Chromium-free coating for the electrical insulation of grain-oriented electrical steel strip

    公开(公告)号:US10597539B2

    公开(公告)日:2020-03-24

    申请号:US14936175

    申请日:2015-11-09

    摘要: The present invention relates to an aqueous composition based on phosphates, aluminum ions and other metal ions, in particular manganese ions and zinc ions, as well as silicates, siloxanes or silanes, for providing anticorrosive coatings on metal surfaces, in particular for the electrical insulation of grain-oriented electrical steel strip. For the desired functionality, the compositions according to the invention contain the constituents mentioned in a prescribed ratio to one another. The invention also relates to a method for coating the surface of a metallic workpiece by using the aqueous compositions, wherein the method produces outstanding results, in particular on grain-oriented electrical steel strip, with regard to corrosion protection and adherence.

    Electrical steel sheet
    6.
    发明授权

    公开(公告)号:US10549315B2

    公开(公告)日:2020-02-04

    申请号:US15536013

    申请日:2015-12-21

    摘要: An electrical steel sheet (1) includes a base material (2) of electrical steel, and an insulating film (3) formed on a surface of the base material (2), the insulating film (3) containing a polyvalent metal phosphate and Fe. A maximum value of a parameter Q expressed by “Q=CFe—O/CP” is equal to or less than 1.3 times and equal to or more than 1.09 times an average value of the parameter Q in a region from a first depth from a surface of the insulating film to a second depth, CFe—O denoting a proportion (atom %) of Fe bonded to O relative to all elements, and CP denoting a proportion (atom %) of P relative to all elements. The first depth is 20 nm from the surface, and the second depth is a depth where the proportion of P is equal to a proportion of metal Fe.

    Magnesium alloy material
    9.
    发明授权
    Magnesium alloy material 有权
    镁合金材料

    公开(公告)号:US08906294B2

    公开(公告)日:2014-12-09

    申请号:US13515169

    申请日:2010-12-06

    摘要: A magnesium alloy material having excellent impact resistance is provided. The magnesium alloy material is composed of a magnesium alloy that contains more than 7.5% by mass of Al and has a Charpy impact value of 30 J/cm2 or more. Typically, the magnesium alloy material has an elongation of 10% or more at a tension speed of 10 m/s in a high-speed tensile test. The magnesium alloy is composed of a precipitate, typically made of an intermetallic compound containing at least one of Al and Mg, and contains particles having an average particle size of 0.05 μM or more and 1 μm or less dispersed therein. The total area of the particles accounts for 1% by area or more and 20% by area or less. The magnesium alloy material containing fine precipitate particles dispersed therein has high impact absorption capacity through dispersion strengthening and has excellent impact resistance.

    摘要翻译: 提供了具有优异抗冲击性的镁合金材料。 镁合金材料由含有大于7.5质量%的Al并且具有夏氏冲击值为30J / cm 2以上的镁合金构成。 通常,在高速拉伸试验中,镁合金材料的拉伸速度为10m / s时的伸长率为10%以上。 镁合金由通常由包含Al和Mg中的至少一种的金属间化合物制成的沉淀组成,并且含有分散在其中的平均粒径为0.05μm以上且1μm以下的粒子。 颗粒总面积占面积的1%以上,面积以下为20%。 含有分散在其中的细沉淀颗粒的镁合金材料通过分散强化具有高冲击吸收能力并且具有优异的耐冲击性。