PROCESS FOR THE MANUFACTURE OF A CONTAINMENT DEVICE AND A CONTAINMENT DEVICE MANUFACTURED THEREBY
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United States of America Patent
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Issued Date -
Feb 12, 2009
app pub date -
Oct 26, 2005
filing date -
Oct 26, 2004
priority date (Note) -
Abandoned
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Abstract
A process for manufacturing a containment device including: providing steel slab including (in wt. %) C: 0.05%-0.4%; Si: ≦2.0%; Mn: ≦2.0%; P: ≦0.1%; N: ≦200 ppm; remainder iron and inevitable impurities; hot rolling the slab to steel strip after reheating the slab, or utilizing the casting heat by hot-charging the slab, or by direct rolling the slab after casting, followed by cooling the strip to coiling temperature and coiling; cold rolling the strip at between 40 and 95% thickness reduction to form cold-rolled strip; continuous annealing by reheating to temperature above Ac1, homogenising at least 5 seconds, followed by rapid cooling; producing the device. The device has steel at least 10 vol. % martensite and/or bainite and reduced properties of anisotropy. Containment device manufactured by the process and producing isolation barrier material for high temperature and/or pressure sealing for containment devices are also disclosed.
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