Homogenous strength-toughness match for 20Mn2SiCrMoV bainitic large-size parts via processing of VC particles and quenching control

作     者：Yu Tian Zhun-Li Tan Jin-Zhou Zhang Zheng-Yuan Yuan Min Zhang Bing-Zhe Bai Yu Tian;Zhun-Li Tan;Jin-Zhou Zhang;Zheng-Yuan Yuan;Min Zhang;Bing-Zhe Bai

作者机构：Material Science&Engineering Research CenterSchool of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing100044China Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第10期

页      面：3485-3496页

核心收录：

学科分类：080503[工学-材料加工工程] 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）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the Fundamental Research Funds for the Central Universities (No. 2019JBZ103) 

主　　题：Large-size parts Property homogeneity Cooling control Bainite VC 

摘      要：The problem of insufficient hardenability in general large-size parts always occurs in product manufacturing because of their large size,*** is restricted mainly by its own alloy composition with micro-alloy and key quenching and partitioning(Q&P) *** relationship between the cooling rate and properties of small samples was analyzed as the basis of the initial cooling rate at different positions corresponding to large-size parts combined with controlled austenization temperature in this *** as-treated micro structure after a fast cooling rate is mainly composed of lath bainite,martensite,and retained austenite(RA),while bainite and RA after a slow cooling *** showed that cooling control via decreasing spray intensity,meeting higher strength at the surface,and good strength and toughness match can be obtained both at the surface and in the ***-treated large ring part has~1330 MPa tensile strength and~95 J impact energy at the surface,and meantime,~1191 MPa tensile strength and~70 J impact energy in the center,which narrows the property difference.