TITANIUM SLAB FOR HOT ROLLING, AND PRODUCTION METHOD THEREFOR

Title:

TITANIUM SLAB FOR HOT ROLLING, AND PRODUCTION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2016/051502

Kind Code:

A1

Abstract:

A melted and resolidified layer, which has a depth of at least 1 mm and is obtained by adding, melting, and resolidifying at least one β-phase-stabilizing element, is provided to the surface to be rolled of a titanium slab comprising a titanium alloy produced using an electron beam melting method or a plasma arc melting method. The average concentration of the β-phase-stabilizing element in a range up to a depth of 1 mm is at least 0.08 mass% but not more than 1.50 mass% higher than the concentration of the β-phase-stabilizing element in the parent metal. Powder, chippings, wire, and foil are used as raw materials which include the β-phase-stabilizing element. Furthermore, electron beam heating and plasma arc heating are used as means for melting the surface layer.

Inventors:

TATSUZAWA YOSHITSUGU (JP)
KUNIEDA TOMONORI (JP)
MORI KENICHI (JP)
FUJII HIDEKI (JP)
TAKAHASHI KAZUHIRO (JP)

Application Number:

PCT/JP2014/076083

Publication Date:

April 07, 2016

Filing Date:

September 30, 2014

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

C23C26/00; B21B1/02; B21B3/00; B22D21/06; B22D29/00; C22C14/00

Domestic Patent References:

WO2014163087A1

2014-10-09

Foreign References:

JP2007332420A	2007-12-27
JPH09314278A	1997-12-09

Other References: