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本发明是关于制造晶粒取向硅钢的一种改进。美国专利第3957546号叙述了关于制造高导磁率的晶粒取向硅钢的工艺。若就实质而言,上述美国专利把获得高导磁率的原因归结为微量硼的存在和控制锰硫比。特别是该专利要求锰硫比的最大比值为1.8,现通过本专利提供一种制造高磁感硅钢的工艺,即把锰硫比不限制在上述专利的规定值,却能制造出在10奥斯特下.导磁率至少为1870,甚至达到1900
The present invention relates to an improvement in the manufacture of grain-oriented silicon steel. U.S. Patent No. 3,957,546 describes a process for manufacturing grain-oriented silicon steel of high magnetic permeability. In essence, the above U.S. patent attributed the reason for obtaining high permeability to the presence of a trace amount of boron and the control of manganese to sulfur ratio. In particular, this patent requires a maximum ratio of manganese to sulfur ratio of 1.8. Now, the present patent provides a process for manufacturing high-magnetic silicon steel, that is, the manganese-sulfur ratio is not limited to the above-mentioned patent’s specified value, Under the magnetic permeability of at least 1870, even up to 1900