摘要
文中采用激光焊接技术连接316L不锈钢SLM成形件与锻件,进行工艺优化并对其接头微观组织与性能进行研究。结果表明,该接头具有良好的激光焊接性能,无明显缺陷。激光焊接接头和SLM成形件的显微组织为柱状晶粒内的奥氏体基体中的胞状枝晶。与SLM成形件相比,接头表现出较粗的枝晶结构、较低的显微硬度、拉伸性能。该接头的力学性能满足实际应用的要求。各向异性对激光焊接接头的组织和力学性能的影响可以忽略不计。平行于打印方向的SLM成形件与锻件焊接得到的接头,可以得到较细的树枝状结构和较高的拉伸性能。
In this paper,laser welding technology was used to connect 316L stainless steel SLMed and forged parts.The process optimization was carried out and the microstructure and properties of the joint were studied.The results showed that the joints appeared good laser weldability without obvious defects.Microstructures of the SLMed parts and laser-welded joints consisted of the cellular dendrite in austenite matrix within the columnar grains.Compared with the SLMed parts,the joints exhibited a coarser dendrite microstructure,lower microhardness,tensile properties.Mechanical properties of the joints met the practical application requirements.The anisotropy of SLMed acted a negligible role in determining the microstructure and mechanical properties in the laser-welded joints.The joint obtained by welding SLMed parts parallel to the building direction to forged parts could obtain finer dendrite microstructure and higher tensile properties.
作者
丁宏德
朱春明
唐斌
顾小燕
Ding Hongde;Zhu Chunming;Tang Bin;Gu Xiaoyan(Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China;National Experimental Teaching Demonstration Center,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China;Chongqing Changan Industry(Group)Limited Liability Company,Chongqing 401120,China)
出处
《焊接》
北大核心
2021年第5期9-14,63,共7页
Welding & Joining
基金
国家自然科学基金资助项目(51705218)。
