Abstract
A High carbon martensitic stainless steel (Fe-12%Cr-0.7%C) was subjected to isothermal aging after full solution treatment, and then solution-treated again in the two phase region of austenite and M 23C 6 carbide; partial solution (PS) treatment. Microstructural development during these heat treatment was investigated, and mechanical properties for the PS treated steel were evaluated by comparison with a referencial steel without isothermal aging. During the isothermal aging at 923K, the supercooled austenite undergoes eutectoid transformation and decomposes to ferrite and M 23C 6 carbide, and the carbide particles are finely dispersed within the matrix. Insoluble carbide particles retained during the following PS treatment contribute to suppressing austenite grain growth effectively through the grain boundary pinning effect. Ductile-brittle transition in the PS treated steel is characterized by a lower transition temperature and a higher upper-shelf energy compared with the referencial steel. This is due to the grain refining of prior austenite as well as the homogeneous dispersion of carbide particles through the PS treatment with isothermal aging.
| Original language | English |
|---|---|
| Journal | ISIJ International |
| Volume | 40 |
| Issue number | SUPPL. |
| Publication status | Published - 2000 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Metals and Alloys
Cite this
Microstructure control for toughening a high carbon martensitic stainless steel. / Tsuchiyma, Toshihiro; Ono, Yoshinori; Takaki, Setsuo.
In: ISIJ International, Vol. 40, No. SUPPL., 2000.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Microstructure control for toughening a high carbon martensitic stainless steel
AU - Tsuchiyma, Toshihiro
AU - Ono, Yoshinori
AU - Takaki, Setsuo
PY - 2000
Y1 - 2000
N2 - A High carbon martensitic stainless steel (Fe-12%Cr-0.7%C) was subjected to isothermal aging after full solution treatment, and then solution-treated again in the two phase region of austenite and M 23C 6 carbide; partial solution (PS) treatment. Microstructural development during these heat treatment was investigated, and mechanical properties for the PS treated steel were evaluated by comparison with a referencial steel without isothermal aging. During the isothermal aging at 923K, the supercooled austenite undergoes eutectoid transformation and decomposes to ferrite and M 23C 6 carbide, and the carbide particles are finely dispersed within the matrix. Insoluble carbide particles retained during the following PS treatment contribute to suppressing austenite grain growth effectively through the grain boundary pinning effect. Ductile-brittle transition in the PS treated steel is characterized by a lower transition temperature and a higher upper-shelf energy compared with the referencial steel. This is due to the grain refining of prior austenite as well as the homogeneous dispersion of carbide particles through the PS treatment with isothermal aging.
AB - A High carbon martensitic stainless steel (Fe-12%Cr-0.7%C) was subjected to isothermal aging after full solution treatment, and then solution-treated again in the two phase region of austenite and M 23C 6 carbide; partial solution (PS) treatment. Microstructural development during these heat treatment was investigated, and mechanical properties for the PS treated steel were evaluated by comparison with a referencial steel without isothermal aging. During the isothermal aging at 923K, the supercooled austenite undergoes eutectoid transformation and decomposes to ferrite and M 23C 6 carbide, and the carbide particles are finely dispersed within the matrix. Insoluble carbide particles retained during the following PS treatment contribute to suppressing austenite grain growth effectively through the grain boundary pinning effect. Ductile-brittle transition in the PS treated steel is characterized by a lower transition temperature and a higher upper-shelf energy compared with the referencial steel. This is due to the grain refining of prior austenite as well as the homogeneous dispersion of carbide particles through the PS treatment with isothermal aging.
UR - http://www.scopus.com/inward/record.url?scp=24044555995&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=24044555995&partnerID=8YFLogxK
M3 - Article
VL - 40
JO - ISIJ International
JF - ISIJ International
SN - 0915-1559
IS - SUPPL.
ER -