张杰,蔡庆伍,樊艳秋,武会宾

• 1:北京科技大学高效轧制国家工程研究中心

摘要(Abstract)：

在Gleeble-3500型热模拟试验机上,对E690海洋用钢进行直接淬火及快速加热条件下不同温度的回火处理,并采用光学显微镜等设备研究了不同的回火温度对其组织、析出物及显微硬度的影响。结果表明:实验钢直接淬火态组织以板条贝氏体为主,经回火后,组织为板条贝氏体、粒状贝氏体、多边形铁素体的混合组织,不同的回火温度下各自所占比例不同;回火后的析出物主要是10 nm以内的ε-Cu颗粒和20 nm以内的Nb、Ti、Cu的复合析出颗粒,它们均匀、弥散、细小地分布于基体上;550、580和620℃回火时的晶界取向差以≤15°的小角度晶界较多,使材料具有优良的韧塑性;不同回火温度对试样的显微硬度值影响较大,其随回火温度的升高呈现先升高后下降再略微升高的趋势。

关键词(KeyWords)： 回火温度;显微硬度;组织;析出物;EBSD

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项资金资助项目(FRF-BR-10-035B)

作者(Author): 张杰,蔡庆伍,樊艳秋,武会宾

DOI: 10.13289/j.issn.1009-6264.2012.04.014

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