冷轧奥氏体不锈钢加热时的转变

Transformation of Cold Rolled Austenitic Stainless Steel During Annealing

用Ｘ射线衍射、光学显微镜和取向分布函数计算分析了９５％冷轧奥氏体不锈钢板γ相在９００℃加热时的转变和α相体积分数的变化。结果表明，γ相再结晶被定向形核过程所控制，并因此在特定的冷轧亚稳｛１１２｝＜１１１＞、｛１００｝＜００１＞和｛１１０｝＜００１＞取向上生成织构。α相体积分数的变化与γ相的稳定性密切相关。另外还探讨了调整工艺参数，控制织构生成以消除板材制耳效应的可能性。

The orientation transformation of γ phase as well as the volume fraction change of α phase in 95% cold rolled austenitic stainless steel during annealing at 900℃ were analyzed by means of X ray diffraction,optical microscopy and ODFs.It was shown that the recrystallization in γ phase was governed by the oriented nucleation process,and therefore certain specific textures were formed around {112}<111>,{100}<001> and {110}<001>,which were the metastable orientations during rolling.The volume fraction of α phase is closely related to the stability of γ phase.The possibility to eliminate earing effect by optimizing the processing parameters and controlling the texture formation was also discussed.