Study on the weldability and application of high strength copper structure steel（WA710）

WANG Liang; YIN Yunyang; MU Wenguang

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Study on the weldability and application of high strength copper structure steel（WA710）
Vol. 48, Issue 9, Pages: 37-40(2018)
Published：2018
DOI：
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DOI：

WANG Liang, YIN Yunyang, MU Wenguang. Study on the weldability and application of high strength copper structure steel（WA710）[J]. Eletric Welding Machine2018, 48(9): 37-40. DOI：

摘要

针对我国制造首台最大载重矿车用钢的技术要求及高强度含铜[w（Cu）=1%

.3%]结构钢（WA710）的特点

进行了不同温度条件下的焊接抗裂性试验、气体保护焊工艺等应用实验分析。抗裂（小铁研）试验结果表明:WA710钢在常温及低温（-5℃）、相对湿度80%的环境下

可实施不预热焊接。气体保护焊工艺评定实验结果表明:采用保护气体为φ（Ar）80%+φ（CO

）20%及WER70-NH（专利）焊丝

焊接接头力学性能满足我国首台最大载重（363 t）矿车制造的技术要求。

Abstract

According to the technical requirements for the manufacture of steel for the first mine car of maximum load in China and characteristics of high strength copper-bearing [w（Cu）=1%

.3%] constructional steel（WA710）

applied experimental analysis of experiments of welding crack resistance and gas protection welding technology under different temperature conditions is carried out.The experimental results of crack resistance（small iron test） show that:under environment of room temperature and low temperature（-5 ℃） and environment relative humidity being 80%

it’s allowed not to carry out preheating welding for such steel. Experimental results of gas protection welding process evaluation show that:with the use of protective gas φ（Ar）80%+φ（CO

）20% and WER70-NH（patented） wire

the mechanical properties of welded joints meet the technical requirements for the manufacture of China’s first mining vehicle of maximum load（363 tons）.