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高载荷渗碳零件的工作能力颇大程度上取决于钢材质量和化学热处理工艺。由于渗碳零件多半在周期负荷下工作,采用疲劳试验较为合适。但是,疲劳试验漫长又繁重,目前比较通用的试验方法是静弯曲试验,它能说明渗碳层的强度和整个渗碳断面塑性变形和脆断情况。它的试验结果与疲劳极限有关。同时,钢材质量的变化,静弯曲试验非常敏感。为了查明渗碳零件在制造过程中的缺陷的形成原因和提高使用寿命,苏联研究了工艺因素对各种渗碳钢静弯曲断裂强度的影响。
The ability to work with high-load carburized parts depends very much on the quality of the steel and the chemical heat treatment process. Since carburizing parts work mostly under cyclic loading, fatigue testing is more appropriate. However, the fatigue test is long and heavy. At present, the more common test method is the static bending test, which shows the strength of carburized layer and the plastic deformation and brittle fracture of the entire carburized section. Its test results are related to the fatigue limit. At the same time, changes in the quality of steel, static bending test is very sensitive. In order to find out the reasons for the formation of carburized parts defects in the manufacturing process and improve the service life, the Soviet Union studied the effect of technological factors on the static bending rupture strength of various carburized steels.