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重载卡车曲轴开裂失效分析

Hongzhi ZHANG,Guoqiang LIU,Hongyan XIANG,Xihui TIAN,Zhikun YANG

Hot Working Technology（2015）

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Abstract
通过化学成分、宏观断口、显微组织分析和硬度检测对重载卡车曲轴断裂件进行失效分析.结果表明:失效曲轴的失效模式为低周高应力疲劳断裂,不合理的热处理工艺导致基体强度不足是造成曲轴失效的主要原因.严格控制热加工工艺参数,实现曲轴基体强化和轴颈处的感应有效层深是保证实现其服役性能的关键.
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