摘要
硬态切削中表面变质层对工件的物理力学性能和服役性能有重要影响。针对表面变质层厚度与晶粒细化程度问题,进行了H13钢硬态铣削正交试验,分析了变质层厚度与加工表面层微观组织演变的关系;建立了表面变质层厚度S关于切削速度v、径向切削深度ae、每齿进给量fz的预测模型。结果表明:变质层厚度越大,加工表面晶粒细化程度越高;白层的产生会弱化晶粒细化程度;回归模型可以较为准确地预测加工表面变质层厚度。
The surface deformation layer during hard cutting plays an important role in the surface integrity and serviceability of the workpiece.The orthogonal experiments of H13 steel hard milling is carried out in view of the thickness and the grain refinement degree of the surface deformation layer.The relationship between the deformation layer thickness and the microstructure evolution of the machined surface is analyzed.The prediction model of the surface deformation layer thickness S is established with respect to cutting speed v,cutting depth a e and feed rate f z.The results show that with the increasing of the deformation layer thickness,the grain refinement degree becomes higher in the machined surface;the generation of white layer will weaken the grain refinement degree;the model can accurately predict the thickness of the surface deformation layer.
作者
胡瑞泽
张松
Hu Ruize;Zhang Song(Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE,School of Mechanical Engineering,Shandong University,Key National Demonstration Center for Experimental Mechanical Engineering Education,Shandong University,Jinan 250061,China)
出处
《工具技术》
2019年第6期14-18,共5页
Tool Engineering
基金
国家自然科学基金(51575321,51175309)
关键词
H13钢
硬态铣削
微观组织
表面变质层
H13 Steel
hard milling
microstructure
surface deformation layer
