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US 10,648,055 B2Granted
Method of producing press-hardened and coated steel parts at a high productivity rate
AssigneeArcelorMittal
InventorsMichel Sanadres, Christine Dessain
Life of this patent
Estimating the term…
Abstract
A sheet or blank is provided which includes a substrate and pre-coating on at least one face of the substrate. A polymerized layer overlies at least a part of the pre-coating and has a thickness from 2 μm to 30 μm, a nitrogen content of less than 1% by weight, carbon pigments in a quantity from 3 to 30% by weight and does not include a polymer with silicon. A welded blank, part and fabrication methods are also provided.
Claims12
A sheet or pre-coated blank comprising:
- a steel substrate for heat treatment having;
- a pre-coating on at least one face of the steel substrate, the pre-coating including at least one layer of aluminum or aluminum alloy;
- a polymerized layer directly contacting at least a part of the pre-coating, the polymerized layer having a thickness from 2 μm to 30 μm, the polymerized layer comprising a polymer resin and carbon pigments, wherein the polymer resin consists of an acrylic resin or an epoxy resin, wherein the polymer resin does not contain silicon, wherein the polymerized layer has a nitrogen content of less than 1% by weight and wherein carbon pigments are present in the polymerized layer in a quantity from 3 to 30% by weight.
Dependencies are inferred from the claim text.