Effect of Cold Deformation Prior to Induction Heating Austenitization on Dissolution Speed of Carbide in SUJ2 Steel / 誘導加熱によるSUJ2鋼のオーステナイト化における炭化物の溶解の速さに対する冷間加工の影響
- Resource Type
- Journal Article
- Authors
- Hiroshi Yuki; Shota Takada; 結城 敬史; 髙田 翔太
- Source
- 鉄と鋼 / Tetsu-to-Hagane. 2018, 104(11):664
- Subject
- SUJ2
bearing steel
carbide dissolution
cold deformation
heat treatment
induction heating
- Language
- Japanese
- ISSN
- 0021-1575
1883-2954
The volume fraction of carbide present at grain boundaries was estimated assuming a simple geometrical model. The relationship between the holding time and the volume fraction of undissolved carbide was derived based on a bulk diffusion model of chromium into an austenite matrix. Experimental results on the dissolution speed of carbide were qualitatively explained by considering the combination of grain boundary diffusion and bulk diffusion. The austenitization behavior of SUJ2 steel is remarkably influenced by the microstructure, in particular for short austenitization times.