超声振动激光切削钨合金表面质量评价试验  

Ultrasonic vibration laser cutting tungsten alloy surface quality evaluation test

作　　者：叶新娜[1] 李山山 袁洪川 YE Xinna;LI Shanshan;YUAN Hongchuan(School of Automobile,Henan Transportation Polytechnic,Zhengzhou 450006,CHN;School of Mechanical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,CHN;Henan Falcon Fire Science and Technology Co.,Ltd.,Zhengzhou 455100,CHN)

机构地区：[1]河南交通职业技术学院汽车学院,河南郑州450006 [2]河北科技大学机械工程学院,河北石家庄050018 [3]河南省猎鹰消防科技有限公司,河南郑州455100

出　　处：《制造技术与机床》2023年第6期162-166,共5页Manufacturing Technology & Machine Tool

基　　金：河南省高等学校青年骨干培养计划基金项目(2016GGJS-249)。

摘　　要：对90W-7Ni-3Fe硬质合金进行了超声振动激光切削测试,并分析了表面完整性的影响因素,通过实验对工件的显微组织形貌、表面结构、残余应力、粗糙度、表面硬度与晶体位错密度开展了研究。研究结果表明:采用超声振动激光切削方式获得了比常规切削模式更小的粗糙度,对犁沟与鳞刺起到显著抑制作用,获得了更小的工件表面粗糙度,显著改善了加工质量。以相同工件进行切削时得到的钨相与粘结相位于亚表面区域的变质层,钨相变质层达到400 nm的厚度,粘结相变质层达到1μm的厚度。采用超声振动激光切削得到的工件表面位错密度相对常规切削。与基体硬度相比,以UEVC与CC方式切削加工表面硬度显著提高,超声切削试样表面更明显硬化。采用超声振动方式形成了更高残余应力。Ultrasonic vibration cutting tests were carried out on 90W-7Ni-3Fe alloy and the influencing factors of surface integrity were analyzed.The microstructure morphology,surface structure,residual stress,roughness,surface hardness and crystal dislocation density of the workpiece were studied by experiments.The results show that the ultrasonic vibration cutting method has a smaller roughness than the conventional cutting mode,which has a significant restraining effect on furrows and scales,and has a smaller roughness of workpiece surface,and significantly improves the machining quality.When the same workpiece is cut,the tungsten phase and the bonded phase are located in the metamorphosed layer in the sub-surface region.The thickness of the tungsten phase metamorphosed layer is up to 400 nm,and the thickness of the bonded phase metamorphosed layer is up to 1μm.The dislocation density of workpiece surface obtained by ultrasonic vibration cutting is relative to conventional cutting.Compared with the matrix hardness,the surface hardness of the samples cut by UEVC and CC is significantly increased,and the surface hardening of the samples cut by ultrasonic is more obvious.The higher residual stress is formed by ultrasonic vibration.

关 键 词：超声振动激光切削 表面粗糙度 微观组织 显微硬度 残余应力 

分 类 号：TG663[金属学及工艺—金属切削加工及机床]