【摘要】 以X70管线钢为对象 ,研究了双丝埋弧焊工艺参数对焊接接头金相组织与力学性能的影响。结果表明 ,焊接热输入是影响焊缝及热影响区韧性的主要因素更多还原

【Abstract】 this paper studies the influence of welding parameters on microstructure and mechanical properties of welded joint using double wires submerged arc welding process. The results show that toughness of weld metal and HAZ are mainly affected by welding heat input.更多还原