2024-03-29T05:26:58Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00012327
2022-12-14T04:05:59Z
1221:1222
TRIP型マルテンサイト鋼板の伸びフランジ性に及ぼす合金元素添加の影響
Effects of Microalloying on Stretch-flangeability of TRIP-aided Martensitic Sheet Steel
Pham, Van Duc
Kobayashi, Junya
Sugimoto, Koh-ichi
Copyright© 2013 The Iron and Steel Institute of Japan
stretch-flangeability
microalloying
ultrahigh-strength steel
TRIP-aided steel
retained austenite
martensite
The effects of Cr, Mo and Ni additions on the microstructure and stretch-flangeability of 0.2%C-1.5%Si-1.5%Mn-0.05%Nb, in mass%, TRIPaided martensitic sheet steel produced by isothermal transformation process at a temperature below martensite-finish temperatures were investigated to develop the 3rd-generation sheet steel for automobile requiring high hardenability. When 0.5% or 1.0% Cr was added to the base steel, the combination of tensile strength of 1.5 GPa and hole-expanding ratio of 40% was attained. On the other hand, the Cr-Mo or Cr-MoNi addition hardly influenced the stretch-flangeability and stretch-formability, although it increased the yield and tensile strengths, comparing to the base steel. The good balance of Cr-bearing steel was mainly caused by suitable combination of (1) volume fraction and (2) interparticle path of finely dispersed martensite-austenite complex phase (M-A phase), which suppressed a void initiation at the matrix/M-A phase interface on hole-punching and void coalescence or crack extension on hole-expanding.
Article
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN. 99(11):659-668 (2013)
IRON STEEL INST JAPAN KEIDANREN KAIKAN
2013
jpn
journal article
VoR
http://hdl.handle.net/10091/17703
https://soar-ir.repo.nii.ac.jp/records/12327
https://doi.org/10.2355/tetsutohagane.99.659
10.2355/tetsutohagane.99.659
0021-1575
AN00151251
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN
99
11
659
668
https://soar-ir.repo.nii.ac.jp/record/12327/files/Effects_Microalloying_Stretch-flangeability_TRIP-aided_Martensitic.pdf
application/pdf
8.5 MB
2015-09-28