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Effect of Mn content on microstructure, tensile and impact properties of SA508Gr.4N steel for reactor pressure vessel

《钢铁研究学报:英文版》2020年 第4期 | Xi-kou He Zhi-qiang Yang Zhen Wang Shi-bin Qiao Zheng-dong Liu   Institute for Special Steels Central Iron and Steel Research Institute Beijing 100081 China Technology Center of Ma’anshan Iron and Steel Co. Ltd. Ma’anshan 243000 Anhui China
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摘 要:The effect of manganese(Mn)on the microstructure,tensile and impact properties of SA508Gr.4N steel has been experimentally investigated.The influence of Mn content on the substructure of SA508Gr.4N steel was investigated using the scanning electron microscope,electron back-scattered diffractometer and transmission electron microscope.It was found that the increased Mn content had a beneficial effect on both strength and toughness.Examination of microstructure revealed smaller size of block and larger number of high-angle grain boundaries with higher Mn content.The change of the ultimate tensile strength and toughness with increasing Mn content was attributed to the increased hardenability,the number of high-angle grain boundaries and the crack propagation path by the block refining.
【分 类】【工业技术】 > 金属学与金属工艺 > 金属学与热处理
【关键词】 Mn element SA508Gr.4N steel MICROSTRUCTURE Charpy impact toughness SUBSTRUCTURE
【出 处】 《钢铁研究学报:英文版》2020年 第4期 461-470页 共10页
【收 录】 中文科技期刊数据库