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本文介绍了25MnTiBRE和18CrMnTi钢在0.6、1.0、1.3mm三种层深的条件下,渗碳、碳氮共渗和薄层软化工艺及其对接触疲劳强度的影响。试验表明:同一种材料以薄层软化工艺的接触疲劳强度最高,碳氮共渗次之,渗碳最差,而且各工艺随其渗层厚度增加,接触疲劳强度提高。在工艺和渗层厚度相同时,25MnTiBRE比18CrMnTi钢的接触疲劳强度高。
In this paper, the effects of carburizing, carbonitriding, thin layer softening and their effects on the contact fatigue strength of 25MnTiBRE and 18CrMnTi steels under the conditions of 0.6, 1.0 and 1.3 mm depth are introduced. Experiments show that: the same material to the thin layer softening process the highest contact fatigue strength, followed by carbonitriding, carburizing the worst, and each process with its layer thickness increases, contact fatigue strength increased. The contact fatigue strength of 25MnTiBRE is higher than that of 18CrMnTi steel at the same process and layer thickness.