pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (22권5호 231-237)
Osprey Forming of HSLA-100 Steels
HSLA-100강의 Osprey 성형
Su-Jung Park, Kil-Hong Lee, Hyun-Kyu Lee
The structure and properties of HSLA steel obtained by Osprey forming process were investigated. The porosities were generated at the bottom of specimen due to the quenching effect of cold substrate during forming. The steel had a bainitic structure. The grain size were different among positions due to the cooling rates. The elements such as Mn, S, Si, Cr, Mo and etc. were contained in inclusions. They were formed at grain boundries. The size of them was 1~2μm and has nothing to do with the chemical composition. MnS and NbC were precipitated during rolling and aging.
HSLA steels, Osprey forming, Bainitic structure