超细晶粒Q235钢的制备研究  

Study on Preparation of Ultrafine Grained Q235 Steel

作　　者：李茂林[1] 张文广[1] 杨承刚[1] 金刚[1] 

机构地区：[1]环境保护部核与辐射安全中心,北京100082

出　　处：《热加工工艺》2013年第24期117-120,共4页Hot Working Technology

摘　　要：在传统Q235钢的基础上,通过添加微量合金元素Ti和Nb并且配以不同的控轧控冷工艺,得到了强度与韧性配合良好的超细晶粒Q235钢。利用Zeiss软件测定不同工艺下Q235钢的晶粒尺寸,研究经不同工艺处理后的晶粒尺寸大小和分布情况。在对其显微组织观察和力学性能测试的基础上,分析了超细晶粒Q235钢组织结构与性能之间的关系。结果表明,超细晶粒Q235钢的屈服强度较传统Q235钢翻了近一番。强度改善的主要原因可归结为微量合金化元素Ti和Nb的添加与控轧控冷工艺综合作用的结果。Based on traditional Q235 steel,ultrafine grained Q235 steel with high strength and toughness was obtained by adding microalloying Nb and Ti and employing appropriate controlled rolling and accelerated cooling process.The grain size under different technologies was determined by Zeiss software,while the grain size and distribution with different technology treatment was investigated.Based on observing the microstructure and measuring their mechanical properties,the relationship between structure and properties was analyzed.The results show that,the strength of ultrafine grained Q235 steel is about twofold of traditional Q235 steel,which results from the addition of microalloying elements Nb and Ti and using appropriate controlled rolling and accelerated cooling process.

关 键 词：超细晶粒 Q235 钢 力学性能 合金元素 控轧控冷 强韧化机制 

分 类 号：TG142.1[一般工业技术—材料科学与工程]