Method for preparing high-tensile-ductility Ni (Bi) alloy

A tensile plasticity and alloy technology, which is applied in the testing and heat treatment process, the smelting and processing of Ni alloys, and the preparation of high tensile plasticity Ni alloys, which can solve the problems of low tensile plasticity of Ni(Bi) alloys.

Inactive Publication Date: 2014-04-02
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to prepare Ni(Bi) alloy with high tensile plasticity and solve the defect of low tensile plasticity of existing Ni(Bi) alloy

Method used

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  • Method for preparing high-tensile-ductility Ni (Bi) alloy
  • Method for preparing high-tensile-ductility Ni (Bi) alloy
  • Method for preparing high-tensile-ductility Ni (Bi) alloy

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Embodiment 1

[0045] (1) High-purity electrolytic Ni plate is used as raw material, the thickness of Ni plate is between 2 and 3 mm, and the composition is shown in Table 1.

[0046] Table 1 Chemical composition of high-purity Ni (wt ppm)

[0047]

[0048] (2) The high-purity electrolytic Ni plate was cut into particles by mechanical shears, and then the particles were ultrasonically cleaned in 4 mol / L hydrochloric acid solution for 5 minutes, and then ultrasonically cleaned in distilled water for 5 minutes.

[0049] (3) The cleaned particles are dried in a constant temperature drying oven at a temperature of 120° C. for 10 hours.

[0050] (4) Mix high-purity Ni particles and high-purity Bi according to the molar ratio of Ni:Bi=99.9:0.1, and put them into a vacuum induction melting furnace.

[0051] (5) Pump the vacuum degree of the vacuum induction melting rate to 5×10 -3 Pa.

[0052] (6) Slowly raise the melting temperature to 1530° C. and keep it at 1530° C. for 5 minutes.

[0053...

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Abstract

The invention belongs to the field of nickel-base alloys, and relates to a method for preparing a high-tensile-ductility Ni (Bi) alloy, which comprises the following steps: carrying out vacuum smelting on raw materials high-purity Ni and high-purity Bi to prepare an Ni (Bi) alloy, and carrying out isothermal heat treatment on the Ni (Bi) alloy at 645-655 DEG C, thereby finally obtaining the high-tensile-ductility high-service-reliability Ni (Bi) alloy. The invention reduces the volatilization amount of the Bi element, accurately controls the Bi content, enhances the utilization ratio of the alloy, and lowers the cost. The average tensile ductility of the Ni (Bi) alloy prepared by the method provided by the invention is up to 56.11%, and can reach 65.92% to the maximum; and thus, the invention has favorable application prospects.

Description

technical field [0001] The invention belongs to the field of nickel-based alloys, and relates to a method for preparing high-stretch plastic Ni(Bi) alloys, in particular to the melting, processing, testing and heat treatment process of Ni(Bi) alloys whose Bi content is in the order of ppm. Background technique [0002] Ni(Bi) alloy has excellent electrical conductivity and magnetic properties, and is currently used in aerospace, petrochemical, transportation, electronic information and other electrical components and magnetic conversion devices. However, for metal materials, even if they contain a very small amount of harmful impurity elements (such as P, S, As, Sb, Bi in about ten or tens of ppm), it will affect the impact performance, tensile properties, Mechanical properties such as creep properties have a great influence. It can be seen that although Ni(Bi) alloy has excellent physical properties, its application in a wider range will be limited due to the adverse effec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10
Inventor 郑磊齐琳杨武强何飞霞张彬彬
Owner UNIV OF SCI & TECH BEIJING
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