水电站用低碳贝氏体钢07MnCrMoVR的组织性能研究  

Study on microstructure and properties of low carbon bainite steel 07MnCrMoVR for hydropower station

作　　者：冯路路 胡锋[1] 乔文玮 宋增强 FENG Lu-lu;HU Feng;QIAO Wen-wei;SONG Zeng-qiang(The State Key Laboratory for Refractories and Metallurgy,Collaborative Innovation Center for Advanced Steels,International Research Institute for Steel Technology,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;School of Mechanical Engineering,Jing Chu University of Technology,Jingmen 448000,Hubei,China;Jiangsu Huaneng Cable Co.,Ltd.,Gaoyou 225613,Jiangsu,China;Marketing Center,Beijing Shougang Co.,Ltd.,Beijing 100043,China)

机构地区：[1]武汉科技大学耐火材料与冶金国家重点实验室,高性能钢铁材料及其应用湖北省协同创新中心、国际钢铁研究院,湖北武汉430081 [2]荆楚理工学院机械工程学院,湖北荆门448000 [3]江苏华能电缆股份有限公司,江苏高邮225613 [4]北京首钢股份有限公司营销中心,北京100043

出　　处：《钢铁研究学报》2020年第12期1124-1131,共8页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51671149);湖北省教育厅科学技术研究资助项目(Q20174301);荆楚理工学院科学研究资助项目(PY202004)。

摘　　要：采用不同的宽展比对水电站用低碳贝氏体钢07MnCrMoVR进行了轧制,对回火前后试验钢的微观组织形貌进行了观察,并对力学性能进行了检验,同时利用EDS能谱分析了回火过程中碳化物析出行为。结果表明:采用较小的宽展比能提高粗轧纵轧阶段的单道次压下率以及变形区系数,有效地破碎奥氏体再结晶晶粒,轧制后获得细小的粒状贝氏体组织,高温回火后析出大量的渗碳体和合金碳化物均匀弥散地分布在贝氏体铁素体基体上。随着回火温度的提高,试验钢强度性能呈现先升高再降低的现象,伸长率和低温冲击韧性持续升高。The low-carbon bainite steel 07 MnCrMoVR for hydropower stations was rolled with different wide-spread ratios, the microstructure and mechanical properties of the test steels before and after tempering were observed and tested, respectively. And the carbide precipitation behavior during tempering was analyzed by EDS. The result show that the single pass reduction rate and deformation zone coefficient of roughing rolling stage can be improved by adopt smaller wide-spread ratio, the fine granular bainite microstructure can be obtained after rolling by broken austenite recrystallization grains effectively at longitudinal rolling stage. After tempering at high temperature of test steels, a large number of cementite and alloy carbide are dispersed uniformly on the matrix of bainite ferrite. With the increase of tempering temperature, the strength of the test steels increases first and then decreases, the elongation and low temperature impact toughness continue to increase.

关 键 词：水电站用钢 07MnCrMoVR 低碳贝氏体 宽展比 碳化物 

分 类 号：TG142.1[一般工业技术—材料科学与工程]