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我们的研究表明,钢中适量Al与N的存在可显著降低热轧前的板坯加热温度。用热氢抽取法测定了钢中固溶氮和AlN中的氮,指出钢中Al与N主要是通过形成弥散的AlN抑制相,保证二次再结晶的顺利进行。此项研究为利用我国资源和现有设备生产优质冷轧取向硅钢提供了必要的技术和工艺参数。为深入理解应力涂层降低损耗的机理,系统研究了硅钢磁畴结构的张力效应。结果表明:(1)180°畴端面的真实闭合畴结构远较文献中惯用的模型复杂;(2)张应力使180°畴细化,并不靠180°壁的移动,而有赖于反向磁化畴-匕首畴的长大。压应力效应的研究指出,除文献中提到的横向条状畴外,在更高的压力下将出现“人”字畴纹。并提出了“人”字形压应力畴纹的结构模型。
Our research shows that the proper amount of Al and N in the steel can significantly reduce the slab heating temperature before hot rolling. Nitrogen in solid solution and nitrogen in AlN were determined by hot hydrogen extraction method. It was pointed out that Al and N in steel mainly formed dispersed AlN inhibition phase to ensure the smooth progress of secondary recrystallization. This study provides the necessary technical and process parameters for the production of high-quality cold-rolled oriented silicon steel using our resources and existing equipment. In order to understand the mechanism of stress coating to reduce the loss, the tension effect of the magnetic domain structure of silicon steel was systematically studied. The results show that: (1) the real closed domain structure of 180 ° domain end faces is far more complicated than the conventional models in the literature; (2) the tensile stress makes the 180 ° domains thin and does not depend on the movement of 180 ° walls, Magnetized domain - Dagger domain growth. Studies of compressive stress indicate that “human” domain lines will appear at higher pressures, in addition to the lateral striped domains mentioned in the literature. The structural model of “human” shaped compressive stress domain lines is proposed.