CN104550963A - Method for realizing forming of titanium alloy powder by utilizing titanium hydride alloy powder - Google Patents
Method for realizing forming of titanium alloy powder by utilizing titanium hydride alloy powder Download PDFInfo
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- CN104550963A CN104550963A CN201410782222.3A CN201410782222A CN104550963A CN 104550963 A CN104550963 A CN 104550963A CN 201410782222 A CN201410782222 A CN 201410782222A CN 104550963 A CN104550963 A CN 104550963A
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Abstract
The invention discloses a method for realizing the forming of titanium alloy powder by utilizing titanium hydride alloy powder. The method comprises the steps of putting hydrogenated titanium alloy powder into a metal sheath, vacuumizing under high temperature after compaction, removing hydrogen content in alloy, carrying out hot isostatic pressing after seal welding, and realizing the forming of the titanium alloy. According to the method disclosed by the invention, the hydrogen content in the titanium hydride alloy powder is removed during a vacuumizing link of the metal sheath, the problem of dehydrogenation during a titanium hydride alloy forming process is solved, then the hot isostatic pressing forming is carried out to obtain the titanium alloy with small structure grains, the operation is simple, and the practicability is high.
Description
Technical field
The present invention is that a kind of titantium hydride alloy powder that utilizes realizes the shaping method of titanium alloy powder, belongs to field of powder metallurgy.
Background technology
Titanium alloy process has the features such as density is low, intensity is high, corrosion resistance is strong, is widely used in the field such as Aeronautics and Astronautics, chemical industry.The means such as the shaping main employing casting of traditional titanium alloy and forging, forged titanium alloy property is higher, but is difficult to realize complex component newly net forming, and stock utilization is low, casting method can obtain newly net forming titanium alloy member, but the method is difficult to avoid production casting flaw, and performance is on the low side; Powder metallurgy process can not only realize complex component near-net-shape, and the alloy structure crystal grain obtained is tiny, and density is high, has very high mechanical property.The powder that conventional method adopts aerosolization or rotating electrode process to prepare loads jacket to carry out high temperature insostatic pressing (HIP) and is shaped, the powder size of preparation is larger, alloy structure crystal grain after shaping is tiny not, and powder inside has blind bore hole, brings impact to shaped alloys performance.
The method utilizing titantium hydride alloy powder to realize titanium alloy shaping successfully avoid the problems referred to above.
Titantium hydride alloy powder is by titanium alloy block material is inserted hot environment, and pass into hydrogen, alloy inhales hydrogen in high temperature environments, due to hydrogen embrittlement effect, block titanium alloy is from internal cleavage, then by the crushing technology such as ball milling, pulverizer pulverizing, the titantium hydride alloy powder that granularity is tiny is prepared.
First, due to hydrogen embrittlement effect, the method can be easy to prepare the very tiny powder of granularity, carries out post forming, obtain alloy grain very tiny by this powder; Secondly, owing to passing through the powder process of hydrogen fragmentation, powder is multangular irregular particle, and inside does not have cap holes; And this powder process is simple, with low cost, be suitable for applying.Adopt titantium hydride alloy powder to be shaped, then under vacuum environment by back reaction dehydrogenation, obtain organizing that crystal grain is tiny, the titanium alloy member of uniform composition.
Summary of the invention
The present invention designs for above-mentioned prior art situation just and provides a kind of titantium hydride alloy powder that utilizes and realize the shaping method of titanium alloy powder, its objective is to obtain the titanium alloy powder shaped component organizing crystal grain more tiny.
The object of the invention is to be realized by following technical measures:
This kind utilizes titantium hydride alloy powder to realize the shaping method of titanium alloy powder, it is characterized in that: the method step is as follows:
1) powder is filled: be that the titantium hydride alloy powder of 0.1 ~ 20 micron loads in the metal capsule prepared by granularity, and make it closely knit by mechanical oscillation mode;
Described jacket is made up of pure titanium, stainless steel or mild steel;
2) dehydrogenation: jacket is put into heating furnace, and the vacuum tube stretched out is received on vaccum-pumping equipment, start to vacuumize, start heating when vacuum in stove reaches after below 3Pa, heating-up temperature is 400 DEG C ~ 800 DEG C, temperature retention time 5 ~ 50 hours;
3) block: when pinch off vacuum tube after vacuum to below 0.001Pa, and soldering and sealing is carried out to vacuum tube port;
4) high temperature insostatic pressing (HIP): jacket is put into hot isostatic apparatus and carry out hip treatment, hip temperature 850 ~ 1000 DEG C, pressure 90 ~ 120MPa, 1 ~ 4 hour time, is cooled to less than 300 DEG C and comes out of the stove.
5) jacket is removed: remove jacket by machining process or caustic solution, obtain the titanium alloy member of hip moulding.
Feature of the present invention utilizes titantium hydride alloy powder for raw material, and it is directly carried out Dehydroepiandrosterone derivative in metal capsule, and by follow-up jacket heat and other static pressuring processes, the shaping realizing titanium alloy is densified.The method realizes dehydrogenation by vacuumizing link at jacket, is different from conventional method and first prepares titanium alloy powder by hydrogenation-dehydrogenation, then carry out the thinking of post forming, decrease intermediate link, avoid the pollution of powder.And by hip moulding, obtain the titanium alloy organizing crystal grain tiny, simple to operate, practical.
Detailed description of the invention
Embodiment 1
The step of present embodiment is as follows:
1) the TC4 titanium powder of average grain diameter hydrogenation treatment obtained 3 microns, loads in the metal capsule prepared, and makes it closely knit by mechanical oscillation mode;
2) jacket is put into heating furnace, and receive on vaccum-pumping equipment by the vacuum tube stretched out, start to vacuumize, vacuum starts heating after reaching 1Pa, heating-up temperature is 800 DEG C, temperature retention time 5 hours;
3) pinch off vacuum tube after vacuum to 0.001Pa, and soldering and sealing port cross-sectional;
4) jacket is put into hot isostatic apparatus and carry out hip treatment, hip temperature 1000 DEG C, pressure 90MPa, 4 hours time, be cooled to 300 DEG C and come out of the stove.
5) remove jacket by machining process or caustic solution, obtain the titanium alloy member of hip moulding.
By the shaping titanic alloy machining tensile sample obtained, carry out room temperature tensile, density and crystallite dimension and detect, result is as follows:
| Tensile strength (MPa) | Percentage elongation (%) | Density (g/cm3) | Crystallite dimension (μm) |
| 1020 | 13.5 | 4.43 | 5 |
This example forms by selecting the titantium hydride alloy powder of granularity 3 microns, and hip temperature selects 1000 DEG C, and obtain alloy density 4.43g/cm3, alloy strength reaches 1020MPa, and plasticity reaches 13.5%.
Detailed description of the invention two
Step and the technological process of present embodiment are as follows:
1) the TC4 titanium powder of average grain diameter hydrogenation treatment obtained 9.5 microns, loads in the metal capsule prepared, and makes it closely knit by mechanical oscillation mode;
2) jacket is put into heating furnace, and receive on vaccum-pumping equipment by the vacuum tube stretched out, start to vacuumize, vacuum starts heating after reaching 1Pa, heating-up temperature is 400 DEG C, temperature retention time 50 hours;
3) pinch off vacuum tube after vacuum to 0.001Pa, and soldering and sealing port cross-sectional;
4) jacket is put into hot isostatic apparatus and carry out hip treatment, hip temperature 850 DEG C, pressure 120MPa, 1 hour time, be cooled to 300 DEG C and come out of the stove.
5) remove jacket by machining process or caustic solution, obtain the titanium alloy member of hip moulding.
By the shaping titanic alloy machining tensile sample obtained, carry out room temperature tensile, density and crystallite dimension and detect, result is as follows:
| Tensile strength (MPa) | Percentage elongation (%) | Density (g/cm3) | Crystallite dimension (μm) |
| 985 | 11.5 | 4.41 | 9 |
This example forms by selecting the titantium hydride alloy powder of granularity 9.5 microns, and hip temperature selects 850 DEG C, and obtain alloy density 4.41g/cm3, alloy strength reaches 985MPa, and plasticity reaches 11.5%.
Detailed description of the invention three
Step and the technological process of present embodiment are as follows:
1) the TC4 titanium powder of average grain diameter hydrogenation treatment obtained 10 microns, loads in the metal capsule prepared, and makes it closely knit by mechanical oscillation mode;
2) jacket is put into heating furnace, and receive on vaccum-pumping equipment by the vacuum tube stretched out, start to vacuumize, vacuum starts heating after reaching 1Pa, heating-up temperature is 550 DEG C, temperature retention time 10 hours;
3) pinch off vacuum tube after vacuum to 0.001Pa, and soldering and sealing port cross-sectional;
4) jacket is put into hot isostatic apparatus and carry out hip treatment, hip temperature 920 DEG C, pressure 100MPa, time 2 h, be cooled to 300 DEG C and come out of the stove.
5) remove jacket by machining process or caustic solution, obtain the titanium alloy member of hip moulding.
By the shaping titanic alloy machining tensile sample obtained, carry out room temperature tensile, density and crystallite dimension and detect, result is as follows:
| Tensile strength (MPa) | Percentage elongation (%) | Density (g/cm3) | Crystallite dimension (μm) |
| 992 | 10.7 | 4.39 | 13 |
This example forms by selecting the titantium hydride alloy powder of granularity 9.5 microns, and hip temperature selects 920 DEG C, and obtain alloy density 4.39g/cm3, alloy strength reaches 992MPa, and plasticity reaches 10.7%.
Claims (1)
1. utilize titantium hydride alloy powder to realize the shaping method of titanium alloy powder, it is characterized in that: the method step is as follows:
1) powder is filled: be that the titantium hydride alloy powder of 0.1 ~ 20 micron loads in the metal capsule prepared by granularity, and make it closely knit by mechanical oscillation mode;
Described jacket is made up of pure titanium, stainless steel or mild steel;
2) dehydrogenation: jacket is put into heating furnace, and the vacuum tube stretched out is received on vaccum-pumping equipment, start to vacuumize, start heating when vacuum in stove reaches after below 3Pa, heating-up temperature is 400 DEG C ~ 800 DEG C, temperature retention time 5 ~ 50 hours;
3) block: when pinch off vacuum tube after vacuum to below 0.001Pa, and soldering and sealing is carried out to vacuum tube port;
4) high temperature insostatic pressing (HIP): jacket is put into hot isostatic apparatus and carry out hip treatment, hip temperature 850 ~ 1000 DEG C, pressure 90 ~ 120MPa, 1 ~ 4 hour time, is cooled to less than 300 DEG C and comes out of the stove.
5) jacket is removed: remove jacket by machining process or caustic solution, obtain the titanium alloy member of hip moulding.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105081314A (en) * | 2015-09-25 | 2015-11-25 | 上海交通大学 | Method for preparing titanium product through titanium hydride powder |
| CN105834431A (en) * | 2016-04-11 | 2016-08-10 | 西安欧中材料科技有限公司 | Preparation method of high-uniformity Ti-6Al-4V alloy powder metallurgic block |
| CN106735171A (en) * | 2016-12-27 | 2017-05-31 | 华中科技大学 | A kind of titanium aluminium pre-alloyed powder puts hydrogen and two step dehydrogenation high temperature insostatic pressing (HIP) manufacturing process |
| CN107748094A (en) * | 2017-10-09 | 2018-03-02 | 西北工业大学 | A kind of preparation method of TA15 titanium alloy powders product |
| CN108838404A (en) * | 2018-06-20 | 2018-11-20 | 北京科技大学 | Titanium alloy low cost near-net-shape method |
| CN109353599A (en) * | 2018-10-10 | 2019-02-19 | 中国工程物理研究院材料研究所 | A kind of B4The method of C/Al neutron absorber material green body degasification and long-term preservation |
| WO2019085183A1 (en) * | 2017-10-30 | 2019-05-09 | 东北大学 | Method for fabricating titanium and titanium alloy metallurgical products |
| CN112658456A (en) * | 2020-12-14 | 2021-04-16 | 西安嘉业航空科技有限公司 | Hot isostatic pressing integral forming method for target assembly |
| CN114069360A (en) * | 2021-11-23 | 2022-02-18 | 江苏科技大学 | Light high-conductivity slip ring and preparation method thereof |
| CN114433859A (en) * | 2022-01-25 | 2022-05-06 | 华中科技大学 | High-quality electrode for titanium alloy powder, and preparation and application thereof |
| US20230150052A1 (en) * | 2021-11-17 | 2023-05-18 | Goodrich Corporation | Systems and methods for high strength titanium rod additive manufacturing |
| CN118360511A (en) * | 2024-06-19 | 2024-07-19 | 西安欧中材料科技股份有限公司 | Powder metallurgy method for preparing multi-state mixed tissue part and application thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081314B (en) * | 2015-09-25 | 2017-05-24 | 上海交通大学 | Method for preparing titanium product through titanium hydride powder |
| CN105081314A (en) * | 2015-09-25 | 2015-11-25 | 上海交通大学 | Method for preparing titanium product through titanium hydride powder |
| CN105834431A (en) * | 2016-04-11 | 2016-08-10 | 西安欧中材料科技有限公司 | Preparation method of high-uniformity Ti-6Al-4V alloy powder metallurgic block |
| CN106735171A (en) * | 2016-12-27 | 2017-05-31 | 华中科技大学 | A kind of titanium aluminium pre-alloyed powder puts hydrogen and two step dehydrogenation high temperature insostatic pressing (HIP) manufacturing process |
| CN107748094A (en) * | 2017-10-09 | 2018-03-02 | 西北工业大学 | A kind of preparation method of TA15 titanium alloy powders product |
| WO2019085183A1 (en) * | 2017-10-30 | 2019-05-09 | 东北大学 | Method for fabricating titanium and titanium alloy metallurgical products |
| CN108838404A (en) * | 2018-06-20 | 2018-11-20 | 北京科技大学 | Titanium alloy low cost near-net-shape method |
| CN109353599A (en) * | 2018-10-10 | 2019-02-19 | 中国工程物理研究院材料研究所 | A kind of B4The method of C/Al neutron absorber material green body degasification and long-term preservation |
| CN112658456A (en) * | 2020-12-14 | 2021-04-16 | 西安嘉业航空科技有限公司 | Hot isostatic pressing integral forming method for target assembly |
| US20230150052A1 (en) * | 2021-11-17 | 2023-05-18 | Goodrich Corporation | Systems and methods for high strength titanium rod additive manufacturing |
| CN114069360A (en) * | 2021-11-23 | 2022-02-18 | 江苏科技大学 | Light high-conductivity slip ring and preparation method thereof |
| CN114433859A (en) * | 2022-01-25 | 2022-05-06 | 华中科技大学 | High-quality electrode for titanium alloy powder, and preparation and application thereof |
| CN114433859B (en) * | 2022-01-25 | 2023-02-14 | 华中科技大学 | High-quality electrode for titanium alloy powder, and preparation and application thereof |
| CN118360511A (en) * | 2024-06-19 | 2024-07-19 | 西安欧中材料科技股份有限公司 | Powder metallurgy method for preparing multi-state mixed tissue part and application thereof |
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Application publication date: 20150429 |