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Basic Investigation of CVD Method for Manufacturing 6.5% Si Steel Sheet

机译：CVD法生产6.5％Si钢板的基础研究

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摘要

It has been known for a long time that 6.5% Si steel sheet has excellent soft magnetic properties that make it well suited for use as a magnetic material. However, steel of that composition is brittle and has little ductility; for this reason, the material could not be manufactured on an industrial scale with conventional cold rolling methods. Here, the authors studied and devised a method for continuously producing 6.5% Si steel sheet utilizing the CVD (Chemical Vapor Deposition) method. In this method, 6.5% Si steel sheet is continuously produced with the following procedure: first, low-Si steel, an easy-to-roll material, is rolled beforehand to produce thin strip; then, the CVD treatment using a gas containing SiCl_4 is applied to the strip so that silicon is permeated through the surface of the steel strip; and finally, the strip is given a diffusion annealing to uniformly distribute the silicon throughout. While the siliconizing of steel has previously been studied as a way to improve the corrosion resistance of steel, this work marks the first study of this method as a way to produce 6.5% Si steel sheet on an industrial scale. The authors examined the basic conditions required for the process—the process for manufacturing 6.5% Si steel sheet utilizing this type of CVD-based siliconizing treatment technology—by carrying out a theoretical study of related chemical reactions and performing basic research with a simple test apparatus. Based on the results, the authors next conducted an investigation to develop a method for continuously manufacturing the steel in coil form and finally proposed an overall process configuration to realize such a production system.
机译：长期以来，已知6.5％Si钢板具有优异的软磁性质，使其非常适合用作磁性材料。但是，这种成分的钢是脆性的，并且延展性差。因此，无法使用常规的冷轧方法以工业规模制造该材料。在此，作者研究并设计了一种利用CVD（化学气相沉积）方法连续生产6.5％Si钢板的方法。在该方法中，通过以下步骤连续地生产6.5％的Si钢板：首先，将容易轧制的低Si钢预先进行轧制，从而制造薄带。然后，使用包含SiCl_4的气体的CVD处理被施加到钢带上，使得硅渗透通过钢带的表面。最后，对带钢进行扩散退火，以使硅均匀地分布到整个区域。虽然以前已经研究过将钢的硅化作为提高钢的耐腐蚀性的方法，但这项工作标志着该方法的首次研究是作为以工业规模生产6.5％Si钢板的一种方法。作者通过进行相关化学反应的理论研究并使用简单的测试设备进行了基础研究，从而检验了该过程所需的基本条件-利用这种基于CVD的硅化处理技术制造6.5％Si钢板的过程。 。基于这些结果，作者接下来进行了研究，以开发一种连续制造卷材形式的钢的方法，并最终提出了实现这种生产系统的总体工艺配置。

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