CN103602937B - A kind of method prepared by high performance high-density tungsten alloy material - Google Patents
A kind of method prepared by high performance high-density tungsten alloy material Download PDFInfo
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- CN103602937B CN103602937B CN201310607307.3A CN201310607307A CN103602937B CN 103602937 B CN103602937 B CN 103602937B CN 201310607307 A CN201310607307 A CN 201310607307A CN 103602937 B CN103602937 B CN 103602937B
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Abstract
The invention discloses novel method prepared by a kind of high performance high-density tungsten alloy material, the concave die cavity passage of its mould is design with the corner of continuous 90 ° by the pipeline with same cross-sectional area, namely mold cavity passage connects by equal channel angular pressing path Ba and forms, one time extrusion process realizes 3 inferior passage bent angle extrusion shearing distortion, feature of the present invention is the performance by the disposable high density tungsten alloy that is improved of method waiting passage bent angle continuously extruded, not only can obtain the high performance high density tungsten alloy with fibrous tissue, its mechanical property can also be improved, improve intensity and hardness, improve material use efficiency, save the time.Continuous equal channel angular pressing improves the working efficiency of extruding, alleviates the labour intensity handling workman, has widened equal channel angular pressing distortion, improved the over-all properties of high density tungsten alloy.
Description
Technical field
The present invention relates to a kind of preparation method of high density tungsten alloy, especially relate to novel method prepared by a kind of high performance high-density tungsten alloy material
Background technology
High density tungsten alloy is for matrix with tungsten (massfraction of tungsten is generally 80%-97%), add a small amount of alloying element powder metallurgy liquid phase method such as nickel, iron, copper sintering to form, high density tungsten alloy not only density is large, and intensity is high, hardness is high, ductility is good, weldability is good.These performances make it be widely used, as armour piercing shot, inertance element and balance weight element etc. in military and industrial aspect.Along with the strengthening day by day of military industry, higher requirement be it is also proposed to the performance of high density tungsten alloy.Severe plastic deformation and forging processing are carried out to high density tungsten alloy, and matches with thermal treatment process, the high performance high density tungsten alloy with fibrous tissue can be obtained.
Severe plastic deformation is the effective ways preparing super fine crystal material, and the method can prepare block fine and close material, changes the size of crystal grain and the direction of arrangement, and technique is simple, and with low cost, material use efficiency is high.Traditional waits passage bent angle technique to be crystal grain thinning more efficiently severe plastic deformation method, the refinement of material grains can be realized by the extruding of multi-pass, but need manual operation between different passage, waste the time, reduce working efficiency, if be designed to continuous passage, once extrude the effect that just can realize traditional technology many times, this not only increases working efficiency, improve material property, also reduce material produce cost.
Summary of the invention
The object of the invention is: for the technical problem of above-mentioned existence, a kind of novel method that can obtain high performance high density tungsten alloy is provided, this method just can realize the effect of traditional technology 3 times by one-time process process, the method not only can obtain the high performance high density tungsten alloy with fibrous tissue, improve its mechanical property, improve intensity and hardness, the working efficiency of extruding can be improve again, save material and time.
For solving above-mentioned technical matters, technical scheme of the present invention is: die die cavity to be connected by equal channel angular pressing path Ba with 90 ° by the pipeline with same cross-sectional area and forms, and one-time process realizes 3 shearing strain, and concrete implementation step is
1. utilize line cutting technology material to be cut into diameter for 10mm, length is the sample of 40mm, and carries out Full Annealing to sample;
2. before extrusion being put into die cavity, first mould is lubricated fully, after putting into extrusion, mould and extrusion are preheating to certain temperature simultaneously, after having extruded, stress relief annealing is carried out to extrusion;
3., due to punch limited length, when after the complete admission passage of extrusion, at this moment advance the motion of a front extrusion by putting into another extrusion, until extrusion has extruded;
4. after having extruded, stress relief annealing is carried out to extrusion.
The invention has the beneficial effects as follows: continuously extruded by high density tungsten alloy, by coarse grain refinement, the high performance material with fibrous tissue can be obtained, improve the intensity of high density tungsten alloy, hardness and ductility.The continuous working efficiency waiting channel pressings distortion can improve extruding, alleviates the labour intensity handling workman, has widened equal channel angular pressing distortion, improve material use efficiency, improved the over-all properties of high density tungsten alloy.
Accompanying drawing explanation
Fig. 1 is the assembly drawing of die of novel method prepared by a kind of high performance high-density tungsten alloy material;
Fig. 2 is die sectional view;
Fig. 3 is two_layer pre_stress combined matrix structure.
Being labeled as in above-mentioned figure:
1. lower bolster 2. guide pillar 3. socket head cap screw 4. guide pin bushing 5. top plate 6. punch retainer 7. setting circle pin 8. punch 9. convex mould pad 10. socket head cap screw 11. die pressing plate 12. second layer die gland 13. the first layer die gland 14. die 15. die cushion blocks of the assembly drawing of die of novel method prepared by a kind of high performance high-density tungsten alloy material of Fig. 1.
Embodiment
Squeezing passage design details skill as can be seen from the pre-stress combination matrix structure of the die sectional view of assembly drawing of die of the present invention shown in Fig. 1, Fig. 2, Fig. 3, the present invention mainly contains the compositions such as 1. lower bolster 2. guide pillar 3. socket head cap screw 4. guide pin bushing 5. top plate 6. punch retainer 7. setting circle pin 8. punch 9. convex mould pad 10. socket head cap screw 11. die pressing plate 12. second layer die gland 13. the first layer die gland 14. die 15. die cushion blocks.In extrusion process, first extrusion experiment material therefor is passed through Linear cut blanking, then diameter 10mm is processed into by cutting process, length is the sample of 40mm, first anneal is carried out before extruding, then continuous equal channel angular pressing mould is put into, due to punch limited length, when after the complete admission passage of extrusion, at this moment the motion of a front extrusion is advanced by putting into another extrusion, until extrusion has extruded.Die design of the present invention is different from the mould of conventional equal channel angular pressing, after extrusion completes a crush stroke, be equivalent to extrusion and carried out 3 shearing strain, after a time has extruded, extruding can be repeated, until sample performance reaches test requirements document to sample.Owing to adopting pre-stress combination matrix structure, die life is improved, and improves success ratio and the extruding efficiency of experiment.After having extruded, stress relief annealing to be carried out to extrusion.
Die continuous passage structure of the present invention; all prior art can be adopted; the present invention is not limited to above-mentioned cited concrete form of implementation, and all those skilled in the art, without the getable improvement of creative work, all belong in protection scope of the present invention.
Equipment required for the present invention is mechanical press or hydropress.
Claims (3)
1. the method prepared of high performance high-density tungsten alloy material, implementation step is as follows:
A () utilizes line cutting technology material to be cut into diameter for 10mm, length is the sample of 40mm, and carries out Full Annealing to sample;
B () first lubricates mould before extrusion is put into die cavity fully, after putting into extrusion, mould and extrusion are preheating to certain temperature simultaneously, after having extruded, carries out stress relief annealing to extrusion;
C (), due to punch limited length, when after the complete admission passage of extrusion, at this moment advances the motion of a front extrusion, until extrusion has extruded by putting into another extrusion;
D () carries out stress relief annealing to extrusion after having extruded.
2. the mould that a kind of method prepared of high performance high-density tungsten alloy material is used according to claim 1, mould structure comprises as lower component: lower bolster, guide pillar, socket head cap screw, guide pin bushing, top plate, punch retainer, setting circle pin, convex mould pad, socket head cap screw, punch, die pressing plate, second layer die gland, the first layer die gland, die, cushion block and die backing plate, is characterized in that:
A () this mould adopts two_layer pre_stress combined matrix structure, adopt the prestressed structure of shrink-fit to increase substantially mould strength;
B () arranges heating unit in the outside of die, to carry out preheating to mould and extrusion;
C () completes a crush stroke after, extrusion experienced by 3 shearing strain.
3. the mould that a kind of method prepared of high performance high-density tungsten alloy material is used according to claim 2, is characterized in that: the cavity structure of female die of die by the identical pipeline of cross-sectional area with 90 °, to connect by equal channel angular pressing path Ba and form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607307.3A CN103602937B (en) | 2013-11-27 | 2013-11-27 | A kind of method prepared by high performance high-density tungsten alloy material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310607307.3A CN103602937B (en) | 2013-11-27 | 2013-11-27 | A kind of method prepared by high performance high-density tungsten alloy material |
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| CN103602937A CN103602937A (en) | 2014-02-26 |
| CN103602937B true CN103602937B (en) | 2015-12-02 |
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| CN201310607307.3A Active CN103602937B (en) | 2013-11-27 | 2013-11-27 | A kind of method prepared by high performance high-density tungsten alloy material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106011514B (en) * | 2016-06-21 | 2017-12-12 | 山东建筑大学 | The method that the isochannel repeated extruding in 45 ° of turnings prepares superhigh intensity titanium matrix composite |
| CN110586681B (en) | 2019-10-25 | 2021-04-02 | 中北大学 | Extrusion forming die for cabin component |
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- 2013-11-27 CN CN201310607307.3A patent/CN103602937B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| AZ31镁合金等通道转角挤压工艺优化与实验研究;刘婷等;《燕山大学学报》;20130331;第37卷(第2期);第111-116页 * |
| 等通道弯角挤压（ECAP）变形机理数值模拟与实验研究;徐淑波;《中国优秀博硕士论文全文数据库（博士） 工程科技I辑》;20070515(第5期);第67、115、117-118、132页 * |
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Inventor after: Xu Shubo Inventor after: Zheng Zuhui Inventor after: Zheng Lingfang Inventor before: Xu Shubo Inventor before: Liu Ting Inventor before: Jing Cainian Inventor before: Lin Xiaojuan Inventor before: Ren Guocheng |
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Effective date of registration: 20170609 Address after: 350300 Fujian city of Fuzhou province Fuqing Rong Photoelectric Technology Park Economic Development Zone (Fujian province nohon new Mstar Technology Ltd R & D center building three floor) Patentee after: Nuo Xi Technology Park, Fujian Province Development Co., Ltd Address before: School of materials Shandong Jianzhu University No. 1000, Licheng District Lingang Development Zone, 250101 Ji'nan Road, Shandong Province Patentee before: Shandong Construction University |
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