摘要：在相同的铣削参数下，对硬度为31HRC和41HRC的3Cr2Mo淬硬钢进行高速铣削试验，结果表明：工件硬度不同，铣削参数对表面粗糙度的影响截然相反。高硬度下，进给量的影响占主导地位；低硬度下，切削速度对表面粗糙度的影响占主导地位。根据高速切削机理，分析了铣削参数在不同工件硬度下对表面粗糙度的影响规律。

关键词：高速铣削；表面粗糙度；工件硬度；铣削温度

中图分类号：TG506.1；TH161.1文献标志码：ADOI：10.3969/j.issn.1000-7008.2021.08.009

Effect of Hardness on Surface Roughness During HighSpeed Milling of 3Cr2Mo Steel

Pang Junzhong，Niu Musen

Abstract:Under the same milling parameters，a highspeed milling test is carried out on 3Cr2Mo hardened steel with hardness of 31HRC and 41HRC.The results show that：with different hardness，the effect of milling parameters on surface roughness is quite different.At high hardness，the effect of feed rate dominates；at low hardness，the effect of cutting speed dominates.According to the mechanism of highspeed cutting，the effect of milling parameters on the surface roughness under different workpiece hardness is analyzed.

Keywords:highspeed milling；surface roughness；workpiece hardness；milling temperature