MH600DP與MH540FB雙相鋼MAG焊焊接性研究

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摘要：通過碳當(dāng)量和冷裂紋敏感系數(shù)計(jì)算，以及硬度、金相組織檢測等試驗(yàn)方法，對汽車輪輻和輪輞用鋼熱軋馬氏體雙相鋼MH600DP和貝氏體雙相鋼MH540FB的焊接性，以及MAG焊角接接頭焊縫組織、顯微硬度分布進(jìn)行了研究。研究成果具有一定的現(xiàn)實(shí)意義和應(yīng)用價(jià)值。

關(guān)鍵詞：雙相鋼；MAG焊；顯微組織；顯微硬度

Research on the weldability of MH600DP and MH540FB dual phase steel by MAG welding

WU Xinghuan1， LAI Chunming1， PENG Sihan2

1.School of Mechanical Engineering， Hunan Chemical Vocational and Technical College， Zhuzhou 412000， Hunan， China

2.CRRC Zhuzhou Electric Locomotive Co.， Ltd.， Zhuzhou 412000， Hunan， China

Abstract： Investigates the weldability of hot-rolled martensitic dual-phase steel MH600DP and bainitic dual-phase steel MH540FB for automotive wheel spokes and rims through calculations of carbon equivalent， cold cracking sensitivity coefficient， hardness， and metallographic analysis. The research includes the study of MAG welded butt joint weld seam structure and microhardness distribution. The research findings have certain practical significance and application value.

Keywords： dual-phase steel; MAG welding; microstructure; microhardness

1 序言

為了實(shí)現(xiàn)“碳達(dá)峰”這個(gè)宏偉目標(biāo)，就要求汽車提高燃油效率并減少尾氣排放。（剩余3745字）