CN103667793A - Method for smelting large-sized titanium-nickel-based shape memory alloy ingot - Google Patents
Method for smelting large-sized titanium-nickel-based shape memory alloy ingot Download PDFInfo
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- CN103667793A CN103667793A CN201210323355.5A CN201210323355A CN103667793A CN 103667793 A CN103667793 A CN 103667793A CN 201210323355 A CN201210323355 A CN 201210323355A CN 103667793 A CN103667793 A CN 103667793A
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Abstract
The invention relates to a method for smelting a large-sized titanium-nickel-based shape memory alloy ingot. The method is characterized in that vacuum medium-frequency induction smelting and vacuum consumable electrode electric arc smelting are adopted. According to the method disclosed by the invention, a primary ingot is molded by casting to be square or cylindrical shape via primary smelting through vacuum medium-frequency induction, and the two ends of the ingot are cut, so that the problem of direct welding of a titanium-nickel alloy is solved, and the phenomenon of dropping caused by fall of welding points in a secondary smelting process can be avoided; in secondary smelting distribution, the head and tail of the primary ingot are buckled, secondary smelting is performed by adopting vacuum consumable electrode electric arc smelting after spot welding is performed on joints, and a reasonable feeding process is adopted at the end of smelting, thereby the riser depth of the ingot is reduced. Segregation of nickel element in a solidifying process is reduced via the primary smelting, the phenomenon of off caused by separation of a smelting electrode can be avoided via the secondary smelting, a larger-size ingot can be made, and the components of the final ingot are uniform.
Description
Technical field
The present invention relates to the large size ingot-casting melting method of the Ni-based shape memory alloy of a kind of titanium, particularly a kind ofly by vacuum intermediate-frequency induction melting, add the manufacture method that vacuum self-consumption electrode arc melting obtains the large size ingot-casting of the Ni-based shape memory alloy of the uniform titanium of composition.
Background technology
The Ni-based shape memory alloy of titanium has peculiar shape memory effect and super-elasticity, good wear-resisting, corrosion-resistant and damping capacity and good mechanical property, its range of application is very extensive, relates to the fields such as machinery, electronics, chemical industry, the energy, building, medical treatment and aerospace.The manufacture of the Ni-based shape memory alloy material of titanium, the acquisition of ingot casting is the first step that material is manufactured, the homogeneity of ingot casting composition, size and yield rate are all important research directions.The melting of the Ni-based shape memory alloy of titanium at present has two kinds of methods: a kind of is by vacuum intermediate-frequency melting, and another kind is vacuum self-consumption electrode arc melting.A kind of front method is relatively good aspect the homogeneity of composition, but after alloy cast, the dimensions of ingot casting is less, and yield rate is lower, and production efficiency is lower; Then method can solve a problem for large size ingot-casting, but titanium and nickel element density difference are large, and the homogeneity of ingredients of ingot casting that directly carries out melting institute output is poor.
At present, melting research about the large size ingot-casting of the Ni-based shape memory alloy of titanium is less, the method mostly proposing is to increase the power of medium-frequency induction furnace and the production that capacity is realized the large size ingot-casting of the Ni-based shape memory alloy of titanium, but the casting yield of Medium frequency induction melting or relatively low, and weight is less than vacuum self-consumption electrode arc melting.Therefore, must find a kind of melting method that composition is even, substance is large, yield rate is high that obtains.
Summary of the invention
The object of the invention is to overcome the weak point of the problems referred to above, be intended to propose a kind of melting method of novel Ti-Ni alloy, solved the problem that Ti-Ni alloy welding difficulty, titanium nickel density difference greatly easily occur segregation and have a strong impact on transformation temperature, reach the feature that composition is even, substance is large, yield rate is high, thereby reduce titanium nickel-base alloy in the loss of fusion process and finished product rising head.
The present invention proposes a kind ofly by vacuum intermediate-frequency induction melting, to add the manufacture method that vacuum self-consumption electrode arc melting obtains the large ingot casting of the uniform titanium nickel-base alloy of composition.It is characterized in that:
The starting material that melting is used are: 0 grade of titanium sponge, 1# electrolytic nickel (being cut into strip), other interpolation elements can be one or more in the elements such as chromium, cobalt, copper, vanadium, aluminium, iron, molybdenum, niobium, addition is 0.05～5.0wt.%, addition manner is master alloy or simple substance form, adds transformation temperature and the performance of element adjustable material.
The method is first starting material to be melted under vacuum state, and temperature range is 1300 ℃～1800 ℃, and refining time is 15min～60min; Then pour into a mould square or circular moulding (seeing Fig. 1), (seeing as Fig. 2) cut at ingot casting two ends, take the method to avoid the directly problem of welding of Ti-Ni alloy, can prevent from occurring that solder joint comes off in secondary smelting process, cause " falling bullet " phenomenon; In secondary smelting cloth (seeing Fig. 3), an ingot head and tail is fastened, after butt seam place spot weld, adopt vacuum self-consumption electrode arc melting to carry out secondary smelting (secondary smelting crucible can be selected square or circular according to an ingot shape shape), at melting end, adopt rational feeding technology to reduce the ingot casting rising head degree of depth.Above-mentioned melting once has reduced the segregation of nickel element in process of setting, and secondary smelting can avoid the disengagement of smelting electrode to cause " falling bullet " phenomenon, can make the ingot casting of larger specification, and final ingot casting composition is even;
The present invention adds the manufacture method production Ti-Ni alloy ingot of vacuum self-consumption electrode arc melting by vacuum intermediate-frequency induction melting, the general melting equipment using, industrial production practicality is very strong, and the ingot casting homogeneity of ingredients of institute's output is good, cost is low, efficiency is high, yield rate is high.Solve second electrode Welding Problems simultaneously, avoided occurring " falling bullet " phenomenon; Also have square ingot casting to facilitate the processing of plate product, can save operation, improve sheet material processed finished products rate and reduce total cost.
Accompanying drawing explanation
Fig. 1 is an ingot casting mold shape;
Fig. 2 is shape behind an ingot casting casting cutting two;
Fig. 3 is second electrode cloth schematic diagram;
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
The present invention a kind ofly adds by vacuum intermediate-frequency induction melting the manufacture method that vacuum self-consumption electrode arc melting obtains the large ingot casting of the uniform titanium nickel-base alloy of composition.The production method of ingot casting includes following steps:
The first step: according to a certain alloying constituent proportioning, accurately weigh the starting material (comprising titanium sponge, electrolytic nickel and other alloying elements) through being up to the standards;
Second step: pack in vacuum intermediate-frequency induction melting furnace crucible weighing starting material accurately, be heated between 1300 ℃-1800 ℃, melted rear maintenance 15min-60min refining, be poured into subsequently square or circular mold (seeing Fig. 1), from mold, taken off and be ingot casting one time;
The 3rd step: once (seeing Fig. 2) cut at square or circular ingot casting two, then is welded to form second electrode according to Fig. 3 distributing mode;
The 4th step: adopt vacuum self-consumption electrode arc melting furnace to carry out secondary smelting second electrode, finally adopt conventional titanium alloy melting feeding technology in melting.After taking-up, be the large size ingot-casting of the Ni-based shape memory alloy of the uniform titanium of composition.
Embodiment 1:
Be selected to and be divided into Ni:56wt.%, the binary Ultimum Ti of Ti:44wt.%, starting material are 0 grade of titanium sponge and 1# electrolytic nickel, weigh 56kg electrolytic nickel and 44kg titanium sponge (three groups), and each group is all packed in vacuum intermediate-frequency induction melting furnace crucible.Through finding time after (pressure is less than 0.1pa), energising heating, all melts it by between heating raw materials to 1300 ℃～1800 ℃, and keeps 15～60min refining.Be poured into subsequently in circular mold, ingot of cooling rear taking-up, presses circular ingot casting size cutting in Fig. 2 by three ingot castings, then is welded to form second electrode by Fig. 3 distributing mode.Then, use vacuum self-consumption electrode arc melting furnace that second electrode is melted, finally emit notch portion to adopt the feeding technology of conventional titanium alloy melting.
In the upper bottom of ingot casting composition sampling inspection results as table 1:
Embodiment 2:
Be selected to and be divided into Ni:55wt.%, the binary Ultimum Ti of Ti:46wt.%, starting material are 0 grade of titanium sponge and 1# electrolytic nickel, weigh 55kg electrolytic nickel and 46kg titanium sponge (three groups), and each group is all packed in vacuum intermediate-frequency induction melting furnace crucible.Through finding time after (pressure is less than 0.1pa), energising heating, all melts it by between heating raw materials to 1300 ℃～1800 ℃, and keeps 15～60min refining.Be poured into subsequently in square shape mold, ingot of cooling rear taking-up, presses square shape ingot casting size cutting in Fig. 2 by three ingot castings, then is welded to form second electrode by Fig. 3 distributing mode.Then, use vacuum self-consumption electrode arc melting furnace that second electrode is melted, finally emit notch portion to adopt the feeding technology of conventional titanium alloy melting.
At ingot casting upper, middle and lower Subsampling, detect composition result as table 2:
Embodiment 3:
Be selected to and be divided into Ni:55.5wt.%, Ti:44.2wt.%, the ternary Ultimum Ti of Cr:0.3wt.%, starting material are 0 grade of titanium sponge, 1# electrolytic nickel and electrolysis chromium, weigh 55.5kg electrolytic nickel, 44.2kg titanium sponge and 0.3kg electrolysis chromium (three groups), each group is all packed in vacuum intermediate-frequency induction melting furnace crucible.Through finding time after (pressure is less than 0.1pa), energising heating, all melts it by between heating raw materials to 1300 ℃～1800 ℃, and keeps 15～60min refining.Be poured into subsequently in circular mold, ingot of cooling rear taking-up, presses circular ingot casting size cutting in Fig. 2 by three ingot castings, then is welded to form second electrode by Fig. 3 mode cloth.Then, use vacuum self-consumption electrode arc melting furnace that second electrode is melted, finally emit notch portion to adopt the feeding technology of conventional titanium alloy melting.
At ingot casting upper, middle and lower Subsampling, detect composition result as table 3:
Claims (2)
1. the large size ingot-casting melting method of the Ni-based shape memory alloy of titanium, is characterized in that: the method institute scope of application is Ni-Ti-based shape memory alloy, and the final acquisition of ingot casting is to realize by vacuum intermediate-frequency induction melting and vacuum self-consumption electrode arc melting.
2. the large size ingot-casting melting method of a kind of Ni-Ti-based shape memory alloy according to claim 1, is characterized in that: by a square or circular moulding of ingot cast of vacuum intermediate-frequency induction melting, cut at ingot casting two ends; In secondary smelting cloth, an ingot head and tail is fastened, after butt seam place spot weld, adopt vacuum self-consumption electrode arc melting to carry out secondary smelting, at melting end, adopt rational feeding technology to reduce the ingot casting rising head degree of depth.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087983A (en) * | 2015-09-10 | 2015-11-25 | 西北有色金属研究院 | Preparation method for nickel-based alloy ingot |
| CN106594048A (en) * | 2016-11-08 | 2017-04-26 | 国家电网公司 | Bolt assembly of shape memory alloy cable clamp |
| CN107245606A (en) * | 2017-05-26 | 2017-10-13 | 西安赛特思迈钛业有限公司 | A kind of preparation method of Ti-Ni alloy large-sized casting ingot |
| CN109355517A (en) * | 2018-11-29 | 2019-02-19 | 西安华创新材料有限公司 | A kind of big size ingot-casting method of smelting in the ultralow gap of niti-shaped memorial alloy |
| CN113234945A (en) * | 2021-05-07 | 2021-08-10 | 先导薄膜材料（广东）有限公司 | Titanium-nickel shape memory alloy target material and preparation method thereof |
| CN114032419A (en) * | 2021-11-09 | 2022-02-11 | 重庆三耐科技有限责任公司 | Aluminum-nickel-tungsten intermediate alloy and preparation method thereof |
| CN114574718A (en) * | 2022-03-29 | 2022-06-03 | 西北有色金属研究院 | Preparation method of 60NiTi alloy bearing |
| CN114875294A (en) * | 2022-06-07 | 2022-08-09 | 上海工程技术大学 | Titanium-nickel-based alloy material and preparation method and application thereof |
| CN114918570A (en) * | 2022-05-06 | 2022-08-19 | 燕山大学 | Method for quickly fusion welding metal cast ingot |
| CN115369286A (en) * | 2022-08-29 | 2022-11-22 | 沈阳中核舰航特材科技有限公司 | Alpha + beta type titanium alloy for fastener, preparation method and preparation method of bar thereof |
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2012
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087983B (en) * | 2015-09-10 | 2017-03-01 | 西北有色金属研究院 | A kind of preparation method of nickel-base alloy ingot |
| CN105087983A (en) * | 2015-09-10 | 2015-11-25 | 西北有色金属研究院 | Preparation method for nickel-based alloy ingot |
| CN106594048A (en) * | 2016-11-08 | 2017-04-26 | 国家电网公司 | Bolt assembly of shape memory alloy cable clamp |
| CN107245606A (en) * | 2017-05-26 | 2017-10-13 | 西安赛特思迈钛业有限公司 | A kind of preparation method of Ti-Ni alloy large-sized casting ingot |
| CN109355517A (en) * | 2018-11-29 | 2019-02-19 | 西安华创新材料有限公司 | A kind of big size ingot-casting method of smelting in the ultralow gap of niti-shaped memorial alloy |
| CN113234945B (en) * | 2021-05-07 | 2022-07-12 | 先导薄膜材料（广东）有限公司 | Titanium-nickel shape memory alloy target material and preparation method thereof |
| CN113234945A (en) * | 2021-05-07 | 2021-08-10 | 先导薄膜材料（广东）有限公司 | Titanium-nickel shape memory alloy target material and preparation method thereof |
| CN114032419A (en) * | 2021-11-09 | 2022-02-11 | 重庆三耐科技有限责任公司 | Aluminum-nickel-tungsten intermediate alloy and preparation method thereof |
| CN114574718A (en) * | 2022-03-29 | 2022-06-03 | 西北有色金属研究院 | Preparation method of 60NiTi alloy bearing |
| CN114574718B (en) * | 2022-03-29 | 2022-08-16 | 西北有色金属研究院 | Preparation method of 60NiTi alloy bearing |
| CN114918570A (en) * | 2022-05-06 | 2022-08-19 | 燕山大学 | Method for quickly fusion welding metal cast ingot |
| CN114875294A (en) * | 2022-06-07 | 2022-08-09 | 上海工程技术大学 | Titanium-nickel-based alloy material and preparation method and application thereof |
| CN114875294B (en) * | 2022-06-07 | 2023-05-12 | 上海工程技术大学 | Titanium nickel base alloy material and preparation method and application thereof |
| CN115369286A (en) * | 2022-08-29 | 2022-11-22 | 沈阳中核舰航特材科技有限公司 | Alpha + beta type titanium alloy for fastener, preparation method and preparation method of bar thereof |
| CN115369286B (en) * | 2022-08-29 | 2023-04-18 | 沈阳中核舰航特材科技有限公司 | Alpha + beta type titanium alloy for fastener, preparation method and preparation method of bar thereof |
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Application publication date: 20140326 |