【摘要】 利用焊接热模拟技术,通过设定不同的热输入量、不同的峰值温度,模拟低合金高强度钢板Q390M不同的焊接热影响区。结果表明焊接热输入量在15～25kJ/cm时,回火区、不完全相变区、正火区、淬火区四个不同的热影响区低温性能均表现良好。采用CO₂气体保护焊、20kJ/cm的焊接热输入量对35mm的Q390M进行焊接,焊接接头性能优良,可满足E级钢的要求。更多还原

【Abstract】 By using welding heat simulation technology,different heat input and peak temperature are set to simulate the welding heat affected zone of Q390M low alloy high strength steel plate.The results show that at 15～25 kJ/cm,the low temperature performance of tempering zone,incomplete phase change zone,normalizing zone and quenching zone is good.The Q390M of 35 mm is welded by CO₂ gas shielded welding and 20 kJ/cm welding heat input.The welding joint has excellent performance and can meet the requirements of grade E steel.更多还原