马世宁,巴德玛

• 1:装甲兵工程学院装备再制造工程系

摘要(Abstract)：

利用表面机械加工法在具有回火索氏体组织的38CrSi合金钢表面制备了纳米结构层,利用X射线衍射和透射电镜等分析技术,对距表面不同深度处渗碳体相的微观结构特征及物相组成进行研究,分析38CrSi合金钢表面纳米化过程中渗碳体相的细化过程。结果表明,铁素体基体细化过程中,渗碳体颗粒在切变力作用下形成细小颗粒的同时还发生了溶解。在应变量和应变速度较高的最表面,渗碳体颗粒溶解较严重,分析表明高密度位错产生的高界面能、应力集中以及能量波动是使得渗碳体颗粒发生切变和溶解主要原因。

关键词(KeyWords)： 38CrSi合金钢;表面纳米化;渗碳体相;细化机理

Abstract:

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基金项目(Foundation): 装备维修科研资助项目(2004.1541)

作者(Author): 马世宁,巴德玛

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