Method for Manufacturing a Coated Part Using Hot Forming Techniques
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United States of America Patent
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Issued Date -
Sep 29, 2011
app pub date -
Dec 18, 2009
filing date -
Dec 19, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for manufacturing a coated part having very high mechanical properties using hot forming techniques. The method includes the steps of 1—providing a steel strip; 2—coating the steel strip with a layer of zinc or zinc alloy; 3—heating the coated steel to a temperature between 300° C. and the Ac1 temperature of the steel; 4—cooling the coated steel; 5—cutting a blank from the strip after step 1, 2, 3 or 4; 6—heating the blank to a temperature above the Ac1 temperature of the steel; 7—hot forming the blank into a part; and 8—hardening the hot formed part. The method can also be performed without step 4. The method can also be used for the indirect hot formed method. The method also relates to a method for manufacturing a coated steel strip, and to a coated steel strip, blank or part and a hot formed part.
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