CN103215459B - A kind of preparation method of low-carbon (LC) hypoxemia Ti-Ni alloy large-sized casting ingot - Google Patents
A kind of preparation method of low-carbon (LC) hypoxemia Ti-Ni alloy large-sized casting ingot Download PDFInfo
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Abstract
The invention discloses a kind of preparation method of low-carbon (LC) hypoxemia Ti-Ni alloy large-sized casting ingot, first adopt vacuum induction melting to prepare Ti-Ni alloy ingot casting, then Ti-Ni alloy ingot casting assembly welding is become consumable electrode and carry out vacuum consumable smelting and become Ti-Ni alloy secondary ingot casting.Present method is applicable to the titanium nickel binary alloy founding that nickel content is in 49 ~ 52at%, and effectively controls foreign matter content, wherein C%≤0.05%, O+N%≤0.05%, H%≤0.005% etc.Meet the requirement of the fields such as health care to Ti-Ni 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 the large characteristic of shape memory, super-elasticity and high damping three risen in the sixties in 20th century, also has excellent biocompatibility simultaneously, is widely used at medicine and hygiene fields.Titanium nickel medical material mainly refers to the atomic ratio alloy such as two component system TiNi, comprise Medical bone fracture plate, stent, medical catheter, medical filament and extension product (as wire for correcting shape of tooth, inner support, operating sutures etc.) thereof, make full use of its excellent shape memory, super-elasticity and biocompatibility.
The impurity element of medical titanium nickel material alloy has strict requirement, and American Standard ASTM F2063, GB GB24627 clearly represent: C%≤0.05%, (O+N) %≤0.05%, H%≤0.005% etc.Current domestic Ti-Ni alloy ingot generally all adopts the mode of Medium frequency induction melting to obtain, although this method can obtain homogeneous microstructure, the ingot casting that composition proportion is suitable, but because plumbago crucible is selected in melting, the content of C, O element can not effectively control, foreign matter content is relatively high, can not meet the product of the high technology contents such as medical titanium nickel shape memory alloy kapillary, ultrafine wire to the requirement of ingot quality.
Along with the continuous expansion of Ti-Ni alloy range of application and demand, the uniform and stable property of material property there has also been higher requirement.The small-sized ingot casting of 10 ~ 15Kg is generally prepared in the 25Kg Medium frequency induction melting adopted now, and the mobility of alloy is poor, and the restriction of pouring condition, inevitably produces the defect such as pore, cold shut.For improving lumber recovery and the lot stability of material, the development of large-sized casting ingot becomes inevitable trend.
The method that the present invention adopts Medium frequency induction melting to combine with consumable electrode vacuum furnace melting secondary smelting, the strict foreign matter content controlling an induction melting ingot, utilizes self-consuming furnace melting to increase ingot shape, obtains uniform composition, clean Large Titanium nickel ingot casting.
Summary of the invention:
Design of the present invention is, first adopts Medium frequency induction melting to obtain Ti-Ni alloy ingot casting of homogeneous microstructure, and key adopts CaO crucible effectively to reduce alloy impurity content.Be consumable electrode by its assembly welding again, prepared the ingot casting of 70 ~ 130Kg by consumable electrode vacuum furnace melting.
For achieving the above object, technical scheme of the present invention is:
A preparation method for low-carbon (LC) hypoxemia Ti-Ni alloy large-sized casting ingot, first adopts vacuum induction melting to prepare Ti-Ni alloy ingot casting, then Ti-Ni alloy ingot casting assembly welding is become consumable electrode and carry out consumable electrode vacuum furnace melting and become Ti-Ni alloy secondary ingot casting.The foreign matter content of a Ti-Ni alloy ingot casting controls and process before assembly welding, and the vacuum level requirements of consumable smelting is key of the present invention.
Starting material must select 0 grade of titanium sponge, Ni9999 electrolytic nickel, adopt a Ti-Ni alloy ingot of 25Kg intermediate frequency vacuum induction melting 15Kg.Induction melting adopts 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 process, carry out assembly welding as consumable electrode, due to the restriction of electrode length, an ingot number of assembly welding can be selected between 6 ~ 12.Consumable electrode vacuum furnace melting just can obtain, the secondary ingot casting of 70 ~ 130Kg.
Described Ti-Ni alloy ingot casting raw material selection 0 grade of titanium sponge and the trade mark are the electrolytic nickel of Ni9999.
The crucible of described vacuum induction furnace is CaO crucible.
The foreign matter content of a described Ti-Ni alloy ingot casting is C%≤0.04%, (O+N) %≤0.04%, H%≤0.005%.
Described vacuum induction furnace is 25Kg vacuum induction furnace.
Described Ti-Ni alloy ingot casting must excise rising head, after the process that strips off the skin, then carries out assembly welding consumable electrode.
Φ 160 ~ Φ 220mm copper crucible is selected in the melting of described Ti-Ni alloy consumable electrode vacuum furnace, and low vacuum is in 10
-1pa.
Described Ti-Ni alloy secondary ingot casting is 70 ~ 130Kg.
In described Ti-Ni alloy secondary ingot casting, nickel content is 49 ~ 52at%.
In described Ti-Ni alloy secondary ingot casting, impurity content is C%≤0.05%, O+N%≤0.05%, H%≤0.005%.
The present invention compared with prior art has the following advantages: the present invention obtains on the basis of homogeneous titanium nickel ingot casting at induction melting, CaO crucible is adopted effectively to reduce alloy impurity content, again by the melting of secondary self-consuming furnace, achieve the Large Titanium nickel ingot casting of more than the 100Kg meeting the requirement of medical titanium nickelalloy.
Embodiment:
Below the present invention is described in further detail:
Embodiment 1:
The melting method of TiNi49 (Ti-Ni49at%) alloy Φ 160-70Kg ingot casting: first by starting material 0 grade of titanium sponge, Ni9999 electrolytic nickel according to Ti-Ni49at% (Ti-Ni54.08wt%) proportioning, the Ti-Ni alloy ingot of 25Kg intermediate frequency vacuum induction melting Φ 100-15Kg of CaO crucible is being housed.Sampling analysis shows: C%=0.022%, (O+N) %=0.040%, H%=0.002%.By an ingot excision rising head, strip off the skin after process, select 6 to carry out assembly welding as consumable electrode, weight is 70Kg.Φ 160mm copper crucible is selected in consumable electrode vacuum furnace melting, and low vacuum is in 10
-1pa, obtains Φ 160-70Kg ingot casting.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: first by starting material 0 grade of titanium sponge, Ni9999 electrolytic nickel according to Ti-Ni52at% (Ti-Ni57.04wt%) proportioning, the Ti-Ni alloy ingot of 25Kg intermediate frequency vacuum induction melting Φ 100-15Kg of CaO crucible is being housed.Sampling analysis shows: C%=0.040%, (O+N) %=0.028%, H%=0.002%.By an ingot excision rising head, strip off the skin after process, select 12 to carry out assembly welding as consumable electrode, weight is 130Kg.Φ 220mm copper crucible is selected in consumable electrode vacuum furnace melting, and low vacuum is in 10
-1pa, obtains Φ 220-130Kg ingot casting.Impurity element sampling analysis shows: C%=0.042%, (O+N) %=0.037%, H%=0.002%.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when the method and technology contents that can utilize above-mentioned announcement are made a little change or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, still belong in the scope of technical solution of the present invention.
Claims (5)
1. the preparation method of a low-carbon (LC) hypoxemia Ti-Ni alloy large-sized casting ingot, it is characterized in that: first adopt vacuum induction melting to prepare Ti-Ni alloy ingot casting, again by Ti-Ni alloy ingot casting excision rising head, strip off the skin process, and assembly welding becomes consumable electrode and carries out vacuum consumable smelting and become Ti-Ni alloy secondary ingot casting; The crucible of described vacuum induction furnace is CaO crucible; Φ 160 ~ Φ 220mm copper crucible is selected in described consumable electrode vacuum furnace melting, and low vacuum is in 10
-1pa; An ingot number of described assembly welding selects 6 ~ 12, and Ti-Ni alloy secondary ingot casting is 70 ~ 130Kg; In described Ti-Ni alloy secondary ingot casting, impurity content is C%≤0.05%, (O+N) %≤0.05%, H%≤0.005%.
2. preparation method as claimed in claim 1, is characterized in that: described Ti-Ni alloy ingot casting raw material selection 0 grade of titanium sponge 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 25Kg vacuum induction furnace.
4. preparation method as claimed in claim 1, is characterized in that: the foreign matter content of a described Ti-Ni alloy ingot casting is C%≤0.04%, (O+N) %≤0.04%, H%≤0.005%.
5. preparation method as claimed in claim 1, is characterized in that: in described Ti-Ni alloy secondary ingot casting, nickel content is 49 ~ 52at%.
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| 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 |
| CN107252889B (en) * | 2017-05-26 | 2018-11-13 | 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 |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| Ni-Ti基形状记忆合金Ф6mm管接头的研制;周守理等;《稀有金属材料与工程》;19851231(第1期);第19-24、85页 * |
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