Title:
PRODUCTION OF HIGH-DENSITY SINTERED TITANIUM ALLOY
Document Type and Number:
Japanese Patent JP3113144
Kind Code:
B2
Abstract:
PURPOSE: To produce a sintered Ti alloy at a low cost at the time of producing a sintered Ti alloy product by a powder metallurgical process from a Ti powder which has been hydrogenated and then dehydrogenated and having a specified content of hydrogen by heating the compact consisting essentially of Ti powder under specified conditions and then sintering the compact.
CONSTITUTION: The hydrogen content of the Ti produced by the hydrogenation- dehydrogenation process is controlled to about 0.02-2wt.%, which is higher than the allowable hydrogen content, i.e., ≤0.01wt.%, of the Ti as the powder metallurgical material, and a heating power cost for dehydrogenation is reduced. The powder of such alloying elements as Al and V is then admixed with the Ti powder, the mixed powder is then packed in a vessel, compacted, heated at 600-800°C for 10-30hr in vacuum or in an inert gas atmosphere, presintered and dehydrogenated, and hydrogen remaining in the powder is reduced to ≤0.01wt.%. The dehydrogenated powder is then sintered at 1000-13000°C for ≥1hr to close the void due to the hydrogen liberated during the dehydrogenation, and a high-density sintered Ti alloy product is inexpensively produced at a low heating cost.
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Inventors:
Hideki Fujii
Noboru Takahisa
Masao Yamamiya
Wataru Kagohashi
Eiichi Fukasawa
Michiharu Kohno
Noboru Takahisa
Masao Yamamiya
Wataru Kagohashi
Eiichi Fukasawa
Michiharu Kohno
Application Number:
JP7110994A
Publication Date:
November 27, 2000
Filing Date:
April 08, 1994
Export Citation:
Assignee:
Nippon Steel Corporation
Toho Titanium Co., Ltd.
Toho Titanium Co., Ltd.
International Classes:
B22F3/10; B22F9/02; C22C1/04; (IPC1-7): B22F3/10; C22C1/04
Attorney, Agent or Firm:
Hiroaki Tamura (1 outside)