闫牧夫,刘瑞良,吴业琼,杨茂

• 1:哈尔滨工业大学材料科学与工程学院金属精密热加工国家级重点实验室

摘要(Abstract)：

采用固溶处理、热轧、冷拔变形和电加热的复合技术实现了3J33马氏体时效钢纳米化,平均晶粒尺寸约为70nm。对纳米化的马氏体时效钢分别在390℃和360℃进行8h脉冲等离子体渗氮,利用XRD、显微硬度计和纳米硬度计对渗氮层生成相和性能进行了测试,并且基于第一性原理对渗氮相的性能进行了表征。结果表明,两个温度下渗层中生成的氮化相分别为γ′-Fe4N和FeN0.076,二者均具有较高的硬度和良好的塑性。计算结果表明,γ′-Fe4N和FeN0.076相中N与Fe原子的成键作用较强,且两相都具有延性。

关键词(KeyWords)： 3J33钢;纳米化;低温离子体渗氮;FeN0.076;第一性原理表征

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50871035);; 教育部博士点基金(20060213017)

作者(Author): 闫牧夫,刘瑞良,吴业琼,杨茂

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