Phase and CCT Diagram of an N-Containing 8%Cr Roller Steel  

作　　者：Shu-Hua Sun Bo Wang Zhen-Hua Wang Yang Gao Ming-Wei Guo Wan-Tang Fu 

机构地区：[1]State Key Laboratory of Metastable Materials Science and Technology,Yanshan University [2]College of Sciences,Yanshan University [3]Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University),Ministry of Education of China [4]China First Heavy Industries

出　　处：《Journal of Harbin Institute of Technology(New Series)》2013年第6期112-117,共6页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the Natural Science Foundation of Hebei Province for Distinguished Young Scholars(Grant No.E2011203131);the Natural Science Foundation-Steel and Iron Foundation of Hebei Province(Grant No.E2013203110)

摘　　要：The pseudo-equilibrium phase diagram and continuous cooling transformation diagram of an N-containing 8％ Cr roller steel were investigated by using thermodynamic calculation,differential scanning calorimetry,Ⅹ-ray diffraction,expansion method,and so on.Under equilibrium conditions,the main carbonitrides are MX,M7C3,and M23C6 types.The measured Ac1,Ac3,start temperature of martensitic transformation,and M7C3 transformation temperatures are 811,855,324,and 1100 ℃,respectively.Bainite appears at cooling rates ranging from 0.5 to 5 ℃/s and ferrite forms at grain boundaries at a cooling rate lower than 0.5 ℃/s.Finally,the effects of adding N and lowering the C content on workability and mechanical properties of common 8％Cr steel were discussed.The pseudo-equilibrium phase diagram and continuous cooling transformation diagram of an N-containing 8% Cr roller steel were investigated by using thermodynamic calculation,differential scanning calorimetry, X-ray diffraction, expansion method, and so on. Under equilibrium conditions, the main carbonitrides are MX,M7C3,and M23C6types. The measured Ac1,Ac3,start temperature of martensitic transformation,and M7C3transformation temperatures are 811,855,324,and 1100 ℃,respectively. Bainite appears at cooling rates ranging from 0. 5 to 5 ℃ / s and ferrite forms at grain boundaries at a cooling rate lower than 0. 5 ℃ / s. Finally,the effects of adding N and lowering the C content on workability and mechanical properties of common 8%Cr steel were discussed.

关 键 词：high Cr roller steel phase diagram continuous cooling transformation N alloyingCLC number：TG142.45 Document code：AArticle ID：1005-9113（2013）06-0112-06 

分 类 号：TG142.45[一般工业技术—材料科学与工程]