激光-等离子弧复合沉积316L不锈钢的组织及性能  

Microstructure and Properties of 316L Stainless Steel Fabricated by Laser-Plasma Transfer Arc Hybrid Deposition Method

作　　者：赵宇辉[1] 贺晨 赵吉宾[1] 张宏伟[2,3] ZHAO Yuhui;HE Chen;ZHAO Jibin;ZHANG Hongwei(Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110000,China;Taizhou Xinma Technology Industry Development Co.,Ltd.,Taizhou 225300,China)

机构地区：[1]中国科学院沈阳自动化研究所,辽宁沈阳110016 [2]中国科学院金属研究所,辽宁沈阳110000 [3]泰州鑫玛科技产业发展有限公司,江苏泰州225300

出　　处：《热加工工艺》2025年第1期109-113,共5页Hot Working Technology

基　　金：国家重点研发计划项目(2022YFB4602203);辽宁省博士科研启动基金计划项目(2022-BS-026);内蒙古自治区重点研发和成果转化计划项目(2023KJHZ0029)。

摘　　要：为了验证激光-等离子弧/复合沉积成形工艺的可行性,首先采用等离子弧增材制造后,在其基础上采用激光沉积工艺复合成形了316L块体试样。采用光学显微镜、扫描电镜、显微硬度仪、拉伸试验机等设备,研究了不同沉积层位置的宏观形貌、微观组织特征、力学性能、断口形貌等。结果表明:等离子弧沉积成形试验的沉积层厚度是激光沉积层的3倍以上。等离子弧沉积层内组织显著粗化,二次枝晶发达,而激光沉积层的硬度高于等离子弧沉积层;两种工艺沉积层形成了良好的冶金结合,界面热影响区厚度小于100μm。虽然,激光-等离子弧复合工艺可以实现316L复合沉积成形,与等离子弧沉积工艺相比,沉积效率有一定优势,但是,复合工艺成形试样的强度和伸长率等性能参数低于等离子弧沉积成形试样。In order to verify the feasibility of laser-plasma arc composite deposition process,the 316L block specimen was manufactured by plasma arc additive manufacturing firstly,then by the laser melting deposition process on the first formed matrix.By using optical microscope,scanning electron microscope,microhardness tester,tensile testing machine and other methods,the macro-morphology,microstructure characteristics,mechanical properties,fracture morphology of different deposition positions were studied.The results show that the thickness of the plasma arc deposition layer is more than 3 times of that of the laser deposition layer.The microstructure of the plasma arc deposition layer is significantly coarsened,and the secondary dendrites are developed.The hardness of the laser deposition layer is higher than that of the plasma arc deposition layer.The deposition layers by the two processes have formed a good metallurgical combination.The thickness of the interface heat affected zone is less than 100μm.Although the laser plasma arc composite process can achieve the composite deposition forming of 316L sample,and it has certain advantages in deposition efficiency compared with the plasma arc deposition process,the strength and elongation of the composite processing sample are lower than those of the plasma arc deposition sample.

关 键 词：激光-等离子弧复合成形 316L不锈钢 微观组织 力学性能 

分 类 号：TG455[金属学及工艺—焊接]