Tensile behavior and fracture characteristic of plates of hot-rolled ferritic stainless steel 0. 04C- 16Cr and 0. 02C-12Cr at room temperature were studied. The results showed that two types of stainless steel are of high strength, but low plasticity, strength and hardness of steel 0. 02C-12Cr with less C and Cr were higher than those of steel 0. 04C-16Cr. This was because of a mass of martensite formed in 0. 02C- 12Cr steel when it was air-cooled. Their fracture at room temperature was toughness fracture, where the fracture micro-shape took the form of mainly small dimple-gathering, the particles of fine carbonize distributed within striped structure along rolling-direction were the dimple origin centre, layered fracture and side crack were discovered somewhere in the fracture. By analyzing fracture surface, fracture process and structure characteristic, it was found that foregoing mechanical behavior and fracture characteristic were resulted from the striped structure along the rolling-direction.
Journal of Lanzhou University of Technology
ferritic stainless steel
tension test at room temperature