TY - JOUR
T1 - Effect of Solution Nitriding on Microstructure and Hardness in 12%Cr Martensitic Stainless Steels
AU - Ngo, Huynh Kinh Luan
AU - Nakashima, Koichi
AU - Tsuchiyama, Toshihiro
AU - Takaki, Setsuo
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - Synopsis : Solution nitriding was applied to conventional 12%Cr stainless steels such as JIS SUS410L, SUS410, SUS420J1 and SUS420J2, and then the microstructure and hardness were examined for the as-quenched specimens as well as tempered ones. Nitrogen concentration was increased to around 0. 28 mass% under the solution nitriding condition of 1473K-0. 1MPa N2 in all of the 12%Cr steels regardless of the carbon content. Solid solution strengthening by nitrogen was relatively small compared with that by carbon in as-quenched martensite. However, solutionnitrided steels exhibited a remarkably large secondary hardening during tempering, which hardly appears in conventional martensitic stainless steels without nitrogen. TEM observation and X-ray analysis for extracted residue indicated that the secondary hardening by nitrogen was caused by precipitation of fine CrN nitride.
AB - Synopsis : Solution nitriding was applied to conventional 12%Cr stainless steels such as JIS SUS410L, SUS410, SUS420J1 and SUS420J2, and then the microstructure and hardness were examined for the as-quenched specimens as well as tempered ones. Nitrogen concentration was increased to around 0. 28 mass% under the solution nitriding condition of 1473K-0. 1MPa N2 in all of the 12%Cr steels regardless of the carbon content. Solid solution strengthening by nitrogen was relatively small compared with that by carbon in as-quenched martensite. However, solutionnitrided steels exhibited a remarkably large secondary hardening during tempering, which hardly appears in conventional martensitic stainless steels without nitrogen. TEM observation and X-ray analysis for extracted residue indicated that the secondary hardening by nitrogen was caused by precipitation of fine CrN nitride.
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U2 - 10.2355/tetsutohagane.98.25
DO - 10.2355/tetsutohagane.98.25
M3 - Article
AN - SCOPUS:84855646413
SN - 0021-1575
VL - 98
SP - 25
EP - 31
JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
IS - 1
ER -