PLUG FOR ROLLING SEAMLESS STEEL PIPE, METHOD FOR MANUFACTURING SAID PLUG, AND METHOD FOR MANUFACTURING SEAMLESS STEEL PIPE IN WHICH SAID PLUG IS USED

Title:

PLUG FOR ROLLING SEAMLESS STEEL PIPE, METHOD FOR MANUFACTURING SAID PLUG, AND METHOD FOR MANUFACTURING SEAMLESS STEEL PIPE IN WHICH SAID PLUG IS USED

Document Type and Number:

WIPO Patent Application WO/2014/041787

Kind Code:

A1

Abstract:

The present invention provides a technique for dramatically extending the life of a plug used when rolling high-alloy-steel seamless steel pipe or in other similarly harsh conditions. Specifically, a plug for rolling seamless steel pipe in which the surface of a metallic parent material is clad with Co or a Co alloy, and an oxide layer comprising a Co-based oxide is formed on the surface of the clad layer, as well as a method for manufacturing the plug and a method for manufacturing seamless steel pipe in which the plug is used.

Inventors:

IGUCHI TAKAAKI (JP)
KATSUMURA TATSURO (JP)
KIMURA HIDETO (JP)

Application Number:

PCT/JP2013/005324

Publication Date:

March 20, 2014

Filing Date:

September 09, 2013

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B21B25/00; C23C8/12; C23C28/00

Domestic Patent References:

WO2006106637A1

2006-10-12

Foreign References:

JPH06315704A	1994-11-15
JPH02112805A	1990-04-25
JPH08193241A	1996-07-30
JPS60137511A	1985-07-22
JPS63203205A	1988-08-23
JPS6250038A	1987-03-04
JP2001038408A	2001-02-13
JP2007160338A	2007-06-28
JP2003129184A	2003-05-08

Other References: