Ti6Al4V表面激光熔覆NiCrBSi+B_4C涂层的工艺研究  

Study on Laser Cladding NiCrBSi+B_4C Compound Coating on Ti6Al4V Alloy

作　　者：于宽[1] 范小红[1] 

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101

出　　处：《热加工工艺》2009年第12期109-112,115,共5页Hot Working Technology

基　　金：山东省自然科学基资助项目(Y2007F42)

摘　　要：采用JG-Ⅱ型CO2工业激光器,选用不同配比(均采用质量配比)的NiCrBSi和B4C粉末在TC4合金表面进行激光熔覆处理,通过原位自生法制备出TiC与TiB2等增强相增强钛基复合材料涂层;研究了激光熔覆工艺参数对熔覆层质量及稀释率的影响。结果表明:激光熔覆层的宏、微观质量与熔覆材料种类和激光熔覆工艺参数密切相关;在优化的激光工艺参数:P=750W,d=3mm,δ=0.8mm(NiCrBSi+2%B4C混粉),δ=0.6mm(纯NiCrBSi粉),v=5mm/s时,获得了激光熔覆层表面连续均匀、内部无裂纹和气孔且与基底实现冶金结合的NiCrBSi和NiCrBSi+2%B4C激光熔覆层。The laser cladding treatment of Ti6A14V alloy was carried out using CO2 laser machine, with various mixture ratio of NiCrBSi and B4C, the （TiC＋TiB2） reinforced titanium matrix composite was obtained through in-situ synthesis. The influences of processing parameters on laser cladding qualities and dilution rate were studied. The results show that under the laser cladding parameters of P=750 W, d=3 mm, δ=0.8 mm （NiCrBSi＋2%B4C）, 8=0.6 mm （NiCrBSi）, v =5 ram/s, NiCrBSi and NiCrBSi＋2%B4C clad layers are obtained, in which no pores and cracks appear and hard particles are uniformly distributed, and the clad layers are metallurgical bonded with TC4 alloy substrate.

关 键 词：激光熔覆 NICRBSI合金 复合涂层 工艺参数 

分 类 号：TG174.44[金属学及工艺—金属表面处理]