李新城,陈轶,朱伟兴,罗玉亭,唐永春,王晓莉

• 1:江苏大学机械工程学院
• 2:江苏大学电气信息工程学院

摘要(Abstract)：

针对利用形变强化铁素体相变工艺制备出的超细晶铁素体钢,其抗拉强度很高但伸长率偏低的问题,对其进行了组织精细分析。精细分析结果表明,针状铁素体的形成主要与轧后冷速有关,冷速越大,针状铁素体越多,针状铁素体对钢的力学性能具有双重影响,一方面钢的抗拉强度随着针状铁素体体积比的增加而增加;另一方面又因针状铁素体其内部的精细结构特征、形态特征、针尖效应及其尺寸等影响因素,使钢的伸长率大为降低。当将试验钢中针状铁素体体积比控制在7.28%左右时,可使钢的抗拉强度在高达740 MPa时,仍具有26%的理想伸长率。

关键词(KeyWords)： 针状铁素体;超细晶铁素体钢;力学性能;精细结构;形态特征

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51179076);; 江苏高校优势学科建设工程资助项目

作者(Author): 李新城,陈轶,朱伟兴,罗玉亭,唐永春,王晓莉

DOI: 10.13289/j.issn.1009-6264.2015.05.025

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