LI Chang-sheng
,
YANG Hua
,
WANG Yan-fang
,
YU Yong-mei
钢铁研究学报(英文版)
The hot rolled strip of Fe-3Si steel was experimentally produced by thin slab casting and rolling (TSCR) process in the laboratory. The texture evolution rule was investigated during hot rolling and cold rolling. The texture distribution of cold rolled strips with four kinds of cold rolling reduction schedules was observed through X-ray diffraction method, and the orientation density variation of 1/16 layer, 1/8 layer, 1/4 layer, and 1/2 layer in thickness was analyzed. The cold rolled texture of steel A with four kinds of cold rolling reduction schedules was mainly composed of α and γ fibers. Cold rolling reduction ratio of 70% was more beneficial for obtaining more γ fibers. The γ fiber texture orientation density of {111}<011> and {111}<1 12> was the largest on the 1/8 layer and 1/4 layer and the least on the 1/16 layer and 1/2 layer for steel B. The texture orientation density of {001}-{223}<110> in the α fibers for steel C was increased, but the texture orientation density of {332}-{110}<110> was low.
关键词:
silicon steel
,
texture
,
hot rolling
,
cold rolling
,
thin slab
,
continuous casting
,
direct rolling
邓小旋
,
王强强
,
钱龙，王新华
,
黄福祥
钢铁
采用1∶1的水模型研究了5种不同底孔直径(16～28mm)的三孔水口下漏斗型薄板坯结晶器内的流场、液面特征和卷渣行为。结果表明：在常规工艺参数下，5种三孔水口下结晶器内钢液的流场都是典型的“双辊流”，且流场稳定；在5种三孔水口下结晶器液面波动都较平稳，且波动范围都在±(3～5)mm之间。5种不同水口下结晶器液面主要发生剪切卷渣，漩涡卷渣很少发生。试验得知：在水口浸入深度280mm，拉速为5m/min时，剪切卷渣发生的钢液临界表面速度是0.32m/s，与文献报道的模型计算值较吻合。在水口浸入深度280mm、拉速为5m/min的条件下，适合薄板坯连铸的最佳的三孔水口的底孔直径为22mm。
关键词:
三孔水口
,
thin slab
,
continuous casting
,
optimization
,
mold
,
slag entrapping
