摘要
对Fe-Mn-Cr-C系热轧高锰奥氏体低温钢进行变形量分别为0、12.5%和50%的拉伸变形及再结晶热处理,通过EBSD、XRD、拉伸试验和硬度测试的方法研究了冷变形及再结晶热处理对试验钢硬度的影响。结果表明,冷变形后试验钢组织仍为单相奥氏体,未形成新相。随冷变形量的增加,试验钢中孪晶数量增加,变形量为12.5%时,少部分晶粒产生变形孪晶,变形量为50%时,变形孪晶密集且相互交叉。当变形量由0增加至50%时,硬度从262 HV上升到400 HV,而经再结晶热处理后,硬度下降明显,分别降低到179 HV和166 HV。
Effects of cold deformation and recrystallization heat treatment on hardness of hot-rolled Fe-Mn-Cr-C series high manganese austenitic cryogenic steel with deformation of 0,12.5%and 50%were studied by means of EBSD,XRD,tensile test and hardness test.The results show that microstructure of the steel is still single austenite and no new phase is observed after cold deformation.With the increase of cold deformation,the quantity of twins in the steel increases.When the deformation is 12.5%,the deformation twins are formed in a small number of grains.When the deformation is 50%,the deformation twins are dense and intersecting with each other.The hardness of the steel increases from 262 HV to 400 HV with the increase of deformation from 0 to 50%,and decreases to 179 HV and 166 HV respectively after recrystallization heat treatment.
作者
张富伟
朱海
李晓晨
王杨文
高佩华
王红鸿
Zhang Fuwei;Zhu Hai;Li Xiaochen;Wang Yangwen;Gao Peihua;Wang Honghong(China Merchants Jinling Shipyard(Yangzhou)Dingheng Co.,Ltd.,Yangzhou Jiangsu 225217,China;The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan Hubei 430081,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第1期223-227,共5页
Heat Treatment of Metals
基金
2021湖北省重点研发计划(2021BID003)
招商局金陵鼎衡船舶(扬州)有限公司高锰奥氏体低温钢LNG样罐建造技术项目(2022H20486)。
关键词
高锰奥氏体低温钢
拉伸变形
硬度
再结晶
high-manganese austenitic cryogenic steel
tensile strain
hardness
recrystallization
