Direct measurement of carbon enrichment in the incomplete bainite transformation in Mo added low carbon steels

被引：66
作者：
Xia, Y. [1 ,2 ]
Miyamoto, G. [2 ]
Yang, Z. G. [1 ]
Zhang, C. [1 ]
Furuhara, T. [2 ]
机构：
[1] Tsinghua Univ, Key Lab Adv Mat, Sch Mat Sci & Engn, Minist Educ, Beijing 100084, Peoples R China
[2] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
来源：
ACTA MATERIALIA | 2015年 / 91卷
基金：
中国国家自然科学基金;
关键词：
Bainite; Steel; Carbon enrichment; EPMA; Incomplete transformation; CONTROLLED PRECIPITATE GROWTH; C-X ALLOYS; SOLUTE DRAG; TERNARY-SYSTEMS; FERRITE; AUSTENITE; KINETICS; BOUNDARIES; STASIS;
D O I：
10.1016/j.actamat.2015.03.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The overall kinetics and carbon enrichment in austenite during the incomplete isothermal bainite transformation in Fe-0.1C-1.5Mn(0, 0.03, 0.3, 0.5, 1)Mo (mass%) alloys were investigated with quantitative metallography and Electron Probe Microanalysis in the transformation temperature range of 773-873 K. The incomplete transformation appears at 823-873 K when Mo addition exceeds 0.3 mass%; at 773 K substantial carbide precipitation accompanies bainite transformation and no transformation stasis is observed. Transformed fractions in the stasis stage are hardly affected by prior austenite grain size. Carbon concentrations in austenite in the stasis stage are lower than To line and decrease with the increase of Mo addition and temperature. To limit, solute drag and WBs limit theories are used to examine the experimentally measured carbon concentration limits in austenite, and their respective flaws are pointed out. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：10 / 18
页数：9
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