Experimental and thermodynamic studies of phase transformations in Cr-V low alloy steels

被引：12
|
作者：
Homolová, V
Janovec, J
Kroupa, A
机构：
[1] Slovak Acad Sci, Inst Mat Res, Kosice 04353, Slovakia
[2] Acad Sci Czech Republ, Inst Phys Mat, Brno 61662, Czech Republic
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 335卷 / 1-2期
关键词：
phase equilibria; THERMO-CALC; Cr-V low alloy steels; transmission electron microscopy;
D O I：
10.1016/S0921-5093(01)01932-3
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Phase transformations in three Cr-V low alloy steels at 773 and 853 K were studied experimentally in a transmission electron microscope (TEM). The theoretical calculations were carried out for ternary Fe-Cr-C and quaternary Fe-Cr-V-C systems corresponding to the investigated steels. The calculations of phase equilibria were performed using the thermodynamic database program THERMO-CALC. M3C in 1Cr and 1Cr-0.3V steels, M7C3 in 1Cr-0.3V steel, and MC in 1Cr-0.3V and lCr-0.5V steels were identified. The formation M3C precedes the formation Of M7C3. The M7C3 carbide in all investigated steels and the MC carbide in steels containing vanadium were determined by THERMO-CALc as equilibrium phases. The comparison of experimental and computational results indicates that the investigated steels have not achieved equilibrium even after aging for 5000 h at 773 and 853 K. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：290 / 297
页数：8
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