45钢表面激光熔覆Stellite6-8%WC涂层工艺参数优化  

Optimization of Process Parameters of Laser Cladding Stellite6-8%WC Coating on 45 Steel

作　　者：张琢 Zhang Zhuo(Hbis Group Tangsteel Company,Tangshan,China)

机构地区：[1]河钢集团唐钢公司,河北唐山

出　　处：《科学技术创新》2024年第5期57-60,共4页Scientific and Technological Innovation

摘　　要：为了确定在45钢表面熔覆Stellite6-8%WC粉末的最佳工艺参数,利用正交试验法选取激光功率、扫描速度和送粉速率三个工艺参数,进行三因素三水平正交试验。以熔覆层硬度和稀释率作为评价指标,进行极差分析,对激光熔覆Stellite6-8%WC工艺参数进行优化。结果表明:对熔覆层硬度的影响次序依次为激光功率>送粉速率>扫描速度,对稀释率的影响次序为激光功率>扫描速度>送粉速率。优化出的最佳工艺参数组合为激光功率1600 W,扫描速度5 mm/s,送粉速率20 g/min,并利用最佳工艺参数组合制备出熔覆层,得到平均显微硬度为397HV0.2,约为45钢基体的1.6倍。To determine the best process parameters for coating Stellite6-8%WC powder on the surface of 45 steel,laser power,scanning speed,and powder feeding rate were selected by the orthogonal test method,and three factors and three levels of the orthogonal test were carried out.Using the hardness and dilution rate of the cladding layer as evaluation indexes,range analysis was carried out to optimize the process parameters of laser cladding Stellite6-8%WC.The results show that the laser power had the greatest impact on the hardness of the cladding layer,followed by powder feeding rate and scanning speed.Similarly,the dilution rate of the cladding layer was most influenced by laser power,scanning speed,and powder feeding rate.The optimal process parameters were laser power 1600 W,scanning speed 5 mm/s,powder feed rate 20 g/min,and the cladding layer was prepared by using the optimal process parameters,and the average microhardness was 397HV0.2,about 1.6 times that of 45 steel substrate.

关 键 词：激光熔覆 Stellite6-8%WC 工艺参数 正交试验 显微硬度 

分 类 号：TG174.44[金属学及工艺—金属表面处理]