Microstructure and Crystallographic Texture of Strip-Cast and Hot-Rolled Austenitic Stainless Steel

摘要

The microstructure and texture of a strip-cast as well as a hot-rolled austenitic stainless steel (18 pet Cr, 8.5 pet Ni) are investigated by the use of optical metallography and quantitative X-ray texture analysis. In the hot band, a homogeneous microstructure is revealed together with a through-thickness texture gradient consisting of a weak cold rolling type of texture in the center layer and a shear texture close to the surface layers. The result is discussed in terms of the through-thickness shear profile that is generated during hot rolling. In the strip-cast material a random orientation distribution as well as the development of martensite close to the center layer is attributed to the impingement and deformation of the films that are solidified on the surfaces of the casting rolls. The texture close to the surface is attributed to the growth selection or {001}(uvw) oriented grains.