2024-03-29T06:33:05Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00012357
2022-12-14T04:06:58Z
1221:1222
TRIP型焼鈍マルテンサイト鋼の残留オーステナイト特性と引張特性に及ぼすCrとMoの影響
Effects of Cr and Mo on Retained Austenite Characteristics and Tensile Properties of TRIP-aided Annealed Martensitic Steel
小林, 純也
吉川, 伸麻
村上, 俊夫
杉本, 公一
Copyright© 2012 The Iron and Steel Institute of Japan
high-strength steel
TRIP-aided steel
micro-alloying
microstructure
retained austenite
annealed martensite
tensile property
The effects of Cr and Mo on microstructure, retained austenite characteristics and tensile properties of a 0.2%C, 1.5%Si, 1.5%Mn, 0.05%Nb TRIP-aided steel with annealed martensite matrix, "TRIP-aided annealed martensitic steel; TAM steel", were investigated to enhance the hardenability. Volume fraction and carbon concentration of retained austenite were decreased with increasing hardenability, although the volume fraction was increased in a 0.5% Cr bearing steel. Simultaneously, blocky second phase consisting of carbon-enriched martensite and retained austenite increased with increasing hardenability. These interesting characteristics were mainly caused by preferential nucleation of austenite on prior austenitic grain and packet boundaries on intercritical annealing and delayed bainitic transformation during austempering. Tensile strength of the steels was increased with increasing hardenability, accompanied with the decreased yield stress. Combination of tensile strength and total elongation decreased with increasing hardenability due to the increased blocky second phase.
Article
鉄と鋼. 98(11):610-617 (2012)
IRON STEEL INST JAPAN KEIDANREN KAIKAN
2012-11
jpn
journal article
VoR
http://hdl.handle.net/10091/17200
https://soar-ir.repo.nii.ac.jp/records/12357
https://doi.org/10.2355/tetsutohagane.98.610
10.2355/tetsutohagane.98.610
0021-1575
AN00151251
鉄と鋼
98
11
610
617
https://soar-ir.repo.nii.ac.jp/record/12357/files/98_610_Effects_Cr_Mo_Retained_Austenite_Characteristics.pdf
application/pdf
6.7 MB
2015-09-28