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Fe-Ni invar alloy welding wire and manufacturing method thereof

A technology of Invar alloy and manufacturing method, applied in the field of alloy welding wire and its production, can solve the problems of high content, low expansion and high cost, and achieve the effects of low expansion performance, low manufacturing cost, and improved strength and toughness

Active Publication Date: 2018-04-03
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

[0005] Patent document CN103084753 discloses a nickel-iron precision alloy welding wire, its main chemical composition is: 0.1-0.2% C, 0.2-0.3% Si, 0.4-0.5% Mn, 35-37% Ni, 0.4-0.5% Ti, 1.0 -1.2%Nb, the welding wire of this invention can improve the tensile strength of the weld, ensure the toughness and low expansion performance of the weld metal, and can be applied to the welding field of nickel-iron series precision alloy materials, but the content of the precious element Nb in the alloy is relatively high high, high cost

Method used

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  • Fe-Ni invar alloy welding wire and manufacturing method thereof
  • Fe-Ni invar alloy welding wire and manufacturing method thereof
  • Fe-Ni invar alloy welding wire and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0050] According to the above-mentioned smelting method, the molten steel with chemical composition A1 was prepared. The vacuum treatment time was 15 minutes below 66.7 Pa. After the vacuum treatment, the bottom blowing Ar stirring time was 20 minutes. The pouring temperature was 1480 ° C, pouring 2.3 tons of steel ingots, and the heating temperature of the steel ingots was 1180 ° C. , heat preservation for 3 hours, starting rolling temperature 1090°C, final rolling temperature 870°C, rolled finished Φ5.5mm wire rod, solid solution at 950°C, water cooling after heat preservation for 2h, and cold drawing into Φ1.2mm wire rod according to the conventional process.

Embodiment 2

[0052] According to the above-mentioned smelting method, the molten steel with chemical composition A2 was prepared. The vacuum treatment time was 18 minutes below 66.7 Pa. After the vacuum treatment, the bottom blowing Ar stirring time was 20 minutes. The pouring temperature was 1485 ° C, pouring 2.3 tons of steel ingots, and the heating temperature of the steel ingots was 1150 ° C. , heat preservation for 3 hours, starting rolling temperature 1060°C, final rolling temperature 820°C, rolled finished Φ5.5mm wire rod, solid solution at 980°C, water cooling after heat preservation for 2 hours, and cold drawing into Φ1.2mm wire rod according to the conventional process.

Embodiment 3

[0054] According to the above-mentioned smelting method, the molten steel with the chemical composition A3 was prepared, and the vacuum treatment time was 15 minutes below 66.7 Pa. After the vacuum treatment, the bottom blowing Ar stirring time was 22 minutes. The pouring temperature was 1190 ° C, pouring 2.3 tons of steel ingots, and the heating temperature of the steel ingots was 1160 ° C. , heat preservation for 3 hours, starting rolling temperature 1090°C, final rolling temperature 850°C, rolled finished Φ5.5mm wire rod, solid solution at 1100°C, water cooling after heat preservation for 2 hours, and cold drawing into Φ1.2mm wire rod according to the conventional process.

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Abstract

The invention discloses a Fe-Ni invar alloy welding wire. The Fe-Ni invar alloy welding wire comprises the following chemical components in proportion by weight: 0.04-0.10% of C, not greater than 0.25% of Si, 0.2-0.4% of Mn, not greater than 0.08% of P, not greater than 0.003% of S, 35-38% of Ni, 0.2-0.5% of Cr, 0.08-0.15% of V and the balance Fe and inevitable impurities, wherein the total of theinevitable impurities is less than 0.05wt%. The invention further provides a preparation method for the Fe-Ni invar alloy welding wire. The preparation method comprises the steps of smelting, die casting, rolling, solution treatment and production adopting a cold-drawing process. According to the preparation method disclosed by the invention, the strength and toughness of deposited metal is improved and low expansion performance is ensured through increasing the content of C and appropriately adding the elements of Cr, V and the like, and by virtue of carbide strengthening and solution strengthening; and the Fe-Ni invar alloy welding wire is low in manufacturing cost, excellent in welding process performance and wide in application.

Description

technical field [0001] The invention relates to the field of welding wire production, in particular to an alloy welding wire 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 is known as the "King of Metals" and has incomparable advantages in precision instruments. For example, it is used as a structural element in precision lasers, optical measurement systems and waveguides, and as a support system for huge lenses in microscopes and astronomical telescopes. In the field of special structural materials, it is also used in liquefied petroleum gas storage tanks, long-distance power transmission lines, antenna deformation control equipment, and molds for large aircraft composite materials. Fe-Ni36 Invar alloy plays an important role in different fields because of its unique properties. In recent years, with the improvement of national environmental protection requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3066B23K35/40
Inventor 田玉新陆建生赵欣朱双春王雪听
Owner 宝武特种冶金有限公司
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