vacuumizing to 10 -3 ～10 -1 Pa, heating to 700-800 ℃, and preserving heat for 60-120 min;
high-purity hydrogen is introduced into the hydrogen placing furnace, and the hydrogen absorption amount is controlled to be 0.6-1.2 wt%;
maintaining the partial pressure of hydrogen, heating to 850-900 ℃, and preserving heat for 60-90 min to finish the solid solution treatment of the hydrogen-placed part;
cooling to 550-650 ℃ at a cooling speed of 5 ℃/min, and preserving heat for 2-8 hours to finish isothermal aging treatment of the parts after solid solution;
vacuum dehydrogenation treatment of the part is completed, and the part is vacuumized to 10 -3 Pa, heating to 700-800 ℃, preserving heat for 2-8 h, regulating and controlling the structure and performance through thermal hydrogen treatment, and obtaining the TC4 titanium alloy small die forging with the structure and performance meeting the requirements.
The hydrogen element can promote the diffusion of alloying elements, and the alloying degree and the compactness of the blank are obviously improved along with the change of the content of the hydrogen element in the vacuum sintering or dehydrogenation process; the hydrogen-induced phase change effect can refine coarse as-cast structure by hydride eutectoid decomposition or metastable equal-temperature decomposition during vacuum sintering, heat treatment and dehydrogenation.
The hydrogen element is used as a temporary alloying element, the content of the hydrogen element in the titanium alloy can be controlled through a reversible reaction of hydrogen-dehydrogenation, and meanwhile, the beneficial effects of the hydrogen element in a titanium and titanium alloy system are utilized by combining means of sintering, heat treatment and the like, so that the problems in the mixed element powder metallurgy process route in the prior art are overcome. In addition, the titanium hydride powder, the intermediate alloy powder and other element powder have low cost compared with prealloy powder, and meanwhile, the forming process route does not comprise high-cost processing links such as hot isostatic pressing, thermomechanical treatment and the like, and finally, alloy structure and performance are regulated and controlled through hot hydrogen treatment, so the preparation method provided by the invention has the advantages of short flow, low cost and reliable part structure and performance.
In addition, because the section thickness of the small die forging piece is smaller, the diffusion of hydrogen elements in titanium and titanium alloy is limited by distance, and only parts with smaller section size can ensure that the hydrogen elements are uniformly distributed in proper content.
The following description is made in connection with specific technical processes:
example 1:
step 1: raw material preparation, 9.8kg of titanium hydride powder with the granularity less than or equal to 45 mu m is weighed, and 1kg of Al-V master alloy powder (60 wt.% Al/40wt.% V) with the granularity less than or equal to 45 mu m is weighed.
Step 2: mixing, and mixing the raw materials to obtain mixed powder.
Step 3: and (3) performing compression molding, namely placing the mixed powder into a die, performing compression molding on the mixed powder on a press, controlling the compression pressure to be 200MPa, and maintaining the pressure for 20s to obtain a green part.
Step 4: vacuum sintering, namely placing the green part into a vacuum sintering furnace for vacuum sintering treatment: continuously heating to 1100 ℃, wherein the heating rate is 10 ℃/min, and preserving heat for 6 hours to finish alloying and densification.
Step 5: thermal hydrogen treatment
Placing the parts into a hydrogen placing furnace, and vacuumizing to 10 -1 Pa, heating to 700 ℃, and preserving heat for 120min;
introducing high-purity hydrogen and controlling the hydrogen absorption amount to be 1.2wt.%;
maintaining the partial pressure of hydrogen, heating to 850 ℃, and preserving heat for 90min to finish the solution treatment of the hydrogen-placed part;
cooling to 550 ℃ at a cooling speed of 5 ℃/min, and preserving heat for 8 hours to finish isothermal aging treatment of the parts after solid solution; vacuumizing to 10 -3 Pa, heating to 700 ℃, preserving heat for 8 hours, and completing vacuum dehydrogenation treatment of the part to obtain TC4 titanium alloy with the structure and performance meeting the requirementsGold small die forgings.
Example 2
Step 1: raw material preparation, 9.8kg of titanium hydride powder with the granularity less than or equal to 45 mu m is weighed, and 1kg of Al-V master alloy powder (60 wt.% Al/40wt.% V) with the granularity less than or equal to 45 mu m is weighed.
Step 2: mixing, namely mixing the raw materials in the step S1 to obtain mixed powder.
Step 3: and (3) performing press forming, namely placing the mixed powder into a rubber sheath for performing cold isostatic pressing forming, controlling the pressing pressure to be 400MPa, and maintaining the pressure for 15s to obtain a green part.
Step 4: vacuum sintering, namely placing the green part into a vacuum sintering furnace for vacuum sintering treatment: continuously heating to 1300 ℃, keeping the temperature for 2 hours at the heating rate of 10 ℃/min, and finishing alloying and densification.
Step 5: carrying out heat hydrogen treatment, namely carrying out heat hydrogen treatment on the small die forging subjected to vacuum sintering, and regulating and controlling the structure and performance: placing the parts into a hydrogen placing furnace, and vacuumizing to 10 -3 Pa, heating to 800 ℃, and preserving heat for 60min; introducing high-purity hydrogen and controlling the hydrogen absorption amount to be 0.8wt.%; maintaining the partial pressure of hydrogen, heating to 860 ℃, and preserving heat for 90min to finish the solution treatment of the hydrogen-placed part; cooling to 650 ℃ at a cooling speed of 5 ℃/min, and preserving heat for 2 hours to finish isothermal aging treatment of the parts after solid solution; vacuumizing to 10 -3 And (3) heating to 800 ℃ under Pa, preserving heat for 2 hours, and completing the vacuum dehydrogenation treatment of the part to obtain the TC4 titanium alloy small die forging with the structure and performance meeting the requirements.
Example 3
Step 1: raw material preparation, 9.8kg of titanium hydride powder with the granularity less than or equal to 45 mu m is weighed, and 1kg of Al-V master alloy powder (60 wt.% Al/40wt.% V) with the granularity less than or equal to 45 mu m is weighed.
Step 2: mixing, namely mixing the raw materials in the step S1 to obtain mixed powder.
Step 3: and (3) performing press forming, namely placing the mixed powder into a rubber sheath for performing cold isostatic pressing forming, controlling the pressing pressure to be 300MPa, and maintaining the pressure for 17 seconds to obtain a green part.
Step 4: vacuum sintering, namely placing the green part into a vacuum sintering furnace for vacuum sintering treatment: continuously heating to 1200 ℃, wherein the heating rate is 10 ℃/min, and preserving heat for 4 hours to finish alloying and densification.
Step 5: carrying out heat hydrogen treatment, namely carrying out heat hydrogen treatment on the small die forging subjected to vacuum sintering, and regulating and controlling the structure and performance: placing the parts in a hydrogen placing furnace, and vacuumizing to 6.67×10 -2 Pa, heating to 750 ℃, and preserving heat for 90min; introducing high-purity hydrogen and controlling the hydrogen absorption amount to be 0.6wt.%; maintaining the partial pressure of hydrogen, heating to 900 ℃, and preserving heat for 60min to finish the solution treatment of the hydrogen-placed part; cooling to 600 ℃ at a cooling speed of 5 ℃/min, and preserving heat for 5 hours to finish isothermal aging treatment of the parts after solid solution; vacuumizing to 10 -3 And (3) heating to 750 ℃ and preserving heat for 5 hours to finish the vacuum dehydrogenation treatment of the part to obtain the TC4 titanium alloy small die forging with the structure and performance meeting the requirements.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It will be understood that the invention is not limited to what has been described above and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (10)

1. The preparation method of the TC4 titanium alloy small die forging is characterized by comprising the following steps of:
s1, selecting titanium hydride powder and Al-V intermediate alloy powder as raw materials, and uniformly mixing to obtain mixed powder;
s2, placing the mixed powder into a die for compression molding, or molding the mixed powder by adopting a cold isostatic pressing process to finally obtain a green part;
and S3, placing the part green compact into a vacuum sintering furnace for vacuum sintering treatment, and then performing thermal hydrogen treatment to obtain the TC4 titanium alloy small die forging.
2. The method for producing a small die forging of TC4 titanium alloy according to claim 1, wherein the grain size of the titanium hydride powder in S1 is less than or equal to 45 μm, the Al-V master alloy powder composition is 60wt.% Al and 40wt.% V, and the Al-V master alloy powder grain size is less than or equal to 45 μm.
3. The method for manufacturing a small TC4 titanium alloy die forging according to claim 1, wherein the pressure for pressing the mixed powder in S2 and the pressure for forming by cold isostatic pressing are both 200-400 Mpa, and the pressure is maintained for 15-20S.
4. The method for manufacturing a small TC4 titanium alloy die forging according to claim 1, wherein said vacuum sintering process in S3 is specifically: continuously heating the temperature in the vacuum sintering furnace to 1100-1300 ℃, wherein the heating rate is 10 ℃/min, and preserving the temperature for 2-6 hours, so as to realize alloying of mixed element powder and densification of the green body.
5. The method for manufacturing a small die forging of TC4 titanium alloy according to claim 1, wherein the heat hydrogen treatment of S3 comprises the following steps:
s31, placing the parts into a hydrogen placing furnace, vacuumizing, and raising the temperature in the hydrogen placing furnace and preserving heat;
s32, introducing high-purity hydrogen into the hydrogen placing furnace;
s33, performing heat treatment on the parts;
s34, completing the vacuum dehydrogenation treatment of the part.
6. The method for manufacturing a small TC4 titanium alloy die forging according to claim 5, wherein the step S31 is to put the part into a hydrogen placing furnace and vacuumize the part to 10 -3 ～10 -1 Pa, heating to 700-800 ℃, and preserving heat for 60-120 min.
7. The method for manufacturing a small die forging of TC4 titanium alloy according to claim 5, wherein the hydrogen absorption amount is controlled to be 0.6-1.2 wt.% in S32.
8. The method of manufacturing a small die forging of TC4 titanium alloy as recited in claim 5, wherein said heat treating said parts includes solution treatment and isothermal aging treatment of said parts.
9. The method for manufacturing a small TC4 titanium alloy die forging according to claim 8, wherein said heat treatment of said components is specifically:
s331, maintaining the partial pressure of hydrogen, heating to 850-900 ℃, and preserving heat for 60-90 min to finish the solution treatment of the hydrogen-placed part;
s332, cooling to 550-650 ℃ at a cooling speed of 5 ℃/min, and preserving heat for 2-8 hours to finish isothermal aging treatment of the part after solid solution.
10. The method for manufacturing a small TC4 titanium alloy die forging according to claim 5, wherein in the step of performing vacuum dehydrogenation treatment on the part in S34, the vacuum is pumped to 10 -3 Pa, heating to 700-800 ℃, and preserving heat for 2-8 h.
CN202211489910.1A 2022-11-25 2022-11-25 Preparation method of TC4 titanium alloy small die forging Pending CN116329549A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117884618A (en) * 2023-12-29 2024-04-16 北京中科宏钛新材料科技有限公司 Medical titanium alloy femoral stem and powder forging short-flow preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117884618A (en) * 2023-12-29 2024-04-16 北京中科宏钛新材料科技有限公司 Medical titanium alloy femoral stem and powder forging short-flow preparation method thereof

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