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High-strength low-expansion invar alloy wire rod and manufacturing method thereof

A technology of Invar alloy and manufacturing method, which is applied in the field of high-strength and low-expansion Invar alloy wire and its production, can solve the problems of high-strength Invar alloy cost and limit wide application, and achieve low alloy cost and high expansion coefficient. Low, the effect of improving toughness

Active Publication Date: 2021-05-04
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some iron and steel companies in Japan use this method to produce high-strength Invar alloys, but the high cost of high-strength Invar alloys for industrial applications currently limits their wide application

Method used

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  • High-strength low-expansion invar alloy wire rod and manufacturing method thereof
  • High-strength low-expansion invar alloy wire rod and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) Vacuum induction furnace smelting to obtain alloys with high purity. C is formulated up to 0.60%, and added in the early stage of charging. When melting, first preheat the material in the crucible with 20% of the rated power, and vacuum until the vacuum degree is ≤2.7Pa. Then increase the power to more than 90% of the rated power until it is completely melted, then add Si, V-Fe and other alloys, continue heating for 20 minutes, wait until the alloys are completely melted, increase the temperature of molten steel to T=1530°C, and keep the refining time for 8 minutes , when the temperature reaches 1590°C, then reduce the power to 30% of the rated power for heat preservation refining, and the refining time is 60 minutes. Sampling and analysis of components during refining and heat preservation, fine-tuning of components, adding metal Mn after filling Ar6666Pa, melting with 90% of rated power, sampling and analysis after complete melting, tapping out after qualified com...

Embodiment 2

[0060] 1) Vacuum induction furnace smelting to obtain alloys with high purity. C is highly formulated to 0.55%, and added in the early stage of charging. When melting, preheat the material in the crucible with 25% of the rated power, and then vacuum until the vacuum degree is ≤2.7Pa. Then the power is increased to more than 90% of the rated power until it is completely melted, then alloys such as Si and V-Fe are added, and the heating is continued for 20 minutes. 15min, when the temperature reaches 1570°C, then reduce the power to 40% of the rated power for heat preservation refining, and the refining time is 60min. Sampling and analysis of components during refining and heat preservation, fine-tuning of components, adding metal Mn after filling Ar6666Pa, melting with 90% of rated power, sampling and analysis after complete melting, tapping out after qualified components, and casting into electrode rods.

[0061] 2) Electroslag remelting: using quaternary slag-based CaF 2 :...

Embodiment 3

[0067] 1) Vacuum induction furnace smelting to obtain alloys with high purity. C is highly formulated to 0.58%, and added in the early stage of charging. When melting, first preheat the material in the crucible with 30% of the rated power, and vacuum until the vacuum degree is ≤2.7Pa. Then the power is increased to more than 90% of the rated power until it is completely melted, then alloys such as Si and V-Fe are added, and the heating is continued for 20 minutes. 20min, when the temperature reaches 1580°C, then reduce the power to 35% of the rated power for heat preservation refining, and the refining time is 60min. Sampling and analysis of components during refining and heat preservation, fine-tuning of components, adding metal Mn after filling Ar6666Pa, melting with 90% of rated power, sampling and analysis after complete melting, tapping out after qualified components, and casting into electrode rods.

[0068] 2) Electroslag remelting: using quaternary slag-based CaF 2 ...

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Abstract

The invention discloses a high-strength low-expansion invar alloy wire rod. The high-strength low-expansion invar alloy wire rod is characterized in that chemical components of alloy steel comprises, by weight, 0.41-0.60% of C, being equal to or less than 0.40% of Si, 0.20-0.60% of Mn, being equal to or less than 0.02% of P, being equal to or less than 0.02% of S, 35.1-37% of Ni, 1.51-3.0% of Mo, 0.5-0.99% of V, being equal to or less than 1.0% of Co, and the balance Fe and inevitable impurities. The total amount of impurity elements is less than 0.05%. The invention further provides a manufacturing method of the wire rod. The manufacturing method comprises the steps that vacuum induction furnace smelting is conducted, electrode bar electroslag remelting is conducted to form a steel ingot, the steel ingot is forged into a square billet, the forged square billet is hot-rolled into a small-specification wire rod, the hot-rolled wire rod is subjected to solution treatment, and the wire rod subjected to bright tempering is drawn into the finished wire rod according to a conventional process. According to the manufacturing method, through proper heat treatment and cold drawing processes and depending on carbide strengthening, solid solution strengthening and deformation strengthening, the obdurability of an alloy is improved, lower expansion performance is ensured to be obtained, and the alloy is low in cost and wide in application prospect.

Description

technical field [0001] The invention relates to the field of Invar alloys, and mainly relates to a high-strength and low-expansion Invar alloy wire rod and a production method thereof. Background technique [0002] Fe-Ni36 Invar alloy has been widely valued and applied because of its good expansion properties. It can be used to make structural components of precision laser and optical measurement systems, liquefied natural gas storage tanks, long-distance power transmission lines, and antenna deformation control equipment. , Large aircraft composite molds, etc. [0003] Fe-Ni36 Invar alloy plays an important role in different fields because of its unique properties. However, the strength and hardness of common Fe-Ni36 Invar alloys are very low, which limits its use as structural materials. In recent years, some high-strength Invar alloys have also been developed. For example, in the power industry, the aluminum-clad steel core used for double-capacity wires is a high-stren...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/12C21D8/06C21D1/74C21D1/18C22C33/04
CPCC22C38/02C22C38/04C22C38/002C22C38/08C22C38/12C21D8/065C21D1/18C21D1/74C22C33/04
Inventor 田玉新陆建生王雪听赵欣
Owner 宝武特种冶金有限公司
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