摘要
针对AISI 4340高强钢加工质量较差的问题,采用硬质合金涂层刀具进行高速干铣削试验,研究切削参数对加工表面硬化和残余应力的影响。结果表明:铣削速度对加工表面硬化程度和硬化层深度影响最大,且随着铣削速度的增加,加工表面硬度值减小,硬化层深度逐渐减小;加工表面在进给、切削以及45°方向均产生残余压应力,铣削速度和每齿进给量对残余应力的影响较大;在v_c=400~500 m/min,f_z=0.03~0.06 mm/齿,a_p=0.2~0.3 mm,a_e=3~4 mm的切削条件加工时,可以获得较小的加工表面硬化程度和较大的表面残余压应力。该结果对高强度钢类零部件的生产具有理论指导意义。
According to the poor machined quality during high-speed milling of AISI 4340 high-strength steel,cemented carbide coated tool was used to make experiments on high-speed dry milling. Effect of cutting parameters on working hardening and residual stress is studied. The results show that the milling speed has the greatest influence on the hardening degree and the depth of hardening layer. The hardness of the machined surface and the depth of hardening layer decreases gradually with the increase of milling speed. The machined surface compressive residual stresses are produced in the feed direction,the cutting direction and the 45 ° direction. Milling speed and feed rate per tooth have greater influence on residual stress. The smaller degree of surface hardening and higher surface residual compressive stress can be obtained at vc= 400 ～ 500 m/min,fz= 0. 03 ～ 0. 06 mm/tooth,ap= 0. 2 ～ 0. 3 mm,ae= 3 ～ 4 mm. The research of this paper has theoretical significance on manufacturing of surface processing quality of high-strength steel parts.
作者
于英钊
高军
郑光明
楚满福
张旭
李源
YU Yingzhao;GAO Jun;ZHENG Guangming;CHU Manfu;ZHANG Xu;LI Yuan(School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, CH)
出处
《制造技术与机床》
北大核心
2018年第6期142-146,共5页
Manufacturing Technology & Machine Tool
基金
国家自然科学基金(51505264)
淄博市校城融合发展计划(2017ZBXC032)
关键词
高速铣削
涂层刀具
加工表面硬化
残余应力
high-speed milling
coated tool
working surface hardening
residual stress
