机械科学与技术2018，Vol.37Issue(3)：456-460,5.DOI:10.13433/j.cnki.1003-8728.2018.0320
304/304L不锈钢TIG焊两种搭接接头的组织及力学性能
Microstructure and Properties of Different TIG Lap Joint of 304/304L
金雪 1朱平 2李晗 1秦兴元2
作者信息
- 1. 上海交通大学机械系统与振动国家重点实验室,上海200240
- 2. 上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240
- 折叠
摘要
Abstract
There exists two stress state by the tensile force and shear force of lap joint weld,the differences of mechanical performance make sense for choosing weld form in engineering application.Tungsten inert gas (TIG) is used to weld 304 and 304L stainless steel.With metallographic,hardness,quasi static tensile and fatigue experiments,the structure microstructure,hardness distribution and mechanical properties of two different laps are obtained.The results show that the lap weld joint from the parent metal to the welding is divided into seven areas for the difference of microstructure.Besides,the tensile sample's elongation rate is of 19.3％ and fructures at differences in the organization,while the shear sample's elongation rate is of 12.7％ and fructures for size changing and stress concentration.The tensile sample has higher fracture toughness,tensile strength and fatigue damage properties,while joint strength of shear sample is significantly affected by the change in structure size and the stress concentration.关键词
304L不锈钢/搭接接头/微观组织/拉伸试验/疲劳试验Key words
lap weld/microstructure/experiments/mechanical properties/fatigue damage分类
矿业与冶金引用本文复制引用
金雪,朱平,李晗,秦兴元..304/304L不锈钢TIG焊两种搭接接头的组织及力学性能[J].机械科学与技术,2018,37(3):456-460,5.
