Fe-Cr ALLY BILLET AND METHOD FOR PRODUCTION THEREOF

Title:

Fe-Cr ALLY BILLET AND METHOD FOR PRODUCTION THEREOF

Document Type and Number:

WIPO Patent Application WO/2004/103589

Kind Code:

A1

Abstract:

A Fe-Cr alloy billet, characterized in that a high area % as high as 70 area % or more of the higher draft surface thereof is coated with a scale layer; a method for producing a Fe-Cr alloy billet wherein an ingot is subjected to blooming without de-scaling of the ingot. The Fe-Cr alloy billet allows the reduction of the thrust or enfoldment therein of scales and allows the significant reduction of the surface treatment prior to the manufacture of a tube in the production of a billet for a seamless tube. The employment of the Fe-Cr alloy billet for the production of a seamless tube allows the production of a Fe-Cr alloy steel tube being comparatively difficult to manufacture with a reduced cost with good efficiency, which leads to the widespread application thereof in the field of the production of a hot seamless steel tube.

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Inventors:

HIDAKA YASUYOSHI (JP)
ANRAKU TOSHIRO (JP)
YAMAKAWA TOMIO (JP)
KITAMURA YASUFUMI (JP)

Application Number:

PCT/JP2004/007223

Publication Date:

December 02, 2004

Filing Date:

May 20, 2004

Export Citation:

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Assignee:

SUMITOMO METAL IND (JP)
HIDAKA YASUYOSHI (JP)
ANRAKU TOSHIRO (JP)
YAMAKAWA TOMIO (JP)
KITAMURA YASUFUMI (JP)

International Classes:

B21B1/02; C22C38/00; C22C38/18; B21B3/02; B21B9/00; B21B45/00; (IPC1-7): B21B1/02; B21B45/00; C22C38/00; C22C38/18

Foreign References:

JPH05228507A	1993-09-07
JPH06100931A	1994-04-12
JPH10277912A	1998-10-20
JPH08174034A	1996-07-09
JPH06306455A	1994-11-01
JPH11342404A	1999-12-14
JPH07178420A	1995-07-18
JPH07204703A	1995-08-08

Other References: