概述热轧齿轮是新近大力发展的一种工艺;国内各工厂也在广泛应用。目前所用的轮坯都是钢制,因此成本较高。在齿轮制造中,有些工厂大胆地应用了球墨铸铁;为了提高其表面强度,采用了表面淬火及等温淬火;但是对于要求高的高速齿轮还没有尝试。球墨铸铁中石墨呈球状。据国内外文献介绍,它具有很好的压延性,可以进行热轧;在这方面我们继科学院之后,正在进行试验,但就初步结果看来,其轧制温 Overview Hot-rolled gear is a newly developed technology; the domestic factories are also widely used. The currently used round blanks are made of steel, so the cost is higher. In gear manufacturing, some factories have daringly applied ductile cast iron; surface hardening and isothermal quenching have been used to increase their surface strength; however, no attempt has been made to require high-speed gears. Graphite in ductile iron is spherical. According to domestic and foreign literature, it has good rolling resistance, can be hot-rolled; in this regard, following the Academy of Sciences, is being tested, but the preliminary results appear that its rolling temperature