Evolution of microstructures and mechanical properties with tempering temperature of a pearlitic quenched and tempered steel
作者机构：School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China National Key Laboratory of Science and Technology on Materials under Shock and ImpactBeijing 100081China
出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)
年 卷 期：2022年第29卷第9期
页 面：1393-1403页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：support from the National Natural Science Foundation of China(5190102i) the"Beijing Institute of Technology Research Fund Program for Young Scholars"
主 题：Fast austenitization Pearlite Tempering Manganese Mechanical property
摘 要：Instead of conventional quenching and tempering,fast austenitization from an initial microstructure of lamellar pearlite followed by quenching and tempering was carried out,leading to the formation of inhomogeneous *** comprised different morphologies of lath martensite and retained austenite(RA).The effect of tempering temperature on microstructure evolution and tensile properties was systematically *** increasing tempering temperature from 150 to 250℃,transition carbides gradually coarsened and their amount increased,the dislocation density in martensitic laths gradually decreased,and RA fraction decreased from 10.9%to 2.2%.The precipitation and dislocation strengthening can ensure a high strength,while RA can ensure a good ductility,leading to a simultaneous increase in the strength and ductility when decreasing tempering ***,the best combination of tensile properties(ultimate tensile strength of 2133±41 MPa and total elongation of 11.1%±1.3%)was achieved after tempering at 150℃.
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