Chromium oxide green 308 austenitic stainless steel metal core welding stick and preparation method thereof

A technology of austenitic stainless steel and metal core, applied in metal processing equipment, welding equipment, welding equipment, etc., can solve the problem of high cost of stainless steel strip, and achieve the effect of excellent comprehensive performance, beautiful weld shape and small spatter

Active Publication Date: 2013-04-03
科威尔焊接(江苏)有限公司
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Problems solved by technology

At the same time, the stainless steel flux cored wire is made of 304L stainless steel strip rolling and drawing, and the cost of stainless steel strip is relatively high

Method used

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  • Chromium oxide green 308 austenitic stainless steel metal core welding stick and preparation method thereof
  • Chromium oxide green 308 austenitic stainless steel metal core welding stick and preparation method thereof

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[0022] 1. A low-hexavalent chromium 308 austenitic stainless steel metal-cored welding wire, the mass percentage of the chemical composition in the welding wire is: C: 0.03wt.%; Cr: 48wt.%; Ni: 24wt.%; Mn: 4wt.%; Si: 0.66wt.%; Ti: 0.5wt.%; Zn: 0.5wt.%; Zr: 0.5wt.%; Fe: balance. The filling rate of the powder in the steel belt is 26%. Using 95%Ar+5%O 2 The welding process parameters of gas shielded welding are: voltage 25V; current 210A; wire feeding speed 420mm / min; gas flow rate 20L / min; The composition of the deposited metal prepared by the above process is: Cr: 19.2wt.%; Ni: 9.1wt.%; Mn: 1.2wt.%; Si: 0.41wt.%;

[0023] 2. A low-Cr (VI) 308 austenitic stainless steel metal-cored welding wire. The mass percentage of the chemical composition in the welding wire is: C: 0.03wt.%; Cr: 52wt.%; Ni: 26wt.%; Mn: 4wt.% ; Si: 0.66wt.%; Ti: 0.5wt.%; Zn: 0.5wt.%; Zr: 0.5wt.%; The filling rate of the powder in the steel belt is 28%. Using 96%Ar+4%O 2 The welding process parameters o...

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Abstract

The invention relates to a chromium oxide green 308 austenitic stainless steel metal core welding stick and a preparation method thereof, and the welding stick and the preparation method thereof belong to the technical field of welding materials. The chemical components of the powder of a metal core are as follows: 0.03 weight percent to 0.065 weight percent of carbon (C), 52 weight percent to 58 weight percent of chromium (Cr), 26 weight percent to 30 weight percent of nickle (Ni), 4 weight percent to 6 weight percent of manganese (Mn), 0.66 weight percent to 1.5 weight percent of silicon (Si), 0.5 weight percent to 1 weight percent of titanium (Ti), 0.5 weight percent to 1 weight percent of zinc (Zn), 0.5 weight percent to 1 weight percent of zirconium (Zr), less than 0.03 weight percent of phosphorus (P), less than 0.03 weight percent of sulfur (S) the rest of ferrum (Fe). The filling rate is 26 percent to 38 percent. According to the chromium oxide green 308 austenitic stainless steel metal core welding stick and the preparation method thereof, under the condition of a little smaller amount of welding dust, the emission of toxic Cr (VI) can be reduced by 30 percent to 40 percent compared with the solid welding stick of the same type, and by 35 percent to 45 percent compared with a stainless steel flux-cored welding stick. Due to the adoption of the low-carbon steel strip, the cost of the welding stick can be greatly reduced, the welding stick has stable welding arc and little splash, a formed welding seam is attractive, and the comprehensive properties of deposited metal are excellent.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a low-hexavalent chromium (Cr(VI)) and low-cost gas-shielded 308 austenitic stainless steel metal-cored welding wire. Background technique [0002] Harmful gases and smoke are unavoidably produced during stainless steel welding, which directly affect the protection of the environment and the health of welders. At the same time, the stainless steel flux cored wire is made by rolling and drawing of 304L stainless steel strip, and the cost of stainless steel strip is relatively high. [0003] The present invention is to develop a low-hexavalent chromium (Cr(VI)), low-cost austenitic stainless steel metal-cored welding wire. Today, when stainless steel is widely used and environmental protection is emphasized, Cr(VI) in welding fumes has attracted widespread attention. It has been shown to be carcinogenic in humans and can cause numerous other health problems, such as inha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23K9/16
Inventor 栗卓新高丽脂李国栋李辉李红白建涛焦俊马司鸣
Owner 科威尔焊接(江苏)有限公司
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