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在江苏省工业厅、南京市工业局的领导下,南京第一机械厂于去年年底就展开了“以土铁代钢”的试验,在试验过程中,得到了南京航空学院的大力协作与指导。经过了几个月的苦战,终于在今年 2月分用高P、高S土铁制成一台C613型土球铁机床。把车床之主要锻钢件——主轴、花键轴、各种齿轮等全部用土球铁代替,该车床经过三天破坏性试验,切削性能良好,丝毫没有异常现象(试验规范是:吃刀量10~12公厘,走刀量0．6—0.8公量。正常产品为:吃刀量6—8公厘,走刀量0.6公厘,转速=450转/分)。特别是有些零件还有砂眼、黑皮等缺陷,也经受得起这种超负荷切削。
Under the leadership of Jiangsu Provincial Department of Industry and Nanjing Municipal Bureau of Industry, Nanjing No.1 Machinery Factory started the trial of “substituting soil and iron for steel” at the end of last year. During the experiment, it got the great cooperation and guidance from Nanjing Aeronautical Institute . After a few months of hard work, finally in February this year, points with high-P, high-S soil made of a C613 soil ball machine. The lathe’s main forgings - spindles, spline shaft, all kinds of gear and so on all replaced by soil ductile iron, the lathe after three days of destructive testing, cutting performance is good, with no abnormalities (test norms are: eat knife 10 ~ 12 mm, the amount of knife 0.6-0.8 公斤. Normal products: eat knife 6-8 mm, take the amount of 0.6 mm, speed = 450 r / min). In particular, some parts also have trachoma, black skin and other defects, have also been able to withstand this overload cutting.