Cu在高磁感取向硅钢中的作用

THE ROLE OF COPPER IN A HIGH INDUCTION GRAIN ORIENTED SILICON STEEL

本文采用透射电镜手段研究了Ｃｕ在高磁感取向硅钢Ｈｉ－Ｂ中的作用。结果发现，加ＣｕＨｉ－Ｂ钢在热轧过程中形成大量（Ｃｕ，Ｍｎ）＿（１．８）Ｓ和（Ｍｎ，Ｃｕ）Ｓ质点，前者较后者更加细小。随着硫化物质点尺寸的减小，质点中Ｃｕ相对于Ｍｎ的比例不断提高。由此证明，加Ｃｕ起到了提高硫化物析出量，减小硫化物质点尺寸的作用。同时发现，热轧时形成的硫化物质点经１１２０℃高温常化后发生了明显粗化。另外，在常化及脱碳板中，硫化物一般是以硫化物＋ＡＩＮ复合质点的形式存在，并且（Ｍｎ，Ｃｕ）Ｓ与ＡＩＮ之间存在（２１１０）ＡＩＮ／／（１１０）＿（Ｍｎ，Ｃｕ）Ｓ取向关系。

The role of copper in a high induction grain oriented silicon steel wasstudied by TEM. It was found that during the hot rolling, a large amount of(Cu,Mn),8S and(Mn,Cu)S particles precipitated.The former is finer than the lat-ter. The contents of Cu in Sulphide particles,relative to that of Mn ,increase continu-ously with decreasing particle size. Therefore,it may be concluded that Cu plays arole of increasing the arnount of sulphide and decreasing the particle size. Besides,thesulphide particles precipitated in the hot roling process were coarsened Obviouslyduring the normalizing annealing. Finally, it was also discovered that in the normal-ized and decarburized sheets,the sulphide existed generally in the form of sulphide+AlN compound particles,and that(Mn,Cu)S and AIN had the orientation relation of(2110)_(AIN)//(110)_((Mn,Cu)S).