摘要
刀具磨损是影响材料加工表面质量的重要因素。利用后刀面磨损量V_(B)分别为0、80、213、286、392μm的K44硬质合金球头铣刀对Ti60钛合金进行铣削实验,测试在不同刀具磨损状态下加工表面的粗糙度、表面形貌和纹理、残余应力、显微硬度和微观组织,分析了Ti60铣削表面完整性与刀具后刀面磨损量V_(B)之间的关系。结果表明:随着后刀面磨损量V_(B)的增加,表面粗糙度由0.683μm变化为1.554μm,表面形貌和表面纹理也随着刀具磨损量变化呈现出不同的特征,表面残余应力与显微硬度增加,残余应力层深度和硬化层深度分别达到35μm和40μm,表层微观组织中丛域状α沿着铣削加工进给方向发生了一定程度的扭曲变形,塑性变形层厚度由3μm增加至8μm。
Tool wear is an important factor affecting the processing surface quality of material.The milling experiments of Ti60 titanium alloy were carried out by using K44 carbide ball-end milling cutter with flank wear V_(B)of 0,80,213,286μm and 392μm,respectively.The surface roughness,surface morphology and texture,residual stress,microhardness and microstructure of the machined surface under different tool wear conditions were tested.The relationship between the surface integrity of Ti60 milling and the tool flank wear V_(B)was analyzed.The results show that with the increase of tool wear V_(B),the surface roughness changes from 0.683μm to 1.554μm,and the surface morphology and surface texture also show different characteristics with the change of tool wear.The surface residual stress and microhardness increase.The depth of the residual stress layer and the hardening layer can reach 35μm and 40μm,respectively.The cluster-likeαin the surface microstructure has a certain degree of distortion along the milling feed direction.The thickness of the plastic deformation layer increases from 3μm to 8μm.
作者
姚倡锋
罗健鑫
谭靓
崔敏超
张钰霏
陈俊霖
唐文昊
赵季康
Yao Changfeng;Luo Jianxin;Tan Liang;Cui Minchao;Zhang Yufei;Cheng Junlin;Tang Wenhao;Zhao Jikang(Key Laboratory of High Performance Manufacturing for Aero Engine,Ministry of Industry and Information Technology,Northwestern Polytechnical University,Xi'an Shaanxi 710072,China;State Key Laboratory of Cemented Carbide,Zhuzhou Hunan 412000,China)
出处
《硬质合金》
CAS
2022年第5期364-371,共8页
Cemented Carbides
基金
国家科技重大专项(No.2017-Ⅶ-0001-0094)
国家自然科学基金(No.91860206、No.51875472、No.92160301)
中国博士后科学基金(No.2022M712199)。
