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1955年我厂锭子车间主要生产任务是制造锭桿,如图1。在质量要求上硬度的软硬点非常复杂。当时是将锭桿ABC三段全部淬硬到R_c60～65。结果,在B部校直时因硬度高,以致校断率也很高。我厂沈海权同志在‘机械制造’杂志上,学到了锭桿分段囘火的方法,他改装了分段囘火爐进行了试验,使锭桿B段的硬度降低了。后来他又从兄弟厂关于使用火焰表面淬火的先进经验中得到了启
1955 I workshop main production workshop spindle is the manufacture of spindle, shown in Figure 1. Hard and soft points on the quality requirements of the hardness is very complicated. At that time, all three sections of the sparger ABC were hardened to R_c60 ~ 65. As a result, when the part B is straightened, the hardness is high, so that the check-out rate is also high. Comrade Shen Haiquan in our factory learned the method of section tempering in the section of “Machinery Manufacturing”. He modified the section tempering furnace to carry out the experiment, which reduced the hardness of section B of the spar. He later learned from his brother’s advanced experience in the use of flame surface hardening