SCM15钢轿车变速器行星齿轮断裂分析
The Split Analysis of SCM15 Steel Planet Gear of Sedan Gearbox
张红兵
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作者单位：沈阳职业技术学院
中文关键字：行星齿轮；过载；渗碳层；脆性断裂
英文关键字：Planet Gear；Overload；Cementite layer；Brittleness splits
中文摘要：本文针对SCM15钢轿车变速器行星齿轮断裂处材料组织与性能，分析加工与使用过程中产生断裂的原因。结果表明，行星齿轮承受瞬间过载，导致韧性较低的最薄弱的渗碳层部位萌生大于临界尺寸的裂纹，发生沿晶脆性断裂。
英文摘要：：This text aims at the SCM15 steel sedan gearbox planet gear material organization and function at fracture, analysis processes to produce the reason for splitting with use in the process. Express that the planet wheel gear once bore a moment to carry as a result, it causes tenacity's oozing a lower carbon layer and most weakly, part's rising is bigger than the crack of critical size, take place follow the crystal brittleness splits.