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1. 发明申请

US20170356076A1 TITANIUM ALLOY MEMBER AND METHOD FOR MANUFACTURING THE SAME 审中-公开
公开(公告)号：US20170356076A1
公开(公告)日：2017-12-14
申请号：US15529188
申请日：2015-11-30
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Kenichi MORI , Hideki FUJII
IPC分类号： C23C8/24 , C22C14/00
摘要： There is provided a titanium alloy member including a base metal portion, and an outer hardened layer formed on an outer layer of the base metal portion, the cross sectional hardness of the base metal portion is 330 HV or higher and lower than 400 HV, the cross sectional hardnesses at positions 5 μm and 15 μm from the surface of the outer hardened layer are 450 HV or higher and lower than 600 HV, the outer hardened layer includes an oxygen diffusion layer and a nitrogen diffusion layer, the oxygen diffusion layer is at a depth of 40 to 80 μm from the surface of the outer hardened layer, and the nitrogen diffusion layer is at a depth of 2 to 5 μm from surface of the outer hardened layer. This titanium alloy member includes an outer hardened layer, is high in cross sectional hardness of the base metal portion, and is excellent in fatigue strength and wear resistance.

2. 发明申请

US20170321312A1 TITANIUM ALLOY HAVING HIGH STRENGTH, HIGH YOUNG'S MODULUS, EXCELLENT FATIGUE PROPERTIES, AND EXCELLENT IMPACT TOUGHNESS 审中-公开
公开(公告)号：US20170321312A1
公开(公告)日：2017-11-09
申请号：US15522916
申请日：2014-11-28
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Akira KAWAKAMI , Hideki FUJII , Kenichi MORI , Tomoyuki KITAURA
IPC分类号： C22F1/18 , C22C14/00
摘要： Provided is an α+β titanium alloy hot-rolled sheet consisting of, in mass %, Al: 4.7 to 5.5%, Fe: 0.5 to 1.4%, N: less than or equal to 0.03%, Si: 0.15 to 0.40%, a ratio of Si/O: 0.80 to 2.80, [O]eq in Expression (1): more than or equal to 0.13% and less than 0.25%, and the balance: Ti and impurities. In a case where an ND direction represents a normal direction of the hot-rolled sheet, a TD direction represents a sheet-width direction of the hot-rolled sheet, a c-axis orientation represents a normal direction of a (0001) plane in an α phase, XND represents a strongest intensity among X-ray (0002) reflection relative intensities of crystal grains in which the c-axis orientation is in a range of 30° from the ND direction, and XTD represents a strongest intensity among intensities in which the c-axis orientation is in a range of ±10 degrees in the TD direction, XTD/XND is more than or equal to 4.0, a Young's modulus in the sheet-width direction is more than or equal to 135 GPa, and tensile strength in the sheet-width direction is more than or equal to 1100 MPa, [O]eq=[O]+2.77[N] Expression (1).

3. 发明申请

US20180216211A1 TITANIUM COMPOSITE MATERIAL AND TITANIUM MATERIAL FOR HOT ROLLING 审中-公开
公开(公告)号：US20180216211A1
公开(公告)日：2018-08-02
申请号：US15747453
申请日：2016-07-29
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Yoshitsugu TATSUZAWA , Tomonori KUNIEDA , Koji MITSUDA , Kenichi MORI , Kzuhiro TAKAHASHI , Hideki FUJII , Tomoyuki KITAURA
IPC分类号： C22C14/00 , B32B15/01 , C22F1/18
CPC分类号： C22C14/00 , B21B1/02 , B21B3/00 , B21B3/003 , B23K15/00 , B23K20/04 , B32B15/01 , C22F1/00 , C22F1/18 , C22F1/183
摘要： A titanium composite material 1 is provided that includes: an inner layer 5 consisting of a commercially pure titanium or a titanium alloy; an outer layer 3 formed on at least one surface of the inner layer 5 and having a chemical composition that is different from a chemical composition of the inner layer 5; and an intermediate layer formed between the inner layer 5 and the outer layer 3 and having a chemical composition that is different from the chemical composition of the inner layer 5. The thickness of the outer layer 3 is 2 μm or more, and occupies no more than 40% of the overall thickness per side. The thickness of the intermediate layer is 0.5 μm or more. Despite being inexpensive, this titanium composite material has desired characteristics.

4. 发明申请

US20170362686A1 BETA-TYPE TITANIUM ALLOY 审中-公开
公开(公告)号：US20170362686A1
公开(公告)日：2017-12-21
申请号：US15695143
申请日：2017-09-05
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Kazuhiro TAKAHASHI , Hideki FUJII , Kenichi MORI
IPC分类号： C22C14/00 , C22F1/18 , C22F1/00
CPC分类号： C22C14/00 , C22F1/00 , C22F1/18
摘要： The present invention provides a β-type titanium alloy that includes, by mass %, when Al: 2 to 5%, 1) Fe: 2 to 4%, Cr: 6.2 to 11%, and V: 4 to 10%, 2) Fe: 2 to 4%, Cr: 5 to 11%, and Mo: 4 to 10%, or 3) Fe: 2 to 4%, Cr: 5.5 to 11%, and Mo+V (total of Mo and V): 4 to 10% in range, and a balance of substantially Ti. These include Zr added in amounts of 1 to 4 mass %. Furthermore, by making the oxygen equivalent Q 0.15 to 0.30 or leaving the alloy in the work hardened state or by applying both, the tensile strength before aging heat treatment can be further increased.

5. 发明申请

US20170349973A1 TITANIUM CASTING PRODUCT FOR HOT ROLLING AND METHOD FOR PRODUCING THE SAME 审中-公开
公开(公告)号：US20170349973A1
公开(公告)日：2017-12-07
申请号：US15513776
申请日：2014-09-30
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Yoshitsugu TATSUZAWA , Tomonori KUNIEDA , Kenichi MORI , Hideki FUJII , Kazuhiro TAKAHASHI
IPC分类号： C22C1/02 , B21B3/00 , B21B1/22 , C22C14/00 , B22D21/06
CPC分类号： C22C1/02 , B21B1/02 , B21B1/22 , B21B3/00 , B21B2001/225 , B22D21/06 , B22D29/00 , C22C14/00 , C23C26/00
摘要： Provided is a titanium casting product made of titanium alloy, the titanium casting product being produced by electron-beam remelting or plasma arc remelting, comprising: a melted and resolidified layer in a range of 1 mm or more in depth at a surface serving as a surface to be rolled, the melted and resolidified layer being obtained by adding one or more kinds of β stabilizer elements to the surface and melting and resolidifying the surface. An average value of β stabilizer element concentration in a range of within 1 mm in depth is higher than β stabilizer element concentration in a base material by, in mass %, equal to or more than 0.08 mass % and equal to or less than 1.50 mass %. As the material containing the β stabilizer element, powder, a chip, wire, or foil is used. As means for melting a surface layer, electron-beam heating and plasma arc heating are used.

6. 发明申请

US20170283928A1 TITANIUM CAST PRODUCT FOR HOT ROLLING HAVING EXCELLENT SURFACE PROPERTIES AFTER HOT ROLLING EVEN WHEN SLABBING STEP AND FINISHING STEP ARE OMITTED, AND METHOD FOR PRODUCING SAME 审中-公开
公开(公告)号：US20170283928A1
公开(公告)日：2017-10-05
申请号：US15513856
申请日：2014-09-30
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Tomonori KUNIEDA , Yoshitsugu TATSUZAWA , Kenichi MORI , Hideki FUJII
IPC分类号： C22F1/18 , B22D15/00 , B22D21/06
CPC分类号： C22F1/183 , B22D15/00 , B22D21/06 , B23K15/00 , C22F3/02
摘要： Provided is a titanium cast product for hot rolling made of commercial pure titanium or a titanium alloy, the titanium cast product including, in a surface serving as a rolling surface, a fine structure layer that is formed of an acicular structure formed in the outermost surface by melting and re-solidification treatment and that has a thickness of more than or equal to 5 mm and less than 9 mm in depth. In the titanium cast product for hot rolling according to the present invention, the surface is flat, the number of minute voids in the interior immediately below the surface is small, and the outermost surface has a significantly fine structure. When the titanium cast product is subjected to hot rolling, the occurrence of concavities on the surface in the early stage of hot rolling and the occurrence of surface defects on the hot rolled sheet can be stably prevented at a practical level.

7. 发明申请

US20170282231A1 TITANIUM CASTING PRODUCT FOR HOT ROLLING AND METHOD FOR PRODUCING THE SAME 审中-公开
公开(公告)号：US20170282231A1
公开(公告)日：2017-10-05
申请号：US15513904
申请日：2014-09-30
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Yoshitsugu TATSUZAWA , Tomonori KUNIEDA , Kenichi MORI , Hideki FUJII , Kazuhiro TAKAHASHI
IPC分类号： B21B1/02 , C22C1/02 , B32B15/01 , B21B3/00 , C22C14/00
CPC分类号： B21B1/02 , B21B1/22 , B21B3/00 , B21B2001/022 , B21B2001/028 , B21B2001/225 , B22D15/00 , B22D19/08 , B22D19/16 , B22D21/005 , B22D21/06 , B22D23/06 , B22D23/10 , B22D25/00 , B32B1/08 , B32B5/14 , B32B15/01 , B32B15/04 , B32B15/043 , B32B2311/18 , C22B9/16 , C22B9/20 , C22B9/223 , C22B9/225 , C22B9/226 , C22B9/228 , C22C1/02 , C22C1/0458 , C22C1/1036 , C22C14/00 , C22F1/183 , C23C6/00 , C23C10/28 , C23C10/30 , C23C10/60 , C23C20/00 , C23C20/02 , C23C20/04 , C23C20/06 , C23C24/106 , C23C30/00 , C23C30/005 , Y10T428/12458 , Y10T428/12806 , Y10T428/12812 , Y10T428/2495 , Y10T428/24967 , Y10T428/26
摘要： Provided is a titanium cast product made of commercially pure titanium, the titanium cast product being produced by electron-beam remelting or plasma arc melting, comprising: a melted and resolidified layer in a range of 1 mm or more in depth at a surface serving as a surface to be rolled, the melted and resolidified layer being obtained by adding one or more kinds of β stabilizer elements to the surface and melting and resolidifying the surface. An average value of β stabilizer element(s) concentration in a range of within 1 mm in depth is higher than β stabilizer element(s) concentration in a base material by, in mass %, equal to or more than 0.08 mass % and equal to or less than 1.50 mass %. As the material containing the β stabilizer element, powder, a chip, wire, or foil is used. As means for melting a surface layer, electron-beam heating and plasma arc heating are used.

8. 发明申请

US20160038983A1 TITANIUM CAST PRODUCT FOR HOT ROLLING AND METHOD FOR MANUFACTURING SAME 审中-公开
标题翻译：用于热轧的钛罐产品及其制造方法
公开(公告)号：US20160038983A1
公开(公告)日：2016-02-11
申请号：US14781498
申请日：2014-04-01
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Hideki FUJII , Tomonori KUNIEDA , Yoshitsugu TATSUZAWA , Kenichi MORI , Kazuhiro TAKAHASHI
IPC分类号： B21B1/22
CPC分类号： B21B1/22 , B21B2001/225 , C22C14/00 , C22F1/183
摘要： There is provided a titanium cast product for hot rolling composed of commercially pure titanium, the titanium cast product including: a microstructural refinement layer having acicular microstructure on an outermost layer of a surface layer to be rolled; and an inside microstructural refinement layer having acicular microstructure provided in an inside of the microstructural refinement layer. Cast solidification microstructure is present more inward than the inside microstructural refinement layer. The microstructural refinement layer has finer microstructure than the inside microstructural refinement layer. The microstructural refinement layer is present in a range of a depth of 1 mm or more and less than 6 mm from the surface. The inside microstructural refinement layer is present in an inside of the microstructural refinement layer in a range of a depth of 3 mm or more and 20 mm or less from the surface.
摘要翻译：提供了一种由商业纯钛组成的用于热轧的钛铸造产品，钛铸造产品包括：在待轧制的表面层的最外层上具有针状微观结构的微结构细化层; 以及在微结构细化层的内部提供针状微结构的内部微结构细化层。铸造凝固组织比内部微结构细化层更内向。微结构细化层具有比内部微结构细化层更微细的微结构。微结构细化层存在于与表面1mm以上且小于6mm的深度的范围内。内部微结构细化层在距离表面3mm以上且20mm以下的范围内存在于微结构细化层的内部。

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