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Aluminum plated steel sheet for rapid heating hot-stamping, production method of the same and rapid heating hot-stamping method by using this steel sheet
US8992704B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8992704-B2 |
| Application number | US-73739809-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 13, 2009 |
| Priority date | Jul 11, 2008 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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The present invention solves the problem of melting of Al in heating before hot-stamping, which had been a problem in the past in applying hot-stamping to Al-plated steel sheet, and provides Al-plated steel sheet for hot-stamping and a method of hot-stamping using that Al-plated steel sheet to solve the problem of delayed fracture due to residual hydrogen, and, furthermore, a method of a rapid heating hot-stamping using that Al-plated steel sheet. The Al-plated steel sheet of the present invention is produced by annealing the Al-plated steel sheet as coiled in a box-anneal furnace for the time and at the temperature indicated in FIG. 5 , and alloying of a plated Al and a steel sheet. Further, a method of rapid heating hot-stamping in the present invention is characterized by cutting out a stamping blank of an Al-plated steel sheet, and heating that blank in heating before hot-stamping by an average temperature with a rising rate of 40° C./sec or more and a time of exposure to an environment of 700° C. or more of 20 seconds or less, and then hot-stamping it.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of production of aluminum plated steel sheet for rapid heating hot-stamping, the method comprising: annealing aluminum plated steel sheet in a coil state in a box annealing furnace, the aluminum plated steel sheet in the coil state having aluminum plating deposited in an amount of 30 to 100 g/m 2 per side; wherein when the annealing retention time and annealing temperature are plotted in an XY plane, wherein the retention time is the X-axis…
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Classifications
- C21D8/02Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US8992704B2 cover?
- The present invention solves the problem of melting of Al in heating before hot-stamping, which had been a problem in the past in applying hot-stamping to Al-plated steel sheet, and provides Al-plated steel sheet for hot-stamping and a method of hot-stamping using that Al-plated steel sheet to solve the problem of delayed fracture due to residual hydrogen, and, furthermore, a method of a rapid …
- Who is the assignee on this patent?
- Maki Jun, Abe Masayuki, Kusumi Kazuhisa, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C21D8/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).