摘要
在实验室条件下研究了调质工艺参数(淬火温度870~960℃,回火温度580~670℃)对EH47船板钢显微组织的影响。结果表明:试验钢经调质处理后的显微组织是以针状铁素体为主,含一定量粒状铁素体、准多边形铁素体和粒状贝氏体的混合组织。回火温度相同,随着淬火温度的升高,试验钢的组织更为细小均匀,贝氏体含量稍有增加;淬火温度相同,随着回火温度的升高,组织更为细小,针状铁素体含量增加,贝氏体含量减少。930℃保温30 min淬火、640℃回火30 min的钢的组织最为细小均匀。因此,EH47船板钢的实际调质淬火温度应高于900℃,回火温度控制在580~640℃。
Effect of quanching-and-tempering process parameters,that is,austenitizing temperatures of 870 to 960℃and tempering temperatures of 580 to 670℃,on microstructure of EH47 hull steel was investigated in laboratory.The results showed that microstructure of the steel after quenching and tempering was predominantly acicular ferrite,also contained a certain amount of granular ferrite,quasi-polygonal ferrite and granular bainite.With the increase in austenitizing temperature,the steel exhibited even finer and even more uniform microstructure,and slightly decreased bainite content after tempering at the same temperature.With the increase in tempering temperature,the steel quenched from the same temperature exhibited even finer microstructure which contained more acicular ferrite and less bainite.The steel held at 930℃for 30 min and quenched,then tempered at 640℃for 30 min given the finest and most uniform microstructure.In view of the foregoing,actual austenitizing temperature should be above 900℃,and tempering temperature should be controlled in the range of 580 to 640℃for the EH47 hull steel.
作者
李洪楠
张红梅
赵大东
王渐灵
刘焕然
李娜
姜正义
LI Hongnan;ZHANG Hongmei;ZHAO Dadong;WANG Jianling;LIU Huanran;LI Na;JIANG Zhengyi(School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan Liaoning 114051, China;Anshan Steel Group Chaoyang Steel Company Limited, Chaoyang Liaoning 122000, China;State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan Liaoning 114009, China)
出处
《上海金属》
CAS
2021年第1期72-76,82,共6页
Shanghai Metals
基金
辽宁省自然科学基金(20180550952)
辽宁科技大学与海工钢国家重点实验室联合项目(SKLMEA-USTL 2017010和201905)。
