TITANIUM ALLOY SLAB FOR HOT ROLLING AND METHOD OF PRODUCING THE SAME

Japanese Patent JP2015080793

A

PROBLEM TO BE SOLVED: To provide a titanium alloy slab for hot rolling which enables surface property thereof after being hot rolled to be kept favorable even when omitting a blooming process or a finishing process, and to provided a method of producing the titanium alloy slab for hot rolling.SOLUTION: The titanium alloy slab for hot rolling is provided in which: a surface layer of a surface corresponding to a rolling surface, of a titanium alloy slab is subjected to melt and resolidification process of at least one time after slab melting; the depth of a melted and resolidified layer is 3 mm or more and is less than 15 mm; the structure of the melted and resolidified layer is an acicular structure; and the minor axis-direction width of the acicular structure is 10 μm or less. The titanium alloy slab is preferably melted by electron beam remelting or plasma remelting. Further, the melting of a surface layer is preferably performed by combining one kind, or two kinds or more of electron beam heating, induction heating and laser heating. Furthermore, the melted part is preferably set to be vacuum environment.

KUNIEDA TOMONORI
TATSUZAWA YOSHITSUGU
MORI KENICHI
TAKAHASHI KAZUHIRO
FUJII HIDEKI

JP2013219033A

April 27, 2015

October 22, 2013

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NIPPON STEEL & SUMITOMO METAL CORP

B21B1/02; B21B3/00; B22D29/00

JPS6428347A	1989-01-30
JP2007332420A	2007-12-27

Intellectual Property Office
Shunta Naito
Hisataka Tanaka
Katori Hideo

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