CN101397619B - Novel casting titanium alloy ZTi-6Al-4V-0.01Y - Google Patents
Novel casting titanium alloy ZTi-6Al-4V-0.01Y Download PDFInfo
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- CN101397619B CN101397619B CN2007101896350A CN200710189635A CN101397619B CN 101397619 B CN101397619 B CN 101397619B CN 2007101896350 A CN2007101896350 A CN 2007101896350A CN 200710189635 A CN200710189635 A CN 200710189635A CN 101397619 B CN101397619 B CN 101397619B
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Abstract
The invention relates to a novel casting titanium alloy ZTi-6Al-4V-0.01 Y which consists of sponge Ti, Al, Y, Al-V intermediate alloys, a sponge Ti electrode is prepared and pressed by evenly mixing 88.60 to 90.90 percent of Ti, 5.5 to 6.8 percent of Al, 0.005 to 0.03 percent of Y and 3.5 to 4.5 percent of V according to weight percentage, then vacuum melting is carried out in a vacuum consumableelectrode arc furnace with melting vacuum degree of 0 to 10Pa, arc voltage of 32-36V and arc current of 5000-6000A, and then the ZTi-6Al-4V-0.01 Y product casting is carried out in a vacuum consumableelectrode skull furnace with melting vacuum degree of 0 to 5Pa, arc voltage of 30 to 40V and arc current of 20000 to 30000A. Comparing with ZTC4 materials, the ZTi-6Al-4V-0.01 Y has higher strength and elongation and great application prospect.
Description
Technical field
The invention belongs to the casting titanium alloy material technical field, specially refer to a kind of novel casting titanium alloy ZTi-6Al-4V-0.01Y.
Background technology
The ZTC4 titanium alloy has better comprehensive mechanical property, and intensity is higher, and is heat-treatable strengthened, and the thermal pressure processibility is good, and thermotolerance is also relatively good under moderate temperature, is present most widely used commercial titanium alloy material.90% is this alloy in the titanium alloy casting of China's development at present and production.The performance requriements of ZTC4 alloy is among the GB6614-1994 " the casting titanium or titanium alloy trade mark and room-temperature mechanical property ": R
P0.2〉=825MPa, R
m〉=895MPa, A 〉=6%.
The ZTC4 alloy belongs to a+ β diphasic titanium alloy, have better comprehensive mechanical property, but intensity is low than beta-titanium alloy, and the purer titanium of plasticity is poor.In order to enlarge the Application Areas of titanium alloy, both at home and abroad the intensity and the plasticity of titanium alloy material are had higher requirement, particularly a kind of titanium alloy material of active demand has a high-intensity while and can have high-ductility.Yet the titanium alloy material normal conditions are to add when alloying element improves intensity to tend to cause plasticity to reduce, and are difficult to reach both and improve simultaneously.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of novel casting titanium alloy ZTi-6Al-4V-0.01Y, and this ZTi-6Al-4V-0.01Y more now has higher intensity, higher unit elongation with the ZTC4 material, has great application prospect.
In order to realize the foregoing invention purpose, the present invention has adopted following technical scheme:
Described novel casting titanium alloy ZTi-6Al-4V-0.01Y is with sponge Ti, pure Al, pure Y, the Al-V master alloy is Ti88.60～90.90% by weight percentage, Al5.5～6.8%, Y0.005～0.03%, V3.5～4.5% and inevitable impurity are prepared and be pressed into the sponge Ti electrode behind uniform mixing, then the sponge Ti electrode is carried out vacuum melting in vaccum consumable electrode electric arc furnace, melting this moment vacuum tightness 0-10Pa, arc voltage 32-36V, arc current 5000-6000A, then at vacuum consumable electrode skull crucible vacuum tightness 0-5Pa, arc voltage 30-40V carries out the cast of ZTi-6Al-4V-0.01Y product under the arc current 20000-30000A.
Owing to adopted technical scheme as mentioned above, the present invention has following superiority:
1, the ZTi-6Al-4V-0.01Y alloy of the present invention improvement material that is ZTC4, more now have higher intensity, higher unit elongation, the performance requriements of ZTC4 alloy: R among the GB6614-1994 " the casting titanium or titanium alloy trade mark and room-temperature mechanical property " with the ZTC4 material
P0.2〉=825MPa, Rm 〉=895MPa, A 〉=6%.
2, ZTi-6Al-4V-0.01Y titanium alloy as cast condition mechanical property of the present invention satisfies: Rm 〉=925MPa, R
P0.2〉=845MPa, A 〉=7.0%, hardness HRC≤35.
Embodiment
Embodiment 1:
Ti89.35%, Al6.57%, Y0.005%, V3.78% prepare be pressed into the titanium sponge electrode behind uniform mixing by weight percentage with sponge Ti, pure Al, pure Y and Al-V master alloy, the titanium sponge electrode is carried out vacuum melting in vaccum consumable electrode electric arc furnace, the titan alloy casting ingot that is smelted into melts back cast golf club formwork in the vacuum consumable electrode skull crucible, the mechanical property under its as-cast condition is as follows:
Room temperature yield strength 850MPa, tensile strength 930MPa, unit elongation 8.5%, hardness HRC=32.0.
Embodiment 2:
Ti90.18%, Al5.92%, Y0.013%, V3.67% prepare be pressed into the titanium sponge electrode behind uniform mixing by weight percentage with sponge Ti, pure Al, pure Y and Al-V master alloy, the titanium sponge electrode is carried out vacuum melting in vaccum consumable electrode electric arc furnace, the titan alloy casting ingot that is smelted into melts back cast golf club formwork in the vacuum consumable electrode skull crucible, the mechanical property under its as-cast condition is as follows:
Room temperature yield strength 883MPa, tensile strength 976MPa, unit elongation 7.8%, hardness HRC=30.0.
Embodiment 3:
Ti89.36%, Al6.53%, Y0.032%, V3.82% prepare be pressed into the titanium sponge electrode behind uniform mixing by weight percentage with sponge Ti, pure Al, pure Y and Al-V master alloy, the titanium sponge electrode is carried out vacuum melting in vaccum consumable electrode electric arc furnace, the titan alloy casting ingot that is smelted into melts back cast golf club formwork in the vacuum consumable electrode skull crucible, the mechanical property under its as-cast condition is as follows:
Room temperature yield strength 885MPa, tensile strength 960MPa, unit elongation 7.5%, hardness HRC=31.5.
Above-mentioned 3 its surpluses of routine material content are inevitable impurity, vacuum tightness 0-10Pa during vacuum melting, arc voltage 32-36V, arc current 5000-6000A, at vacuum consumable electrode skull crucible vacuum tightness 0-5Pa, arc voltage 30-40V carries out the cast of ZTi-6Al-4V-0.01Y product under the arc current 20000-30000A.
Because very high, the difficult dissolving of the fusing point of V in order to add alloying element V in the titanium matrix, is adopted the form adding of Al-V master alloy when material is made.
It is close with ZTC4 with unit elongation that pure Y content is lower than the intensity of prescribing a time limit down, do not have the effect of strengthening and improving plasticity; Though the intensity that is higher than material in limited time has by a relatively large margin raising than ZTC4, plasticity has by a relatively large margin decline than ZTC4, particularly brittle failure occurs when pure Y content material above 0.4% time.
Adding rare earth element yttrium Y in the ZTC4 alloy can crystal grain thinning, and seizing a part has dysgenic gaseous impurities to plasticity, as O, N, has reduced Al equivalent concentration, thereby improves plasticity; In addition, in the time of the adding crystal grain thinning of Y, form Y
2O
3Alloy is played strengthening effect, improved the intensity of material.
In sum, ZTi-6Al-4V-0.01Y more now has higher intensity, higher unit elongation with the ZTC4 material, the room temperature yield strength 〉=845MPa of this titanium alloy, tensile strength 〉=925MPa, unit elongation 〉=7%, hardness HRC≤35.
Claims (1)
1. novel casting titanium alloy ZTi-6Al-4V-0.01Y, it is characterized in that: with sponge Ti, pure Al, pure Y, the Al-V master alloy is Ti88.60～90.90% by weight percentage, Al5.5～6.8%, Y0.005～0.03%, V3.5～4.5% and inevitable impurity are prepared and be pressed into the sponge Ti electrode behind uniform mixing, then the sponge Ti electrode is carried out vacuum melting in vaccum consumable electrode electric arc furnace, melting this moment vacuum tightness 0-10Pa, arc voltage 32-36V, arc current 5000-6000A, then at vacuum consumable electrode skull crucible vacuum tightness 0-5Pa, arc voltage 30-40V carries out the cast of ZTi-6Al-4V-0.01Y product under the arc current 20000-30000A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101896350A CN101397619B (en) | 2007-09-26 | 2007-09-26 | Novel casting titanium alloy ZTi-6Al-4V-0.01Y |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101896350A CN101397619B (en) | 2007-09-26 | 2007-09-26 | Novel casting titanium alloy ZTi-6Al-4V-0.01Y |
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| Publication Number | Publication Date |
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| CN101397619A CN101397619A (en) | 2009-04-01 |
| CN101397619B true CN101397619B (en) | 2010-06-02 |
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| CN2007101896350A Expired - Fee Related CN101397619B (en) | 2007-09-26 | 2007-09-26 | Novel casting titanium alloy ZTi-6Al-4V-0.01Y |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665882B (en) * | 2009-09-30 | 2013-06-19 | 四川大学 | Aluminum preliminary alloy refiner containing titanium and vanadium, aluminum alloy containing titanium and vanadium and preparation method |
| CN102181746A (en) * | 2011-04-21 | 2011-09-14 | 辽宁峰阁钛业集团有限公司 | High-temperature-resistant titanium alloy |
| CN104278167B (en) * | 2014-09-15 | 2017-02-08 | 安泰科技股份有限公司 | Manufacturing method of high-quality titanium-aluminum alloy target |
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| CN1099807A (en) * | 1993-09-02 | 1995-03-08 | 航空航天工业部第六二一研究所 | Uniformized smelt casting tech. for titanium-aluminium compound base alloy |
| CN1123844A (en) * | 1994-11-21 | 1996-06-05 | 中国科学院金属研究所 | Intermediate alloy Al-Ti-RE compound used for melting Ti alloy |
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| CN101023192A (en) * | 2004-07-13 | 2007-08-22 | 埃尔凯姆有限公司 | High strength, oxidation and wear resistant titanium-silicon base alloys |
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| CN1099807A (en) * | 1993-09-02 | 1995-03-08 | 航空航天工业部第六二一研究所 | Uniformized smelt casting tech. for titanium-aluminium compound base alloy |
| CN1123844A (en) * | 1994-11-21 | 1996-06-05 | 中国科学院金属研究所 | Intermediate alloy Al-Ti-RE compound used for melting Ti alloy |
| CN1584080A (en) * | 2004-06-16 | 2005-02-23 | 哈尔滨工业大学 | TiAl intermetallic compound materials containing yttebium and preparing method thereof |
| CN101023192A (en) * | 2004-07-13 | 2007-08-22 | 埃尔凯姆有限公司 | High strength, oxidation and wear resistant titanium-silicon base alloys |
| CN1718323A (en) * | 2005-08-05 | 2006-01-11 | 哈尔滨工业大学 | Casting method of large size hole defect less TiA1 base alloy ingot |
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| JP特开平7-242966A 1995.09.19 |
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| 王浪平等.钇的预注入对Ti-6Al-4V合金氮等离子体浸没离子注入行为的影响.中国稀土学报第18卷 第4期.2000,第18卷(第4期),337-340. * |
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