Influence of differential speed rolling ratio on the ridging behavior of ultra purified 17%Cr ferritic stainless steel
Influence of differential speed rolling ratio on the ridging behavior of ultra purified 17%Cr ferritic stainless steel
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影响%20of%20差速%20速度%20滚动%20比率%20上%20%20成脊%20行为%20of%20超%20纯化%2017%Cr%20铁素体%20不锈钢%20钢
DOI：
10.1016/j.matchar.2017.11.049
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发表时间：
2018-01-01
影响因子：
4.7
通讯作者：
Li, Jing-yuan
中科院分区：
文献类型：
--
作者：
Lu, Cheng-zhuang;Fang, Zhi;Li, Jing-yuan
研究了差速轧制对超纯17%Cr铁素体不锈钢抗起脊性和织构演变的影响，以选择最佳工艺改善表面质量。在本研究中，进行了三种不同的冷轧工艺：常规冷轧和两个不同的速比不对称轧制。在常规冷轧中，铁素体不锈钢由于具有相似晶体取向的带状晶粒簇而出现明显的脊状。对于差速轧制，当应用更高的差速比时，起脊深度减小并且起脊不太明显。结果表明，严重的脊是由于γ-纤维（< 111 >//ND）取向的晶粒的带状集群的存在。差速轧制产生的剪切带能促进晶粒内部和晶界的再结晶形核，有效破碎取向相近的带状团簇，促进晶粒的随机取向，提高表面质量。
The effect of the differential speed rolling on the ridging resistance and the crystallographic texture evolution of ultra purified 17%Cr ferritic stainless steel was investigated in order to select the optimal procedure for improving the surface quality. In the present study, the three different cold rolling processes were carried out: a conventional cold rolling and two different speed ratios asymmetric rolling. In the conventional cold rolling, the ridging of ferritic stainless steel was pronounced due to the band-like clusters of grains with similar crystallographic orientations. For differential speed rolling, ridging depth decreased and ridging was less pronounced when a higher different speed ratio was applied. The results show that severe ridging is attributed to the presence of band-like clusters of gamma-fiber (< 111 > //ND) oriented grains. The shear bands introduced by differential speed rolling can enhance the nucleation for recrystallization both in grain interiors and grain boundaries, which can fragment the band-like clusters of similar orientation effectively, promoting the random grain orientation and improving surface quality.