摘要
采用光学显微镜、拉伸试验机等研究了热输入对430铁素体不锈钢TIG焊接接头显微组织、力学性能和抗腐蚀性能的影响。结果表明:随焊接热输入增加,母材的铁素体晶粒急剧粗化。热影响区的粗晶区和焊缝区的多边形铁素体晶粒尺寸增加,晶粒粗化。静态拉伸强度及伸长率呈下降趋势,在低热输入37.12 J·mm^(-1)时,接头的静态拉伸强度及伸长率最高,焊接接头抗腐蚀性能随热输入的增加而降低。
The influences of heat input on the microstructure, mechanical and corrosion resistance properties of 430 ferritic stainless steel TIG welded joint were studied by microstructure observation and tensile test. The results show that, with the increase of welding heat input, the ferrite grain of parent mental coarsens sharply. The polygonal ferrite grain size in coarse grain zone of heat affected zone and in weld area increases, the grain is obviously coarsening. Static tensile strength and elongation is in decline, at the low heat input of 37.12 J·mm^(-1), the static tensile strength and elongation is the highest, the corrosion resistance of the weld joint decreases with the increase of heat input.
出处
《铸造技术》
CAS
北大核心
2016年第8期1730-1732,共3页
Foundry Technology
关键词
430铁素体不锈钢
热输入
显微组织
力学性能
430 ferritic stainless steel
heat input
microstructure
mechanical properties
