理化检验-物理分册2024，Vol.60Issue(7)：5-12,8.DOI:10.11973/lhjy-wl240141
焊接热输入对1 000MPa级马氏体钢焊接接头组织和性能的影响
The effect of welding heat input on the microstructure and properties of welded joints of 1 000 MPa grade martensitic steel
摘要
Abstract
The welding of 1.8 mm thick 1 000 MPa grade martensitic steel was carried out using the method of melting electrode gas shielded welding.The influence of welding heat input on the hardness distribution,microstructure evolution,and mechanical properties of welded joints was systematically studied.The results show that compared with the base metal,the hardness of the weld and heat affected zone underwent varying degrees of softening,with the softening phenomenon in the fine-grained zone being the most significant.As the welding heat input increased,the strength and plasticity of the welded joint decreased,while the toughness increased.The hardness of the weld zone,critical zone,and subcritical zone slightly decreased,while the hardness of the coarse-grained and fine-grained zones slightly increased.There was no significant change in the impact performance of the weld and heat affected zone,and the fracture position of the joint changed from fine-grained zone to subcritical zone.关键词
焊接热输入/热影响区/MS1000马氏体钢/力学性能/显微组织Key words
welding heat input/heat affected zone/MS1000 martensitic steel/mechanical property/microstructure分类
矿业与冶金引用本文复制引用
王月,董现春,赵英建,李晓林,陈树海..焊接热输入对1 000MPa级马氏体钢焊接接头组织和性能的影响[J].理化检验-物理分册,2024,60(7):5-12,8.基金项目
国家自然科学基金项目(52275) （52275）
