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High Corrosion-resistant Flux-Cored Wire for Railway Freight Cars

A technology of flux-cored welding wire and high corrosion resistance, which is applied in welding equipment, welding medium, vehicle parts, etc., can solve the problems of not meeting the requirements of corrosion resistance and large differences in corrosion resistance, and achieve good comprehensive performance, good The effect of corrosion resistance and excellent welding process performance

Active Publication Date: 2018-10-09
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The corrosion resistance of the flux-cored welding wire of the existing technology is quite different from that of the new generation of high-strength weathering steel, which cannot meet the requirements of the new generation of high-strength weathering steel for corrosion resistance

Method used

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  • High Corrosion-resistant Flux-Cored Wire for Railway Freight Cars

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Embodiment 1

[0035] Embodiment 1: adopt alkaline medicated powder, the chemical composition mass percent of medicated powder is SiO 2 8.5%, Al 2 o 3 0.8%, CaO 23.6%, K 2 O 0.5%, CO 2 2.9%, C 1.0%, Mn 5.8%, CaF 2 25.3%, the balance is iron and unavoidable impurities.

Embodiment 2

[0036] Embodiment 2: adopt titanium calcium type medicinal powder, the chemical composition mass percent of medicinal powder is SiO 2 19.5%, Al 2 o 3 1.95%, TiO 2 36.8%, CaO 1.1%, K 2 O 1.4%, Na 2 O 1.7%, CO 2 0.6%, C 0.8%, Mn 14.5%, the balance is iron and unavoidable impurities.

Embodiment 3

[0037] Embodiment 3: adopt titanium type medicine powder, the chemical composition mass percentage of medicine powder is SiO 2 21.5%, Al 2 o 3 2.4%, TiO 2 39.8%, K 2 O 1.4%, Na 2O 1.5%, CO 2 0.5%, C 0.6%, Mn 15.5%, the balance is iron and unavoidable impurities.

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Abstract

The invention belongs to the technical field of flux-cored wires, and particularly relates to a highly corrosion resistant flux-cored wire for a railway freight car. The flux-cored wire comprises an outer welding wire and powder contained inside, wherein the deposited metals of the flux-cored wire comprise the following chemical components by mass percent: 0.01-0.15% of C, 0.1-1.5% of Cr, 1.5-5.0% of Ni, 0.1-0.8% of Cu, 0.15-0.6% of Mo, 0.2-1.0% of Si, 0.1-1.5% of Mn, 0.04-0.2% of Ti, 0.01% or less of O, 0.01% or less of N, 0.015% or less of S, 0.015% or less of P, and the balance being Fe and impurities. The deposited metals of the highly corrosion resistant flux-cored wire for the railway freight car have good corrosion resistance and comprehensive performance, and especially good low temperature impact toughness at the temperature of minus 40 DEG C, and the flux-cored wire meets the technical requirements of welding of steel series with high weather resistance, high strength and high toughness for the railway freight car.

Description

technical field [0001] The invention belongs to the technical field of flux-cored welding wires, and in particular relates to a high-corrosion-resistant flux-cored welding wire for railway wagons. The weld seam after welding with the flux-cored welding wire has excellent corrosion resistance and mechanical properties. Background technique [0002] Ordinary weathering steel and high-strength weathering steel have good economic performance, excellent processing performance and comprehensive performance, but their weathering performance cannot meet the current requirements of weathering steel for railway wagons; the weathering performance of stainless steel can meet the requirements of weathering steel for railway wagons, but the price It is expensive, and stainless steel still has certain problems in terms of low temperature toughness and weldability, which restricts its application in railway wagons. In recent years, with the rapid development of the railway industry, the rai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368B23K103/04
CPCB23K35/3066B23K35/368B23K2101/006B23K2103/04
Inventor 马成勇肖晓明肖红军魏金山齐彦昌
Owner CENT IRON & STEEL RES INST