激光熔覆工艺参数对涂层质量的影响及其优化选择  

Effect of Laser Cladding Parameters on Quality of Coating and Optimization Selection of Parameters

作　　者：赵树国[1] 李成龙[1] 程成[1] 

机构地区：[1]沈阳航空航天大学工程训练中心,辽宁沈阳110136

出　　处：《热加工工艺》2015年第22期82-85,共4页Hot Working Technology

基　　金：辽宁省自然科学基金资助项目(201202172)

摘　　要：以TC11表面制备80%CBN微粉+20%Ti粉(均为质量分数)涂层为例,考虑了此类激光熔覆在预处理与加工过程中特殊的工艺方法。利用正交试验分析各工艺参数对熔池尺寸的影响。试验表明,随激光功率的增加,熔宽先增大后减小、熔深增大、熔高减小;熔池的各个尺寸均随扫描速度与预置层厚度的增大而减小。通过综合考虑涂层的宏观质量、涂层的预期性能与熔池尺寸来优化工艺参数,得到在激光功率1800 W、扫描速度5 mm/s以及预置层厚度0.6mm时涂层形貌较好,硬度明显增加。Using laser c ladding 80% CBN＋20%Ti powder coating on TC11 titanium alloy as an example, the special method in the process of preprocessing and processing was considered in this kind of laser cladding. Effects of parameters on size of melted pool were studied by orthogonal experiment. The results show that the width of melted pool increases firstly then decrease with the rising of laser power, while the depth increases and the height decreases. The size of melted pool decreases with the increase of scanning velocity and coating thickness. Analyzing feature and performance of coating and size of melted pool, it is concluded that coating＇s appearance is good and hardness increases significantly when laser power is 1800 W, scanning velocity is 5 mm/s and coating thickness is 0.6 mm.

关 键 词：激光熔覆 工艺参数 涂层质量 正交试验 优化选择 

分 类 号：TG156.99[金属学及工艺—热处理]