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1. 发明专利

JPH03199358A MANUFACTURE OF HIGH TOUGHNESS TI-AL INTERMETALLIC COMPOUND SERIES TI ALLOY MATERIAL 失效
公开(公告)号：JPH03199358A
公开(公告)日：1991-08-30
申请号：JP33938889
申请日：1989-12-27
申请人： MITSUBISHI MATERIALS CORP
发明人： KIKUCHI MINORU , SUGAWARA KATSUO , YAMABE YOKO
IPC分类号： C22F1/18 , C22C14/00 , C22F1/00
摘要： PURPOSE:To maintain the strength of the Ti alloy material and to improve its toughness by subjecting an alloy material constituted of Ti and Al to soln. treatment and aging treatment under prescribed conditions to form into a prescribed solid soln. phase (alpha phase) and a Ti-Al phase (gamma phase). CONSTITUTION:A Ti alloy material constituted of, by atom, 38 to 50% Al and the balance Ti is refined. The alloy material is subjected to soln. treatment under the condition of holding to 1200 to 1480 deg.C temp. (T deg.C) for prescribed time in a nonoxidizing atmosphere and thereafter executing rapid cooling to form into a structure contg. an alpha phase, >=95 areal%. Next, the alloy material is subjected to aging treatment of holding to 650 deg.C to (T deg.C-100 deg.C) for prescribed time in a nonoxidizing atmosphere and executing rapid cooling to obtain an alloy material from an alpha phase and a gamma phase. Then, the above gamma phase is formed into a fine lamellar structure having 0.02 to 1mum average thickness.

2. 发明专利

JPH06116691A METHOD FOR HEAT-TREATING TI-AL INTERMETALLIC COMPOUND SERIES TI ALLOY 失效
公开(公告)号：JPH06116691A
公开(公告)日：1994-04-26
申请号：JP29072592
申请日：1992-10-05
申请人： MITSUBISHI MATERIALS CORP
发明人： KIKUCHI MINORU , NAKAMURA HIDEYUKI , YAMABE YOKO
IPC分类号： C22C14/00 , C22F1/00 , C22F1/18
摘要： PURPOSE:To improve the toughness of a Ti-Al intermetallic compound series Ti alloy without deteriorating its strength, at the time of subjecting a Ti alloy having a specified compsn. to heat treatment, by executing massive transformation treatment between solution treatment and aging treatment therefor. CONSTITUTION:A Ti-Al intermetallic compound series Ti alloy constituted of, by atom, 41 to 50% Al and total 3 to 12% of one or >= two kinds among Nb, Mo and Cr, and the balance Ti with inevitable impurities is subjected to solution treatment in such a manner that it is held under heating to an alpha phase region and is thereafter rapidly cooled. By the solution treatment, its phase is formed into an alpha phase single phase, and after that, massive transformation treatment in which it is held under heating to a gamma phase single region in vacuum or in a nonoxidizing atmosphere of an inert gas or the like is executed. By the massive transformation treatment, its structure is formed into a sufficient massive gamma phase one, and after that, aging treatment in which it is held under heating in an alpha +beta phase region and is subsequently subjected to rapid cooling is executed. The Ti-Al intermetallic compound base Ti alloy subjected to the heat treatment by this method can sufficiently correspond as the structural member of various equipment exposed to the cycle of high temps. and ordinary temps. accompanied by high output.

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