焊接工艺参数对Q460GJC钢热影响区最高硬度的影响  

Influence of welding parameters on maximum hardness in heat-affected zone of Q460GJC steel

作　　者：符定梅[1] 李业绩[2] 刘菲[2] 段斌[2] 马德志[2] 

机构地区：[1]中冶建筑研究总院有限公司企业发展部,北京100088 [2]中冶建筑研究总院有限公司钢结构事业部,北京100088

出　　处：《钢铁研究》2017年第3期36-39,共4页Research on Iron and Steel

摘　　要：焊接热影响区最高硬度试验能够用于评价钢板的抗冷裂纹性能。研究了焊接工艺对20 mm厚新型建筑用高性能结构钢Q460GJC的热影响区最高硬度的影响,结果表明:当选用较小线能量(9.0~10.0kJ/cm)的焊接工艺参数时,Q460GJC钢热影响区的最高硬度都大于350 HV,冷裂纹倾向较大;当选用较大线能量(14.5~15.5 kJ/cm)的焊接工艺参数时,Q460GJC钢热影响区的最高硬度都小于350HV,冷裂纹倾向降低。The maximum hardness test in the heat-affected zone can be used to evaluate the cold crack resistance of steel plates. The influence of welding process parameters on the maximum hardness in the heat affected zone of a new type high performance structural steel Q460GJC with thickness of 20 mm was studied. The results showed that the maximum hardness in the heat-affected zone of Q460GJC steel was greater than 350 HV and the cold cracking tendency was larger while selecting small line energy （9.0 - 10.0 kJ/cm）. The maximum hardness in the heat-affected zone of Q460GJC steel was less than 350 HV and the cold cracking tendency was reduced while selecting large line energy （14.5 - 15.5 kJ/cm）.

关 键 词：焊接工艺参数 Q460GJC钢 热影响区 最高硬度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]