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What is Sigma Phase in 309L Stainless Steel about?
This study investigates the formation of the sigma phase in 309L stainless cast billets during homogenization treatment. It finds that the cooling rate after homogenization significantly influences sigma formation, with rapid air cooling between 600 and 850 °C being essential to prevent its occurrence. The presence of the sigma phase is detrimental to the mechanical properties and processing of the cast 309L, particularly in wire drawing applications.
- Author
- 鄭勝元
- Language
- EN