Method for the heat treatment of extended steel products

Metal treatment – Process of modifying or maintaining internal physical... – With measuring – testing – or sensing

Reexamination Certificate

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Details

C148S648000

Reexamination Certificate

active

07618501

ABSTRACT:
A method for the heat treatment of extended steel products such as, for example, rods, pipes, work pieces, etc., while the products are in motion. The products (13, 14, 33, 34, 35) are caused to be heated by DFI burners (6-11, 16-20) (where “DFI” is an abbreviation for “direct flame impingement”), which burners are caused to be located such that one set of burners (6, 7, 8, 9, 10, 11), (16, 17, 18, 19, 20) essentially covers the circumference of the products, and in the burners are caused to be located integrated into arrangements (2-4, 13) that transport the product in a direction that is perpendicular to a plane in which the flames of the burners essentially lie.

REFERENCES:
patent: 3291465 (1966-12-01), Wilde
patent: 3409217 (1968-11-01), Gentry
patent: 4373706 (1983-02-01), Elhaus et al.
patent: 4889483 (1989-12-01), Gentry
patent: 0 760 397 (1997-03-01), None
patent: 09019710 (1997-01-01), None
patent: 2002-239601 (2002-08-01), None
patent: 03/070992 (2003-08-01), None
patent: WO 03/070992 (2003-08-01), None
patent: WO 2006/008169 (2006-01-01), None
patent: 2006/088169 (2006-08-01), None
International Preliminary Report on Patentability, dated Apr. 23, 2009 and issued in corresponding International Patent Application No. PCT/SE2007/051029.

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