高锰奥氏体低温钢发展现状、成分设计及热处理焊接工艺分析  

Composition Design and Heat Treatment Welding Process Analysis of High‑manganese Austenitic Cryogenic Steel

作　　者：徐浩 刘建华[1] 刘洪波 刘颖 李民 何杨[1] Xu Hao;Liu Jianhua;Liu Hongbo;Liu Yin;Li Min;He Yang(National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing,University of Science and Technology Beijing,Beijing 100083,China;Hebei Dahe Material Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]北京科技大学高效轧制与智能制造国家工程研究中心,北京100083 [2]河钢材料院,石家庄050023

出　　处：《特殊钢》2024年第2期8-17,共10页Special Steel

基　　金：河北省中央引导地方科技发展资金项目(No.216Z1009G);河北省自然科学基金资助项目(No.E2021318004)。

摘　　要：以价格低廉的Mn替代价格较为昂贵的Ni,研发新型无Ni低温钢,已成为液化天然气(LNG)储罐用钢当前研究的新热点。本文依次介绍低温钢的概念和特点,以及高锰奥氏体低温钢国内外的发展现状,并详细列举了国家与团体标准中关于高锰奥氏体低温钢成分及性能的要求。综合分析不同元素对高锰奥氏体低温钢力学性能的影响,表明Fe-24Mn-0.45C-3Cr-0.5Cu系高锰奥氏体低温钢综合性能优异,可作为高锰奥氏体低温钢成分体系优化设计参考依据。研究表明,适当热处理可有效提升高锰钢低温韧性,而采用保护金属电弧焊后的焊缝低温韧性要优于埋弧焊,尽管两者屈服强度和抗拉强度无较大差别。A new type of Ni-free cryogenic steel has been developed by replacing the more expensive Ni with low-cost Mn,which has become a new hot spot in the current research of steel for liquefied natural gas(LNG)storage tanks.The concept and characteristics of cryogenic steel are introduced in the beginning and then the research of high manganese austenitic cryogenic steel at home and abroad are introduced in this paper.In addition,the requirements on composition and properties of high manganese austenitic cryogenic steel in national and group standards are listed in detail.By comprehensive analysing the effects of different elements on the mechanical properties of high manganese austenitic cryogenic steel,it is concluded that Fe-24Mn-0.45C-3Cr-0.5Cu series high manganese austenitic cryogenic steel has excellent comprehensive properties,and can be used as a reference for the optimization of composition of high manganese austenitic cryogenic steel design.For the welding process,heat treatment can effectively improve the low temperature toughness of high manganese steel.And the research shows that considering the low temperature toughness,shielded metal are welding has better effect than that of submerged arc welding,although there is no big difference between yield strength and tensile strength。

关 键 词：LNG 高锰奥氏体低温钢 成分设计 热处理 焊接 

分 类 号：TF642[冶金工程—钢铁冶金] TG161[金属学及工艺—热处理]