这种热处理方法由日本钢铁公司研究发明 ,现已取得了日本发明专利权。晶粒取向电工钢板的脱碳热处理分两个阶段进行 ,将氧的含量控制在 0 .0 3%～ 0 .0 7%。热处理的第一阶段将温度控制在 75 0～ 880℃ ,在大气中进行脱碳处理 ,并将 H2 O对 H的分压比控制在 0 .1 5～ 0 .75 ;第 The heat treatment method invented by the Japanese steel company, has now made Japan’s invention patents. The decarburization heat treatment of the grain oriented electrical steel sheet is carried out in two stages, and the oxygen content is controlled at 0.003-0.07%. The first stage of heat treatment will be controlled at a temperature of 75 0 ~ 880 ℃, decarbonization in the atmosphere, and the partial pressure ratio of H2 O to H controlled at 0 .15 ~ 0 .75;