冷轧工艺对铁素体不锈钢成形性能的影响

为了研究冷轧工艺对新型铁素体不锈钢19Cr2Mo1W成形性能的影响，采用XRD，EBSD技术以及平均塑性应变比与粗糙度测量等手段，研究了不同压下率冷轧及随后退火过程中的织构演变和微观组织变化，并讨论了织构和微观组织对成形性能的影响.结果表明:随着冷轧压下率的增加，铁素体不锈钢中的α和γ纤维织构均有所增强，且α和γ纤维织构最终稳定取向分别为223〈110〉和111〈011〉.冷轧板α纤维织构中223〈110〉组分越强，退火后γ再结晶织构强度越高.冷轧板在1050℃退火时，薄板的γ再结晶织构强度高，再结晶组织均匀且尺寸较小，表面粗糙度最小，综合成形性能最佳.

Influence of Cold Rolling Process on Formability of a Ferritic Stainless Steel

In order to study the effect of cold rolling process on the formability of 19Cr2Mo1W ferritic stainless steel， the micro structure and texture evolution of this steel during cold-rolling and annealing processes were investigated by X-ray diffraction(XRD)， electron back-scatter diffraction(EBSD)，roughness and plastic strain ratio analytical methods. The results indicated that the amount of α and γ fiber textures in cold-rolled sheet increased with the increase of cold rolling reduction， and the stable orientation of α and γ fiber textures during cold rolling was223〈110〉and 111〈011〉component， respectively. In addition， the strength of the γ recrystallization texture became higher， when the amount of223〈110〉component increased. After annealing at 1050℃ for 1 min， the recrystallized ferritic grains in the sheet distributed uniformly with a fine grain size， the surface roughness was small and the strength of the γ fiber texture was relatively high， i.e.，the formability of the cold-rolled steel sheet was the best.