超级钢中厚板焊接工艺对接头冲击韧度的影响  

Effect of Welding Process on Weld Joint Impact Toughness of Ultrafine Grained Steel Plate

作　　者：高彩茹[1] 马金龙[1] 王佳夫[1] 刘相华[1] 吕朝阳[2] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《机械工程材料》2006年第4期5-8,共4页Materials For Mechanical Engineering

基　　金：国家863计划资助项目(2003AA33G010);辽宁省科技计划资助项目(2004221008)

摘　　要：对一种屈服强度为380 MPa、抗拉强度为520 MPa的超级钢中厚板进行气体保护焊工艺及接头冲击韧度研究。结果表明：在电流200～300 A,电压24～33 V,速度16．3 cm/min条件下顺利实现了双面焊接成型,焊后无裂纹,接头质量良好；电流的变化对接头处焊缝韧性影响显著,对其它部位影响不显著；在250 A以上电流焊接,电流增加,有利于焊缝韧性的改善,但以增加焊缝的宽度为代价；电流增加,热输入增加,焊缝宽度增加,对热影响区宽度影响不大。The gas shielded arc welding process and weld joint impact toughness of an ultrafine grained steel plate with 380 MPa yield strength and 520 MPa tensile strength were studied. The welding by both sides could be carried out at 200～300 A weld current, 24～33 V weld voltage and 16.3 cm/min weld velocity with almost no weld cracks. The effect of electric current on the impact toughness of weld was much more remarkable than on that of other parts in weld joint when operated at above 250 A, the weld toughness increased obviously, and weld width also increased with almost no influence on the width of HAZ.

关 键 词：超级钢 Ar+CO2保护焊 焊接工艺 冲击韧度 

分 类 号：TG146.1[一般工业技术—材料科学与工程]