强流脉冲电子束辐照YW2硬质合金刀具的响应面法优化  

Optimization the process parameters of YW2 cemented carbide tool modified by high current pulsed electron beam with response surface method

作　　者：娄长胜[1] 张尧[1] 吕逍[1] 王强[2] 

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159 [2]东北大学材料电磁过程研究教育部重点实验室,沈阳110819

出　　处：《功能材料》2015年第10期10138-10143,共6页Journal of Functional Materials

基　　金：国家科技重大专项资助项目(2012ZX04003-061)

摘　　要：采用强流脉冲电子束对YW2硬质合金刀具进行辐照表面改性。根据Box-Behnken中心组合方法设计3因素3水平实验方案,以刀具表面的显微硬度和粗糙度为响应值,对加速电压、工作电流和脉冲次数等辐照工艺参数进行优化。实验结果表明,经综合分析优化后的脉冲电子束辐照最优参数:加速电压10 k V,工作电流180 A,脉冲次数45次。与未经处理刀具相比,该工艺下辐照后的YW2硬质合金刀具的显微硬度明显提高,而粗糙度值降低;对TC4钛合金的切削实验结果也验证了优化工艺处理后刀具的切削性能明显得到提高。The YW2 cemented carbide tools were surface modified by high current pulsed electron beam irradiation. An experiment program with three factors and three levels was designed by using central composite method of Box-Behnken.The effects of accelerate voltage,current,pulse number on the microhardness and roughness of YW2 carbide tools were optimized with response surface methodology. The results show that the optimal parameters are following: accelerate voltage of 10 k V,current of 180 A and pulse number of 45 times. Compared with the untreated tool,the irradiated YW2 tool under optimal condition has higher microharness and lower roughness. The cutting performance of the irradiated YW2 tool under optimal condition has improved through the cutting tests of titanium alloy.

关 键 词：响应面法 表面改性 YW2硬质合金刀具 显微硬度 粗糙度 切削性能 

分 类 号：TG17[金属学及工艺—金属表面处理] TG135[金属学及工艺—金属学]