摘要
分别采用CMT+P和CMT这2种焊接模式进行304奥氏体不锈钢电弧增材制造构件打印,借助金相显微镜、扫描电子显微镜研究了不同电弧增材工艺打印构件的显微组织和力学性能。结果表明:采用CMT+P和CMT这2种焊接模式电弧增材制造304奥氏体不锈钢具有良好的成形性;2种打印模式下成形构件的显微组织均由奥氏体+δ铁素体+σ相组成;2种打印模式下电弧增材制造不锈钢构件均具有良好的力学性能,因脉冲能细化晶粒使得CMP+P的拉伸性能优于CMT的;硬而脆的σ相降低了构件的冲击韧性,但构件断裂方式均为韧性断裂。
The printing of 304 austenitic stainless steel arc additive components were carried out by CMT +P and CMT welding modes respectively. The microstructure and properties of the printing components with different arc addition processes were studied by means of optical microscope and scanning electron microscope. The results showed that the 304 austenitic stainless steel produced by arc additive in CMT + P and CMT welding modes had good formability, and the microstructure of the parts formed under the two printing modes was composed of austenite + δ-ferrite + σ phase, the tensile properties of CMT + P were better than that of CMT because the pulse could refine the grain, the hard and brittle σ phase reduced the impact toughness of the component, but the fracture mode was ductile fracture.
作者
侯旭儒
徐东安
王艳杰
曹洋
赵琳
马成勇
彭云
HOU Xu-ru;XU Dong-an;WANG Yan-jie;CAO Yang;ZHAO Lin;MA Cheng-yong;PENG Yun(Welding Research Institute,Central Iron and Research Institute,Beijing 100081,China;The Second Military Representative Office of Shenyang Regional Military Representative Bureau,Shenyang 110004,Liaoning pro.,China;School of Material Engineering,North China Institute of Aerospace Engineering,Langfang 065000,Hebei pro.,China)
出处
《焊接技术》
2021年第8期6-10,I0011,共6页
Welding Technology
基金
国家重点研发计划资助(2017YFB1103700,2017YFB1103703)
廊坊市科学技术研究与发展计划项目(2019011019)。
关键词
电弧增材制造
304不锈钢
脉冲
显微组织
力学性能
wire arc additive manufacture
304 stainless steel
pulse
microstructure
mechanical properties
