材料期刊网

采用X射线衍射技术和光学显微分析等方法，研究了同步和异步冷轧方式对SUS430铁素体不锈钢微观组织、织构演变以及力学和成形性能的影响。结果表明，与同步冷轧相比，由于异步轧制剪切变形的引入，可使异步冷轧板材的平均晶粒尺寸减小。在同步冷轧过程中，其二次冷轧再结晶织构为完整的γ纤维织构，导致铁素体不锈钢的最终性能优于同步一次冷轧；而在异步冷轧过程中，异步一次冷轧再结晶织构为强点{111}<1ˉ1ˉ2>的γ纤维织构，异步二次冷轧再结晶织构属于随机取向织构，其结果是异步一次冷轧板材的性能优于异步二次冷轧。综合分析表明，与异步二次冷轧方式相比，同步二次冷轧方式有利于铁素体不锈钢性能的提高。

The effects of cold rolling schedules,synchronous and asynchronous cold rolling,on the microstructure, texture evolution,and mechanical property and formability of SUS430 ferritic stainless steel sheet were investigated by using X-ray diffraction(XRD)and optical microscopy. The results showed that in asynchronous cold rolling,the aver-age grain size of the sheet is finer than that of synchronous cold rolling due to the introduction of shear deformation. In synchronous cold rolling,a completeγ-fiber recrystallization texture could be obtained by annealing after two-step syn-chronous cold rolling,resulting in superior property as compared with that after one-step synchronous cold rolling. In asynchronous cold rolling,γ-fiber recrystallization texture with strong orientation of{111}<1ˉ1ˉ2>could be obtained by annealing after one-step asynchronous cold rolling,while recrystallization texture with nearly random orientation is achieved by annealing after two-step asynchronous cold rolling. As a result,the property of the ferritic stainless steel af-ter one-step asynchronous cold rolling is better than that with two-step asynchronous cold rolling. A comprehensive anal-ysis further indicates that the two-step synchronous cold rolling is much more beneficial to the mechanical behavior and formability of SUS430 ferritic stainless steel compared with that with two-step asynchronous cold rolling.