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.
出处
《热加工工艺》
CSCD
北大核心
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)
