材料期刊网

本文采用金相蚀坑法对高磁感取向硅钢成品中细晶进行了研究,证明板坯加热温度过高,热轧板产生粗大的形变组织,促使初次再结晶{100}<011>-<001>组分增强,该区域晶粒也较粗大,高温退火后,成品中出现线晶。热轧板坯加热温度太低,热轧前的MnS和AlN不能完全固溶,成品中出现混晶。另外,指出提高钢中碳含量,增加热轧的压下率,采用二次冷轧法都可减少或消除成品中的线晶。

The fine grains in the product of oriented-grain silicon steel sheet with high induction has been investigated using metallographic etch pits technique. It was Shown that by the slab reheated under an exceedingly high temperature,the hot rolled band of large elongated grain structure may be produced, and its {100}<011>-<001> components in the primary recrystallization texture enhanced.In these regions the primaries are enlarged and the lined grain structure is appeared after final annealing, while the slab reheated under lower temperature, the product in which the solution of the MnS and A1N has not be completed yet,may be obtained with mixed grain structure. In addition, it is presented that the lined fine grain structure could be reduced or prevented by increasing carbon content of the steel, by raising hot reduction or by adopting two stages in cold rolled process.