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    Processing grain oriented electrical steel
    41.
    发明公开
    Processing grain oriented electrical steel 失效
    on on ient i em em em em em em。。。。。。。。

    公开(公告)号：EP0304740A2

    公开(公告)日：1989-03-01

    申请号：EP88113114.8

    申请日：1988-08-12

    申请人： British Steel plc

    发明人： Beckley, Philip ,  Snell, David

    IPC分类号： C25F3/06 ,  C21D8/12

    CPC分类号： H01C1/16 ,  C21D8/1294 ,  C25F3/06 ,  Y10T428/1234

    摘要： This invention relates to a method of enhancing linear impressions formed in the surface of grain oriented electrical steel strip, by electrolytically etching said impressions with e.g. citric acid. The impressions may be formed by mechanical wheel scribing or by surface ablation, e.g. by spark discharge or laser treatment, and may be continuous or discontinuous in the form of spots or lines. In accordance with this invention therefore, the initial generation of light impressions in steel strip formed by mechanical wheel scribing or spark ablation techniques can readily be enhanced by application of the electrolytic etching technique to produce a material exhibiting values of power loss (reduced from the original unscribed loss value) which are substantially anneal-proof. In comparison, conventionally scribed material shows no resistance to a high temperature anneal as far as loss reduction is concerned.

    摘要翻译： 本发明涉及一种增强在晶粒取向电工钢带的表面形成的线性印模的方法， 柠檬酸。 印模可以通过机械轮划线或表面烧蚀形成。 通过火花放电或激光处理，并且可以以点或线的形式连续或不连续。 因此，根据本发明，通过应用电解蚀刻技术可以容易地提高通过机械轮划线或火花烧蚀技术形成的钢带中的初始的轻度印模，以产生表现出功率损失值（从原来的）减少的材料 未损伤损失值），其基本上是防止退火的。 相比之下，传统的划线材料表现出对高温退火的抗性，只要损失降低。

    SURFACE TREATMENT METHOD OF GALVANIZED STEEL SHEET PRODUCT AND GALVANIZED STEEL SHEET PRODUCT TREATED BY THE SAME
    43.
    发明公开
    SURFACE TREATMENT METHOD OF GALVANIZED STEEL SHEET PRODUCT AND GALVANIZED STEEL SHEET PRODUCT TREATED BY THE SAME 审中-实审

    公开(公告)号：EP4353877A2

    公开(公告)日：2024-04-17

    申请号：EP23203146.8

    申请日：2023-10-12

    申请人： Rexsteel Inc. ,  Daehan Corrugated Steel Pipe Co.

    发明人： Lee, Sun Woo ,  Lee, Yun Ji

    IPC分类号： C25F3/06 ,  C23C18/08 ,  C25D9/02

    CPC分类号： C25F3/06 ,  C25D9/02 ,  C23C18/08

    摘要： There is disclosed a surface treatment method of a steel sheet formed product including a first step of preparing a galvanized steel sheet formed product; a second step of performing surface-modification treatment for a galvanized layer of the prepared steel sheet formed product; a third step of coating a resin on the surface-modification-treated galvanized layer; and a fourth step of bring the resin coating layer into close contact on the galvanized layer. The second step may include a process of increasing a surface roughness by electrolytically etching the galvanized steel sheet formed product in a surface treatment composition solution. The surface treatment composition may be an eco-friendly baking soda solution, and the baking soda solution may be prepared by dissolving 10wt% to 50wt% of baking soda in water. The electrolytic corrosion may be performed by using the galvanized steel sheet formed product as an anode and lead or copper as a cathode, and the electrolytic corrosion may be performed by a voltage of 10V to 36V DC at a temperature of 60°C to 85°C. The third step may perform a process of re-coating a resin by general coating once or twice or more on the base steel sheet coated with a resin by a first electrodeposition coating.