张继明,喻春明

• 1:西京学院机械工程学院
• 2:江苏省沙钢钢铁研究院

摘要(Abstract)：

研究了含Nb低合金高强钢在不同时效工艺下的力学性能和显微组织,并采用扫描电镜(SEM)和透射电镜(TEM)及原位分析方法研究了时效过程中试验钢的位错组态和含Nb碳化物的析出规律。结果表明,与原始态相比,随着时效温度的增加,试验钢的强度增加,塑性和韧性降低。显微组织TEM观察和原位分析结果表明,在200～300℃时效温度范围内,随着时效温度的增加,试验钢中的位错密度大幅降低,时效诱发了含Nb碳化物的大量析出,时效后试验钢的强度增加是NbC析出强化的结果。

关键词(KeyWords)： 含Nb低合金高强钢;时效;力学性能;位错;析出相

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 张继明,喻春明

DOI: 10.13289/j.issn.1009-6264.2019-0030

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