超声波对BT20钛合金激光熔覆过程的作用  

Ultrasonic effect on Laser Cladding BT20 Titanium Alloy Process

作　　者：王维[1] 郭鹏飞[1] 张建中[2] 杨光[1] 卞宏友[1] 钦兰云[2] 王伟[1] 崔宝磊[1] 蔡淦[1] 王婷[1] 才磊[3] 

机构地区：[1]沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,辽宁沈阳110136 [2]沈阳航空航天大学机电工程学院,辽宁沈阳110136 [3]唐山松下产业机器有限公司,河北唐山063020

出　　处：《中国激光》2013年第8期65-69,共5页Chinese Journal of Lasers

基　　金：辽宁省高校创新团队支持计划(LT2011004);辽宁省自然科学基金(201202173);中航工业产学研创新工程(CXY2011SH16);辽宁省教育厅科学技术研究项目(L2011026)

摘　　要：超声辅助激光熔覆技术是在激光熔覆技术基础上发展起来的,将超声引入激光熔覆中可以提高激光熔覆件质量。通过在BT20钛合金基体上添加频率为19.56kHz的超声振动,进行激光熔覆实验,并据此研究超声对激光熔覆过程的作用。结果表明,2.2 W功率的超声振动使得熔覆层的表面平整性良好,内部组织气孔率下降到0.75%,熔覆层晶粒尺寸减小了约42%,α片层长度减小了23.9%,但沉积生长方向的堆垛效率降低了36.7%。Ultrasonic assisted laser cladding technology is developed on the basis of laser cladding technology, and the technology that ultrasonic is introduced to laser cladding can improve the quality of the cladding layer. The laser cladding experiment is done by adding ultrasound vibration with a frequency of 19.56 kHz on titanium alloy matrix of BT20. Based on the experiment the effects of ultrasound on the laser cladding process is studied. The results show that, under the condition of using 2. 2 W ultrasonic vibration, the surface flatness of the cladding layer is good, the porosity rate of internal organization is dropped to 0.75 %, the grain size is decreased by about 42 %, the α-sheet length is decreased by 23.9 %, but the stacking efficiency in the direction of deposition and growth is reduced by 36.7 %.

关 键 词：激光技术 激光熔覆 超声振动 BT20钛合金 表面平整性 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]