CN103215459A - Preparation method of low-carbon and low-oxygen titanium-nickel alloy large ingot - Google Patents
Preparation method of low-carbon and low-oxygen titanium-nickel alloy large ingot Download PDFInfo
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- CN103215459A CN103215459A CN2013101526325A CN201310152632A CN103215459A CN 103215459 A CN103215459 A CN 103215459A CN 2013101526325 A CN2013101526325 A CN 2013101526325A CN 201310152632 A CN201310152632 A CN 201310152632A CN 103215459 A CN103215459 A CN 103215459A
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Abstract
The invention discloses a preparation method of a low-carbon and low-oxygen titanium-nickel alloy large ingot. The preparation method comprises the steps of: preparing a titanium-nickel alloy primary ingot through smelting in a vacuum induction furnace, installing and welding the titanium-nickel alloy primary ingot to obtain a consumable electrode, and implementing consumable melting in vacuum to obtain a titanium-nickel alloy secondary ingot. The method is suitable for casting a titanium-nickel binary alloy in which the nickel content accounts for 49-52at%, and is capable of effectively controlling the contents of impurities, wherein C% is not greater than 0.05%, O+N% is not greater than 0.05%, H% is not greater than 0.005%, and the like. The preparation method can meet demands of medical health and other fields on the titanium-nickel alloy.
Description
Technical field:
The present invention relates to a kind of Ti-Ni alloy melting method, particularly a kind of melting method of low-carbon (LC) hypoxemia Ti-Ni marmem large-sized casting ingot.
Background technology:
The Ni-based shape memory alloy of titanium is a kind of novel metal functional materials with shape memory, super-elasticity and high damping three big characteristics that rises in the sixties in 20th century, also has good biocompatibility simultaneously, has obtained using widely at medicine and hygiene fields.Titanium nickel medical material mainly refers to atomic ratio alloys such as two component system TiNi, comprise medical Steel Plate For Fixation Of Fracture, stent, medical catheter, medical filament and extension product thereof (as wire for correcting shape of tooth, inner support, operating sutures etc.), make full use of its good shape memory, super-elasticity and biocompatibility.
The medical titanium nickel material has strict requirement to the impurity element of alloy, and U.S. mark ASTM F2063, GB GB24627 clearly represent: C%≤0.05%, (O+N) %≤0.05%, H%≤0.005% etc.Present domestic Ti-Ni alloy ingot generally all adopts the mode of Medium frequency induction melting to obtain, though this method can access homogeneous microstructure, the ingot casting that composition proportion is suitable, but because plumbago crucible is selected in melting for use, the content of C, O element can not effectively be controlled, foreign matter content is higher relatively, can not satisfy the requirement of the product of high technology contents such as medical titanium nickel shape memory alloy kapillary, ultrafine wire to ingot quality.
Along with the continuous expansion of Ti-Ni alloy range of application and demand, the uniform and stable property of material property has also had higher requirement.The small-sized ingot casting of the general preparation of the 25Kg Medium frequency induction melting of Cai Yonging now 10～15Kg, and alloy is mobile relatively poor, and the restriction of pouring condition, produce defectives such as pore, cold shut inevitably.Be the lumber recovery and batch stability that improve material, the development of large-sized casting ingot becomes inevitable trend.
The method that the present invention adopts the Medium frequency induction melting to combine with consumable electrode vacuum furnace melting secondary smelting, the foreign matter content of an ingot of strict control induction melting utilizes the self-consuming furnace melting to increase ingot shape, obtains even, the clean Large Titanium nickel ingot casting of composition.
Summary of the invention:
Design of the present invention is, adopts the Medium frequency induction melting to obtain ingot casting of Ti-Ni alloy of homogeneous microstructure earlier, and key is to adopt the CaO crucible effectively to reduce alloy impurity content.Be consumable electrode with its assembly welding again, by the ingot casting of consumable electrode vacuum furnace melting preparation 70～130Kg.
For achieving the above object, technical scheme of the present invention is:
A kind of preparation method of low-carbon (LC) hypoxemia Ti-Ni alloy large-sized casting ingot adopts earlier vacuum induction melting to prepare ingot casting of Ti-Ni alloy, ingot casting assembly welding of Ti-Ni alloy is become consumable electrode again and carries out the consumable electrode vacuum furnace melting and become Ti-Ni alloy secondary ingot casting.The foreign matter content control of an ingot casting of Ti-Ni alloy and the processing before the assembly welding, it is key of the present invention that the vacuum tightness of consumable smelting requires.
Starting material must be selected 0 grade of titanium sponge, Ni9999 electrolytic nickel for use, adopt the Ti-Ni alloy ingot of 25Kg intermediate frequency vacuum induction melting 15Kg.Induction melting adopts the CaO crucible effectively to reduce alloy impurity content: C%≤0.04%, (O+N) %≤0.04%, H%≤0.005% etc.To an ingot excision rising head, strip off the skin after the processing, carry out assembly welding as consumable electrode, because the restriction of electrode length, an ingot number of assembly welding can be selected between 6～12.The consumable electrode vacuum furnace melting just can obtain, the secondary ingot casting of 70～130Kg.
The 0 grade of titanium sponge of ingot casting raw material selection of described Ti-Ni alloy and the trade mark are the electrolytic nickel of Ni9999.
The crucible of described vacuum induction furnace is the CaO crucible.
The foreign matter content of an ingot casting of described Ti-Ni alloy is C%≤0.04%, (O+N) %≤0.04%, H%≤0.005%.
Described vacuum induction furnace is the 25Kg vacuum induction furnace.
Ingot casting of described Ti-Ni alloy must excise rising head, strips off the skin after the processing, carries out the assembly welding consumable electrode again.
Φ 160～Φ 220mm copper crucible is selected in the melting of described Ti-Ni alloy consumable electrode vacuum furnace for use, and vacuum tightness is lower than 10
-1Pa.
Described Ti-Ni alloy secondary ingot casting is 70～130Kg.
Nickel content is 49～52at% in the described Ti-Ni alloy secondary ingot casting.
Impurity content is C%≤0.05%, O+N%≤0.05%, H%≤0.005% in the described Ti-Ni alloy secondary ingot casting.
The present invention compared with prior art has the following advantages: the present invention obtains on the basis of even matter titanium nickel ingot casting at induction melting, adopt the CaO crucible effectively to reduce alloy impurity content, by the melting of secondary self-consuming furnace, realized meeting the above Large Titanium nickel ingot casting of 100Kg of medical titanium nickelalloy requirement again.
Embodiment:
Below the present invention is done and describes in further detail:
Embodiment 1:
The melting method of TiNi49 (Ti-Ni49at%) alloy Φ 160-70Kg ingot casting: earlier with 0 grade of titanium sponge of starting material, Ni9999 electrolytic nickel according to Ti-Ni49at% (Ti-Ni54.08wt%) proportioning, at the Ti-Ni alloy ingot of the 25Kg intermediate frequency vacuum induction melting Φ 100-15Kg that the CaO crucible is housed.Sampling analysis shows: C%=0.022%, (O+N) %=0.040%, H%=0.002%.With an ingot excision rising head, strip off the skin after the processing, select for use 6 to carry out assembly welding as consumable electrode, weight is 70Kg.Φ 160mm copper crucible is selected in the consumable electrode vacuum furnace melting for use, and vacuum tightness is lower than 10
-1Pa obtains Φ 160-70Kg ingot casting.The impurity element sampling analysis shows: C%=0.026%, (O+N) %=0.045%, H%=0.002%.
Embodiment 2:
TiNi52 (Ti-Ni52at%) alloy Φ 220-130Kg ingot casting melting method: earlier with 0 grade of titanium sponge of starting material, Ni9999 electrolytic nickel according to Ti-Ni52at% (Ti-Ni57.04wt%) proportioning, at the Ti-Ni alloy ingot of the 25Kg intermediate frequency vacuum induction melting Φ 100-15Kg that the CaO crucible is housed.Sampling analysis shows: C%=0.040%, (O+N) %=0.028%, H%=0.002%.With an ingot excision rising head, strip off the skin after the processing, select for use 12 to carry out assembly welding as consumable electrode, weight is 130Kg.Φ 220mm copper crucible is selected in the consumable electrode vacuum furnace melting for use, and vacuum tightness is lower than 10
-1Pa obtains Φ 220-130Kg ingot casting.The impurity element sampling analysis shows: C%=0.042%, (O+N) %=0.037%, H%=0.002%.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification still belong in the scope of technical solution of the present invention.
Claims (10)
1. the preparation method of a low-carbon (LC) hypoxemia Ti-Ni alloy large-sized casting ingot, it is characterized in that: adopt earlier vacuum induction melting to prepare ingot casting of Ti-Ni alloy, again ingot casting assembly welding of Ti-Ni alloy is become consumable electrode and carry out vacuum consumable smelting and become Ti-Ni alloy secondary ingot casting.
2. preparation method as claimed in claim 1 is characterized in that: the 0 grade of titanium sponge of ingot casting raw material selection of described Ti-Ni alloy and the trade mark are the electrolytic nickel of Ni9999.
3. preparation method as claimed in claim 1 is characterized in that: described vacuum induction furnace is the 25Kg vacuum induction furnace.
4. preparation method as claimed in claim 1 is characterized in that: the crucible of described vacuum induction furnace is the CaO crucible.
5. preparation method as claimed in claim 1 is characterized in that: the foreign matter content of an ingot casting of described Ti-Ni alloy is C%≤0.04%, (O+N) %≤0.04%, H%≤0.005%.
6. preparation method as claimed in claim 1 is characterized in that: to an ingot casting excision of Ti-Ni alloy rising head, strip off the skin after the processing, carry out assembly welding as consumable electrode.
7. preparation method as claimed in claim 1 is characterized in that: Φ 160～Φ 220mm copper crucible is selected in the consumable electrode vacuum furnace melting for use, and vacuum tightness is lower than 10
-1Pa.
8. preparation method as claimed in claim 1 is characterized in that: described Ti-Ni alloy secondary ingot casting is 70～130Kg.
9. preparation method as claimed in claim 1 is characterized in that: nickel content is 49～52at% in the described Ti-Ni alloy secondary ingot casting.
10. preparation method as claimed in claim 1 is characterized in that: impurity content is C%≤0.05%, (O+N) %≤0.05%, H%≤0.005% in the described Ti-Ni alloy secondary ingot casting.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567664A (en) * | 2013-10-30 | 2014-02-12 | 西安理工大学 | Ti-Ni welding wire for welding Ti-pipeline steel composite board and preparation method of Ti-Ni welding wire |
| CN106048372A (en) * | 2016-07-06 | 2016-10-26 | 燕山大学 | High-strength high-plasticity titanium-nickel-iron-carbon two-phase alloy and preparation method |
| CN107252889A (en) * | 2017-05-26 | 2017-10-17 | 西安赛特思迈钛业有限公司 | A kind of preparation method of titanium alloy large-sized casting ingot consutrode |
| 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 |
| CN111593231A (en) * | 2020-05-09 | 2020-08-28 | 中国科学院金属研究所 | Preparation method of high-purity NiTi alloy wire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1428448A (en) * | 2001-12-25 | 2003-07-09 | 中国科学院金属研究所 | Vacuum induction smelting process of Ti-Ni and Ti-Ni-Nb marmem |
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2013
- 2013-04-27 CN CN201310152632.5A patent/CN103215459B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1428448A (en) * | 2001-12-25 | 2003-07-09 | 中国科学院金属研究所 | Vacuum induction smelting process of Ti-Ni and Ti-Ni-Nb marmem |
Non-Patent Citations (1)
| Title |
|---|
| 周守理等: "Ni-Ti基形状记忆合金Ф6mm管接头的研制", 《稀有金属材料与工程》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567664A (en) * | 2013-10-30 | 2014-02-12 | 西安理工大学 | Ti-Ni welding wire for welding Ti-pipeline steel composite board and preparation method of Ti-Ni welding wire |
| CN103567664B (en) * | 2013-10-30 | 2015-08-26 | 西安理工大学 | Titanium-pipe line steel composite plate welding Ti-Ni welding wire and preparation method thereof |
| CN106048372A (en) * | 2016-07-06 | 2016-10-26 | 燕山大学 | High-strength high-plasticity titanium-nickel-iron-carbon two-phase alloy and preparation method |
| CN107252889A (en) * | 2017-05-26 | 2017-10-17 | 西安赛特思迈钛业有限公司 | A kind of preparation method of titanium alloy large-sized casting ingot consutrode |
| 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 |
| CN111593231A (en) * | 2020-05-09 | 2020-08-28 | 中国科学院金属研究所 | Preparation method of high-purity NiTi alloy wire |
| CN111593231B (en) * | 2020-05-09 | 2021-08-20 | 中国科学院金属研究所 | Preparation method of high-purity NiTi alloy wire |
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Address after: 710299 No. 10, north section of Weihua Road, Jingwei new town, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee after: Xi'an Saite New Material Technology Co.,Ltd. Address before: No. 46, Fengcheng 3rd Road, Economic and Technological Development Zone, Xi'an City, Shaanxi Province, 721008 Patentee before: Xi'an Saite Metal Materials Development Co.,Ltd. |
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