提高厚斗齿铸件使用寿命的研究
Research on Improving Life of Heavy Section Tooth Casting
陈映川， 陆卫倩
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作者单位：（上海电机学院 机械工程学院， 上海 200240）
中文关键字：厚斗齿； 应力集中； 涂料处理； 齿尖快冷； 整体缓冷
英文关键字：heavy teeth concentration; stress; coating treatment; tooth tip fast-cooling; slow cooling
中文摘要：某铸造厂将挖掘机上斗齿的齿尖改为厚齿后发生断裂等早期失效。分析了厚斗齿可能失效的各种原因。 经研究发现，齿尖、齿腔厚薄尺寸相差较大引起的应力是断裂失效的主要原因， 并针对性的采取了一系列措施， 从根本上解决了早期失效的问题， 大大提高了厚斗齿铸件的使用寿命。
英文摘要：The early failure happened after changing teeth thickness of heavy hection hooth casting in a casting plant. The reasons for failure were analyzed. The main reason was the stress induced by difference of wall thickness. The early failure was resolved by adopting a series of measures. The life of the castings is greatly enhanced in actual production.