摘要
目前,丝锥主要采用高速钢制作。为了解钢的冶炼工艺和显微组织,如碳化物的尺寸和分布、晶粒度等,对丝锥切削性能的影响,采用喷射冶炼和粉末冶金HSF825K、HOP2030和HSF838高速钢制作了螺旋槽丝锥,检测了丝锥的硬度、显微组织和切削性能。结果表明:3种钢丝锥热处理后的硬度均高于66HRC,钢的碳化物的尺寸、圆整度和分布对丝锥韧性的影响比淬火、回火后的硬度和冶炼工艺的影响大。弥散、细小、圆整、均匀分布的碳化物有利于提高丝锥的韧性和切削性能。采用喷射冶炼的HSF825K钢制作的丝锥的切削性能最佳。
At the present,taps are made largely of high speed steel.To understand the effects of smelting technology and microstructures such as size and distribution of carbides and grain size of steel on cutting ability of tap,the spiral fluted taps were made from jet-melted and PM high speed steels HSF825K,HOP2030 and HSF838,subsequently,were tested for hardness,microstructure and cutting ability.The results demonstrated that after heat treating the taps made from three types of steels all offered hardness above 66 HRC,and that size,roundness and distribution of carbides had a larger effect on toughness of the taps than the hardness of the steel after hardening and tempering and the smelting process of the steel.The dispersed,fine,round and uniformly distributed carbides help to improve toughness and cutting ability of the tap.The tap made of HSF825K steel that was jet melted exhibited optimum cutting ability of the three types of taps.
作者
陆红妹
祝新发
LU Hongmei;ZHU Xinfa(Shanghai Tool Works Co.,Ltd,Shanghai 200093,China)
出处
《热处理》
CAS
2020年第2期17-20,25,共5页
Heat Treatment
基金
“十三五”国家重点研发计划课题(课题编号:2016YFB0300403)。
关键词
高速钢
丝锥
碳化物
切削性能
high speed steel
tap
carbide:cutting ability
