为提高犁铧的耐磨性,我厂于1964年开始对65Mn钢犁铧进行等温淬火试验。几年来,先后解决了在等温淬火中的几道难关,终于使我厂生产的各种断面的65Mn、65SiMnR犁铧的金相组织、硬度均达到了等温淬火的要求,通过十八套犁铧三万一千多亩的田间试验,初步得出如下结论: (1)65Mn犁铧于马氏体开始转变温度以下(200℃左右)等温淬火后和普通淬火-回火者相比,前者的耐磨性(在同样硬度下)能提 To improve the ploughshare of the wear resistance, I plant in 1964 started 65Mn steel plowshare isothermal quenching test. Over the past few years, has solved a few difficulties in isothermal quenching, and finally make the various sections of our plant 65Mn, 65SiMnR ploughshare metallurgical organization, hardness reached the requirements of isothermal quenching, through the eighteen plowshare thirty thousand 1000 acres of field trials, the initial conclusions as follows: (1) 65Mn ploughshare in the martensite at the beginning of the transformation temperature below (about 200 ℃) after isothermal quenching and conventional quenching - tempering compared to the former wear resistance (At the same hardness) can mention