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针对2205双相不锈钢冷轧过程中磁性发生显著变化的问题,通过室温冷轧(70%压下率)的方法对冷轧前后材料的磁性用光学显微镜(OM)、铁素体测量仪、X-射线衍射和EBSD做了研究。结果表明:由于双相不锈钢常温下冷轧过程中α相不发生分解,且材料中Cr超过20%,γ相在冷轧过程中不容易发生马氏体转变,硬度测量也没有显示发生马氏体转变。铁素体仪测量冷轧后试样和原始铸态相比示数下降15%,主要来源于轧制过程中铁素体磁性的变化。冷轧过程中晶粒发生细化、铁素体在冷变形过程中位错发生缠结生成大量的亚晶界、变形导致的内应力场以及织构的影响,使铁素体的磁性发生显著的下降。
In view of the significant change of magnetism during the cold rolling of 2205 duplex stainless steel, the magnetic properties of the material before and after cold rolling were analyzed by OM (optical microscope), ferrite gauge, X - Ray diffraction and EBSD were studied. The results show that the martensitic transformation of the γ phase is not easy to occur during the cold rolling because the α phase does not decompose during the cold rolling at room temperature and the content of Cr exceeds 20% Body change. Ferrite measurement Cold-rolled specimens and the original cast compared to the number of shows dropped 15%, mainly from the rolling process of ferrite magnetic changes. In the cold rolling process, the grain refinement occurs, and the dislocations of ferrite in the cold deformation process generate a large number of subgrain boundaries, the internal stress field caused by the deformation and the influence of texture, so that the ferrite magnetism occurs significantly Decline.