我厂在东风—12型渗碳齿轮生产中,内花键孔的变形是一个较难解决的问题(花键孔底径(?)28-48毫米,公差仅0.05毫米)。渗碳缓冷后予以高频淬火虽可控制内孔变形,但不能获得最佳综合机械性能。倘渗碳缓冷后予以盐浴加热塞芯棒淬火,但劳动强度太大,且轮齿表面往往易产生脱碳现象。我们经过不断摸索和探讨,在齿轮渗碳后直接进行热油淬火,并 I plant in the production of Dongfeng -12 type carburizing gear, the deformation of the internal spline hole is a difficult problem to solve (spline hole diameter (?) 28-48 mm, tolerance of only 0.05 mm). After carburizing slow cooling to high frequency quenching can control the bore deformation, but can not get the best overall mechanical properties. If the slow cooling after carburizing salt bath heating plug mandrel quenching, but the labor intensity is too large, and tend to tend to produce decarburization on the surface of gear teeth. After continuous exploration and exploration, we quench the hot oil directly after gear carburizing