激光重熔高速电弧喷涂FeNiCrAl涂层的工艺优化  

Process optimization of laser remelting for FeNiCrAI coating prepared by high-velocity arc spraying

作　　者：胡岚[1] 盛忠起[1] 王玉江[2] 刘文超[2] 魏世丞[2] HU Lan SHENG Zhong-qi WANG Yu-jiang LIU Wen-chao WEI Shi-cheng(School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《电镀与涂饰》2016年第22期1209-1213,共5页Electroplating & Finishing

摘　　要：以外观形貌、孔隙率和显微硬度为评价指标,利用正交试验并结合极差分析法考察了激光功率、扫描速率和搭接步距这3个激光重熔工艺参数对高速电弧喷涂FeNiCrAl涂层重熔层的影响,得到优化工艺参数为:激光功率1 700 W,扫描速率10mm/s,搭接步距2.1 mm。结果表明,影响激光重熔最主要的参数是激光功率,随着激光功率的增大,重熔层的孔隙率先增大后减小,显微硬度显著增加。优化后所制重熔层的孔隙率为0.9%,显微硬度567.03 HV_(0.1),比喷涂层的显微硬度提高38.5%。重熔后,喷涂层的层状堆叠结构消失,产生了树枝晶和枝晶间组织。The effects of laser power, scanning velocity and overlap distance on laser remelting of FeNiCrA1 coating prepared by high-velocity arc spraying were analyzed based on the result of orthogonal test and range analysis with the appearance, porosity and microhardness as evaluation indexes. The optimal process parameters were determined as follows： laser power 1 700 W, scanning velocity 10 mm/s and overlap distance 2.1 mm. The results showed that the main parameter affecting laser remelting process is laser power. With the increasing of laser power, the porosity of remelted coating is increased initially and then decreased, and its microhardness increased significantly. The remelted coating prepared by optimized parameters has a porosity of 0.9%, and a microhardness of 567.03 HV0.1, which is 38.5% higher than that of the as-sprayed coating. After remelting, layer stacking structure from sprayed coating is disappeared and the dendrite and interdendritic structures are formed.

关 键 词：碳钢 铁镍铬铝合金 高速电弧喷涂 激光重熔 正交试验 工艺优化 

分 类 号：TN249[电子电信—物理电子学]