Effect of the Laser Power on the Geometrical Features of 316L Stainless Steel Additively Manufactured by Direct Laser Metal Deposition (DLMD)
参考中译:激光功率对直接激光金属沉积（DLMD）增材制造316L不锈钢几何特征的影响


          

刊名：Lasers in Engineering
作者：O. Mehrabi（Department of Mechanical Engineering, University of Birjand）
S. M. H. Seyedkashi（Department of Mechanical Engineering, University of Birjand）
M. Moradi（Faculty of Arts, Science and Technology, University of Northampton）
刊号：537B0017
ISSN：0898-1507
出版年：2023
年卷期：2023, vol.56, no.1/3
页码：127-141
总页数：15
分类号：TN24
关键词：Fibre laser；316L stainless steel；4130 steel；Powder；Additive manufacturing (AM)；Direct laser metal deposition (DLMD)；Laser power；Geometrical features；Microstructure；Microhardness
参考中译：光纤激光器; 316L不锈钢; 4130钢;粉末;增材制造（AM）;直接激光金属沉积（DLMD）;激光功率;几何特征;微观结构;显微硬度
语种：eng
文摘：Additive manufacturing (AM) is one of the most important and, of course, the most attractive technologies that has attracted the attention of industries and researchers in the last few decades. The direct laser metal deposition (DLMD) method is one of the AM methods that can be used to produce metal parts with good dimensional accuracy and quality. In this research the effect of laser power on the geometrical dimensions and microhardness of 316L stainless teel single-track layers additively manufactured by the DLMD method onto a 4130 steel substrate was studied. In addition, the microstructure of the 316L stainless steel DLMD layers was investigated. The height and the maximum width of the 316L stainless steel DLMD layer, the width of the interface, penetration depth, and microhardness characteristics of the 316L stainless DLMD single-track layers were considered as output responses. The results showed that by increasing the laser power, the height, maximum width of the 316L stainless steel DLMD layer, width of the interface, and penetration depth of the 316L stainless DLMD single-track layers increased. At the maximum laser power of 260 W the maximum height and maximum width of the 316L stainless steel DLMD layer and width of the interface of the 316L stainless steel DLMD layers were obtained at 830,970 and 615 μm, respectively. The microhardness of the samples varied from 281 to 314 HV. Examination of the microstructure of the 316L stainless steel DLMD layers showed solidification in columnar and equiaxed dendritic structures in all parts of the single-track layers, with the formation of secondary phases in the interdcndritic regions.
参考中译：在过去的几十年里，加法制造(AM)是最重要也是最有吸引力的技术之一，引起了工业界和研究人员的关注。直接激光金属沉积(DLMD)方法是制造具有良好尺寸精度和质量的金属零件的AM方法之一。研究了激光功率对用DLMD方法在4130钢表面添加316L不锈钢单道涂层的几何尺寸和显微硬度的影响。此外，还对316L不锈钢DLMD层的组织结构进行了研究。考虑了316L不锈钢DLMD层的高度和最大宽度、界面宽度、熔透深度以及316L不锈钢DLMD单道层的显微硬度特性作为输出响应。结果表明，随着激光功率的增大，316L不锈钢DLMD单轨层的厚度、最大宽度、界面宽度和穿透深度都有所增加。在最大激光功率为260W时，在830、970和615μm处分别获得了316L不锈钢的最大厚度和最大宽度以及316L不锈钢的最大界面宽度。样品的显微硬度在281~314HV之间变化。对316L不锈钢DLMD层的显微组织分析表明，单道层各部位均以柱状和等轴状枝晶组织凝固，并在晶间区域形成第二相。



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