我厂生产泰山12型拖拉机齿轮15种,其中有11种带有花键孔,材料是20CrMnTi,渗碳后直接淬火,淬火剂采用20号机油。为了减小齿轮热处理变形,提高齿轮质量。几年来,通过改变芯轴的粗细和装筐方法,在控制齿轮热处理变形方面,收到了良好的效果。齿轮花键孔的变形,一般是趋向于缩小。为稳定变形,通过试验,对每 Our factory produces 15 kinds of Taishan 12 tractor gears, 11 of which have spline holes, the material is 20CrMnTi, directly quenched after carburizing, and the quenching agent uses No. 20 engine oil. In order to reduce heat distortion of gears, improve gear quality. Over the past few years, by changing the thickness of the mandrel and the method of loading baskets, good results have been obtained in controlling the heat treatment and deformation of gears. Deformation of gear spline holes tends to shrink. For stable deformation, pass the test to each