A kind of fe-36ni invar alloy material with excellent thermoplasticity and preparation method thereof

A technology of Invar alloy and fe-36ni, applied in the field of Fe-36Ni Invar alloy material and its preparation, can solve the problems of unstable product quality, prominent contradiction between supply and demand, and high production cost, so as to improve production efficiency and product quality, The effect of reducing production costs and expanding production varieties

Active Publication Date: 2017-09-26
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The poor thermoplasticity of the alloy leads to severe cracking of the alloy during hot processing, unstable product quality, high production cost, low yield and low production efficiency, resulting in a prominent contradiction between supply and demand, which seriously restricts the wide use and mass production of this product

Method used

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  • A kind of fe-36ni invar alloy material with excellent thermoplasticity and preparation method thereof
  • A kind of fe-36ni invar alloy material with excellent thermoplasticity and preparation method thereof
  • A kind of fe-36ni invar alloy material with excellent thermoplasticity and preparation method thereof

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Embodiment Construction

[0029] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described below through examples. In addition, the specific embodiments herein are only used to explain the present invention, not to limit the present invention. On the contrary, the invention covers all such substitutions and modifications within the scope of the invention as defined by the claims.

[0030] The Fe-36Ni Invar alloy material with the required composition is smelted in a vacuum induction furnace. The melting temperature is 1500~1530°C. First add an appropriate amount of Ti, after refining for 2 minutes, then add an appropriate amount of B, and refine for 1 minute. Cool the melt until the temperature drops. To 1450~1460°C, cast the melt under vacuum conditions to obtain a cylindrical ingot with a diameter of 70mm. Under the protective atmosphere, the ingot is heated to 1200°C within 3 hours, forged after 2 hours of heat preserva...

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Abstract

The invention provides a Fe-36Ni Invar alloy material good in thermoplasticity and a preparation method thereof. Chemical components of the material include, by mass, 0-0.05% of C, 0-0.3% of Si, 0-0.02% of P, 0-0.02% of S, 0.15-0.45% of Mn, 0-0.007% of N, 35-37% of Ni, 0.002-0.01% of T[O], 0.035-0.1% of Ti, 0.003-0.015% of B and the balance Fe and inevitable impurities. The preparation method includes the steps that firstly, smelting is conducted; secondly, casting is carried out; thirdly, cast ingots are heated to 1200 DEG C within 3 hours under protective atmosphere, and open forging is conducted after heat preservation is conducted for 2 hours, wherein the deformation amount is 75%, and finish forging temperature is higher than 1050 DEG C; fourthly, forging samples are subjected to heat treatment, and the final Invar alloy material is obtained. The preparation method can improve thermoplasticity of the alloy, and the cracking problem generated in the rolling process is avoided.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a Fe-36Ni Invar alloy material with excellent thermoplasticity and a preparation method thereof. Background technique [0002] In the range of -200 ~ 200 ℃, Invar alloy is a special alloy with a very low thermal expansion coefficient and almost constant thermal expansion coefficient with the change of external temperature. It has abnormal mechanical and magnetic properties. Because of its excellent low expansion characteristics, it was originally mainly used to manufacture precision instruments and parts that require constant dimensions in instruments, such as standard measuring tools and geodesic rulers. It was originally mainly used to manufacture precision instruments and parts that require constant dimensions in instruments, such as standard measuring tools, geodetic rulers, etc. With the expansion of technology and application scope, such as liquefied na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/08C22C38/04C22C38/14C22C38/32C22C33/04C21D1/74C21D8/06C21D6/00
CPCC21D1/74C21D6/001C21D8/06C22C33/04C22C38/04C22C38/08C22C38/14C22C38/32
Inventor 于彦冲穆林王社斌
Owner TAIYUAN UNIV OF TECH
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