专利类型:  发明专利
申请号:  EP12796078
申请日期:  2012-04-27
公开号:  EP2719781B1
公开日期:  2016-09-14
申请人:  NHK SPRING CO LTD
发明人:  SHIRAISHI TOHRU;ONO YOSHIKI;ARAOKA YUJI
地址:  
摘要:  A high strength titanium alloy member with superior fatigue resistance, and a production method therefor, are provided. The titanium alloy member is made of an inexpensive α-β type titanium alloy having broad utility and has high proof stress and high strength from the surface to the entire interior portion, while having great compressive residual stress provided from the surface to deep in the interior. The production method includes preparing a raw material made of titanium alloy, nitriding the raw material to form a nitrogen-containing raw material by generating a nitrogen compound layer and/or a nitrogen solid solution layer in a surface layer of the raw material, mixing the raw material and the nitrogen-containing raw material to yield a nitrogen-containing mixed material, sintering the nitrogen-containing mixed material to obtain a sintered titanium alloy member by bonding the material together and uniformly diffusing nitrogen in solid solution from the nitrogen-containing raw material to the entire interior portion of the sintered titanium alloy member, hot plastic forming and/or heat treating the sintered titanium alloy member to obtain a processed member, and surface treating the processed member to provide compressive residual stress.
主权项:  A method for producing a titanium alloy member, comprising: preparing a raw material made of titanium alloy; nitriding the raw material to form a nitrogen-containing raw material by generating a nitrogen compound layer and/or a nitrogen solid solution layer in a surface layer of the raw material; mixing the raw material and the nitrogen-containing raw material to yield a nitrogen-containing mixed material; sintering the nitrogen-containing mixed material to obtain a sintered titanium alloy member by bonding the material together and uniformly diffusing nitrogen in solid solution from the nitrogen-containing raw material to the entire interior portion of the sintered titanium alloy member; hot plastic forming and/or heat treating the sintered titanium alloy member to obtain a processed member; and surface treating the processed member to provide compressive residual stress.
专利分类号:  C22C1/04;C23C8/80;C22F1/18;C22C14/00;A61L27/06;C23C26/00;B22F3/24
专利状态:  有效专利
代理人:  
代理机构:  Eisenführ, Speiser & Partner
国家及地区:  
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