Preparation method of low-carbon and low-oxygen titanium-nickel alloy large ingot

A technology of titanium-nickel alloy and nickel alloy, which is applied in the field of smelting large ingots of low-carbon and low-oxygen titanium-nickel shape memory alloys. It can solve the problems of poor alloy fluidity and achieve the effect of reducing the content of alloy impurities.

Active Publication Date: 2013-07-24
西安赛特新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 25Kg intermediate frequency induction melting used today generally produces small ingots of 10-15Kg, and the fluidity of the alloy is poor, and the limitations of pouring conditions inevitably produce defects such as pores and cold shuts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The smelting method of TiNi49 (Ti-Ni49at%) alloy Φ160-70Kg ingot: first, the raw material 0-grade sponge titanium and Ni9999 electrolytic nickel are mixed according to the ratio of Ti-Ni49at% (Ti-Ni54.08wt%), in a CaO crucible 25Kg intermediate frequency vacuum induction melting Φ100-15Kg primary titanium-nickel alloy ingot. Sampling analysis shows: C%=0.022%, (O+N)%=0.040%, H%=0.002%. Cut off the riser of the primary ingot, peel off the skin, and select 6 for assembly welding as consumable electrodes with a weight of 70Kg. Φ160mm copper crucible is used for smelting in vacuum consumable furnace, and the vacuum degree is lower than 10 -1 Pa, obtain Φ160-70Kg ingot. Sampling and analysis of impurity elements showed: C%=0.026%, (O+N)%=0.045%, H%=0.002%.

Embodiment 2

[0024] The smelting method of TiNi52 (Ti-Ni52at%) alloy Φ220-130Kg ingot: first, the raw material 0-grade sponge titanium and Ni9999 electrolytic nickel are mixed according to the ratio of Ti-Ni52at% (Ti-Ni57.04wt%) in a crucible equipped with CaO 25Kg intermediate frequency vacuum induction melting Φ100-15Kg primary titanium-nickel alloy ingot. Sampling analysis shows: C%=0.040%, (O+N)%=0.028%, H%=0.002%. Cut off the riser of the primary ingot, peel off the skin, and select 12 for assembly welding as consumable electrodes, with a weight of 130Kg. Φ220mm copper crucible is used for smelting in vacuum consumable furnace, and the vacuum degree is lower than 10 -1 Pa, obtain Φ220-130Kg ingot. Sampling and analysis of impurity elements showed: C%=0.042%, (O+N)%=0.037%, H%=0.002%.

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PUM

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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: [0001] The invention relates to a method for melting a titanium-nickel alloy, in particular to a method for melting a large ingot of a low-carbon and low-oxygen titanium-nickel shape memory alloy. Background technique: [0002] Titanium-nickel-based shape memory alloy is a new type of metal functional material that emerged in the 1960s with three characteristics: shape memory, superelasticity and high damping. It also has excellent biocompatibility and has been widely used in the medical and health field. Wide range of applications. Titanium-nickel medical materials mainly refer to binary system TiNi and other atomic ratio alloys, including medical bone plates, intravascular stents, medical catheters, medical filaments and their extended products (such as dental orthopedic wires, internal stents, surgical sutures, etc.), fully Take advantage of its excellent shape memory, superelasticity and biocompatibility. [0003] Medical titanium-nickel materials have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/16
CPCY02P10/25
Inventor 毛江虹曹继敏杨华斌牛中杰雷亚军薛飒
Owner 西安赛特新材料科技股份有限公司
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