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我厂生产的C6127 B普通车床的铸铁导轨,经过试验已由电接触加热自冷淬火,改为中频感应加热水冷淬火,全部淬火面一次淬好。使导轨表面硬化区由网络状变成全部平面,并获得高的硬度(达HRC40～50),淬硬层深度2～3mm,在长为1250mm的导轨平面上,最大变形量可控制在0.40mm范围内,现将该工艺的特点介绍如下:一、铸件的质量要求C6127B车床床身简图如图1,导轨全长1520mm,需淬火长度H40mm,材料为HT20-40,铸件的化学成分和金相组织必须
I plant the production of C6127 B ordinary lathe cast iron rail, after the test has been heated by electric contact self-quenching, replaced by induction heating water quenching, quenching all hardened surface. So that the hardened surface area of the guideway is transformed into an entire plane by the network shape, and high hardness (up to HRC40-50) is obtained. The hardened layer depth is 2 to 3mm. On the guide rail plane of 1250mm in length, the maximum deformation can be controlled at 0.40mm Range, the characteristics of the process are as follows: First, the quality requirements of casting C6127B lathe bed diagram shown in Figure 1, the guide rail length of 1520mm, the required quenching length H40mm, the material is HT20-40, the chemical composition of the casting and gold Organization must be