摘要
目前高强钢WH70 (σb=710MPa)在常温下 (大于 15℃ )焊接时 ,焊前需要预热、焊后需要退火。为此 ,对其焊接接头进行了试验 ,目的是为了实现在室温下焊接。试验采用CO2 气体保护焊 ,选用Q5 5 0高强度焊丝 ,同时就高强钢焊接性特点 ,制定了一整套焊接工艺。试验结果表明 ,采用Q5 5 0高强度焊丝 ,在对焊接工艺进行优化的情况下 ,可以实现高强钢WH70在常温下焊接。
When high strength steels WH70( σ b=710 MPa) was welded in room temperature (>15℃) at present,the welding component must be taken some welding procedures such as preheating and annealing.To weld WH70 steel in room temperature,experiments of weldability were carried out.Experiments adopted CO 2 shielded welding,choosed Q550 high strength welding wire and established a complete set of welding procedures.Experimental results show that WH70 steel is welded successfully in room temperature under the condition that choosing Q550 welding wire and optimizing welding procedure.
出处
《煤矿机械》
北大核心
2003年第4期23-25,共3页
Coal Mine Machinery
