LAMINATED HARNESS STEEL FOR HOT PRESSING AND METHOD OF HOT PRESSING OF LAMINATED HARNESS STEEL

摘要

1. Clad steel sheet for use in hot pressing, characterized in that it is a clad steel sheet for use in hot pressing, which comprises a steel sheet clad with an Al layer that is formed on one surface or on both surfaces of said steel sheet, and a surface coating a layer that is formed on said Al cladding layer, said surface coating layer containing at least one zinc compound selected from the group consisting of hydro ide Zinc and zinc salts and organic kisloty.2. Clad steel sheet for use in hot pressing according to claim 1, characterized in that the amount of precipitated zinc compounds in the specified surface coating layer is from 0.5 g / mdo to 7 g / m surface per Zn. 3. Clad steel sheet for use in hot pressing according to claim 2, characterized in that said surface coating, in addition to said zinc compound, contains at least one component of a polymer ingredient, a silane coupling agent or silicon oxide, in a total amount of from 5 % of the mass. up to 30% by weight, based on the total amount of said zinc compound. 4. Clad steel sheet for use in hot pressing according to any one of paragraphs. 1-3, characterized in that the clad Al-layer contains Si: from 3% to 15% .5. Clad steel sheet for use in hot pressing according to any one of paragraphs. 1-3, characterized in that it allows, as contained in the specified zinc compounds, the introduction of one or both of zinc sulfate and zinc nitrate, in wt%: respectively 10% or less. 6. Clad Steel Fox