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材料工程  2015 

Ti和Ti-V微合金化低碳贝氏体钢组织性能及析出行为的研究

DOI: 10.11868/j.issn.1001-4381.2015.06.009, PP. 52-59

Keywords: 粒状贝氏体,纳米级析出相,位错线,(Ti,Mo)C,(Ti,V,Mo)C

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Abstract:

利用场发射扫描电子显微镜(FE-SEM)、高分辨透射电子显微镜(HRTEM)和能谱仪(EDS)等,研究了不同Ti含量的低碳贝氏体钢的显微组织和析出相的成分、尺寸、形貌以及分布等特征。结果表明在450℃和520℃保温2h,三种实验钢组织为粒状贝氏体。与低Ti实验钢相比,高Ti及Ti-V复合实验钢的屈服强度增加了150MPa以上。高Ti钢中纳米级析出相有两种类型一种大于15nm的TiC析出相;另一种是在10nm以下,具有面心立方结构的(Ti,Mo)C复合析出相。Ti-V钢基体中存在大量尺寸在10nm以下的(Ti,V,Mo)C复合析出相。

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