| About this Abstract |
| Meeting |
Liquid Metal Processing & Casting Conference (LMPC 2022)
|
| Symposium
|
Liquid Metal Processing & Casting Conference (LMPC 2022)
|
| Presentation Title |
Effect of Solidification Condition on Sulfide Morphology in Free Machining Austenitic Stainless Steel |
| Author(s) |
Keiji Azuma, Yoshinori Sumi |
| On-Site Speaker (Planned) |
Keiji Azuma |
| Abstract Scope |
In the production of free-machining austenitic stainless steels with dispersed sulfide by continuous casting or ingot casting, sulfide morphologies vary depending on the position inside products due to the partial difference of solidification condition. In the final solidification zone at the center of slab or ingot, an increase of concentration of solute in the liquid phase causes coarsening of the sulfides. Coarse sulfides increase susceptibility to cracking during rolling and cause defects during machining, so it is necessary to control the morphology of sulfides. The generation of coarse sulfides is supposed to be caused by macro-scale phenomena during casting, but detailed mechanism has not been clarified. In this study, laboratory scale model samples of Fe-0.075C-0.2Si-1.85Mn-0.3S-8Ni-18.8Cr-0.25Mo(mass%) stainless steel simulating the solidification conditions of the center of slab or large ingot in mass production process were prepared and the effect of solidification conditions on the sulfide morphology was investigated. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |