双辊铸轧奥氏体不锈薄带显微组织分析

对在异径双辊铸轧机上进行铸轧实验所得不锈钢薄带进行了显微组织分析·结果表明,铸轧不锈钢薄带的组织与常规铸造相比有很大不同,晶粒组织得到显著细化,组织形态和分布均有异于常规铸造组织·但是从其组织分布特征及奥氏体和铁素体的质量分数来看,铸轧薄带的组织与焊缝中的铸态组织相比有极大的相似性,这是由于其熔池的热力学特点的相似性决定的,因而可以用分析焊缝中组织特征的一些方法来分析铸轧薄带的组织特征

Microstructure of the Twin-Roll Cast Stainless Steel Strip

Experimental study on the twin roll strip casting of stainless steel was carried out using laboratory twin unequal diameter roll caster,and the microstructure of the cast strip was analyzed. The results show that the grains of the strip are refined,and the morphology and distribution of the microstructure is also different from that of the conventional cast products. But from the view of its microstructure distribution and the percentage composition of ferrite and austenite,it has great similarity with the casting microstructure of weld seam. It is owing to the great similarity of thermodynamics conditions in their molten pool. So the analysis methods that are used to analyze the weld seam can be used to analyze the structure of twin roll cast strip.