Phase and CCT Diagram of an N-Containing 8％Cr Roller Steel
Shu-Hua Sun1,2, Bo Wang1, Zhen-Hua Wang1,3, Yang Gao1, Ming-Wei Guo1,4, Wan-Tang Fu1
(1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China; 2. College of Sciences, Yanshan University, Qinhuangdao 066004, China;3. Key Laboratory of Advanced Forging ＆ Stamping Technology and Science (Yanshan University), Ministry of Education of China, Qinhuangdao 066004, China; 4. China First Heavy Industries, Qiqihar 161042, China)
Abstract:
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 1,5, 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.
Key words: high Cr roller steel phase diagram continuous cooling transformation N alloying
DOI：10.11916/j.issn.1005-9113.2013.06.016
Clc Number:TG142.45
Fund:
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Phase and CCT Diagram of an N-Containing 8％Cr Roller Steel
本站小编 哈尔滨工业大学/2019-10-24
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