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对45钢经盐浴硫氮碳共渗处理的大批试样，进行了滚子接触疲劳性能试验，绘出了P－S－N曲线，分析了接触疲劳断口形貌及破坏机理。
A large number of specimens treated by salt-bath sulphonitriding of 45 steel were tested for roller contact fatigue performance and the P-S-N curve was plotted. The contact fatigue fracture morphology and failure mechanism were analyzed.