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1. 发明专利

BRPI0400016A 未知
公开(公告)号：BRPI0400016A
公开(公告)日：2004-12-28
申请号：BRPI0400016
申请日：2004-01-12
申请人： NIPPON PISTON RING CO LTD , HONDA MOTOR CO LTD
发明人： SATO KENICHI , KAKIUCHI ARATA , TAKAHASHI TERUO , ISHIDA MASAO , OKETANI HIROYUKI
IPC分类号： B22F1/00 , B21K1/24 , B22F3/035 , B22F5/00 , B22F7/00 , B22F7/06 , C22C38/00 , F01L3/02 , C22C38/08 , B22F3/16 , F01L3/00
摘要： A valve seat, press-fitted into a cylinder head of an internal combustion engine, containing an iron-based sintered alloy, includes a valve-seating section and a head-seating section. The valve-seating section and the head-seating section are monolithically formed by a sintering process and form a double layer structure. The valve-seating section includes a first iron-based sintered alloy member that has a porosity of 10 to 25 percent by volume and a sintered density of 6.1 to 7.1 g/cm 3 and contains hard particles dispersed in a matrix. The head-seating section includes a second iron-based sintered alloy member that has a porosity of 10 to 20 percent by volume and a sintered density of 6.4 to 7.1 g/cm 3 .

2. 发明专利

JPH0892706A VALVE SEAT FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0892706A
公开(公告)日：1996-04-09
申请号：JP25292094
申请日：1994-09-21
申请人： NIPPON PISTON RING CO LTD , HONDA MOTOR CO LTD
发明人： KAWAMURA OSAMU , KAKIUCHI ARATA , SATO TOSHIAKI , SATO KATSUAKI , TOMINAGA KATSUHIKO , SAKA TSUTOMU
IPC分类号： F01L3/02 , B22F3/26 , B22F5/00 , C22C33/02 , C22C38/00 , C22C38/10 , C22C38/44
摘要： PURPOSE: To produce a valve seat suitable for an internal combustion engine using a natural gas and the other gases as a fuel by specifying the compsn. of a sintered alloy and forming it into a high hardness allay having a mixed structure of a martensitic phase and a high alloy phase. CONSTITUTION: A sintering material having a compsn. contg., by weight, 0.3 to 0.9% C, 8.0 to 14% Ni and 3.0 to 7.0% Co or 0.4 to 0.7% C, 9.5 to 13.0% Ni and 4.0 to 6.0% Co, and the balance Fe and having a mixed structure of a martensitic phase and a high alloy phase is prepd. Preferably, this compsn. is furthermore incorporated with 0.001 to 3.0% Cr and 0.001 to 3.5% Mo. Thus, without executing hardening treatment, the hardness of the matrix can be increased (-to >=90 HRB) and the generation of a plastic flow and coagulating wear can be suppressed. If required, the alloy is added with

3. 发明专利

JPH06146823A VALVE SEAT FOR ENGINE 失效
公开(公告)号：JPH06146823A
公开(公告)日：1994-05-27
申请号：JP30127492
申请日：1992-11-11
申请人： HONDA MOTOR CO LTD , NIPPON PISTON RING CO LTD
发明人： SATO KATSUAKI , TOMINAGA KATSUHIKO , SAKA TSUTOMU , KAWAMURA OSAMU , TAKAHASHI TERUO , KAKIUCHI ARATA
IPC分类号： F01L3/02
摘要： PURPOSE:To provide an engine valve seat having a high strength and excellent wear and abrasion resistance. CONSTITUTION:An engine valve seat is a Fe base valve seat 5 pressed in an Al-alloy cylinder head 2 of an engine, and the metallographic structure of matrix is a multiphase structure having an austenite phase and a martensite phase, and at a seating part 14 where an exhaust valve 6 is seated, the existing quantity of the martensite phase is greater than that of the austenite phase, and on the other hand, at a pressing in part 15 pressed in the cylinder head 2, the existing quantity of the austenite phase is greater than that of the martensite phase.

4. 发明专利

JP2005248234A Iron-based sintered alloy for valve seat 有权
标题翻译：用于阀座的基于铁的烧结合金
公开(公告)号：JP2005248234A
公开(公告)日：2005-09-15
申请号：JP2004058958
申请日：2004-03-03
申请人： Honda Motor Co Ltd , Nippon Piston Ring Co Ltd , 日本ピストンリング株式会社 , 本田技研工業株式会社
发明人： SATO KENICHI , KAKIUCHI ARATA , TAKAHASHI TERUO , OKITA TOMOKI , TAKEHANA MASAHIRO
IPC分类号： F01L3/02 , B22F3/12 , B22F5/00 , C22C1/04 , C22C19/07 , C22C33/02 , C22C38/00 , C22C38/10 , C22C38/30 , C22C38/52 , C22C38/56
CPC分类号： F01L3/02 , C22C1/02 , C22C1/1084 , C22C19/07 , C22C33/0207 , C22C33/0278 , F01L2101/00 , F01L2103/00 , F01L2800/18 , F01L2820/01
摘要： PROBLEM TO BE SOLVED: To provide an iron-based sintered alloy for a valve seat, which has superior abrasion resistance and besides low aggressiveness to an opponent valve. SOLUTION: This iron-based sintered alloy has 10 to 20% by an area rate of first hard particles made of a Co-based intermetallic compound having particle diameters of 10 to 150 μm and a hardness of 500 HV to 800 HV (at the load of 0.1 kgf (hereafter the same)), and 15 to 35% by an area rate of second hard particles made of a Co-based intermetallic compound having a particle diameter of 10 to 150 μm and a hardness of 800 HV to 1,100 HV, dispersed in an amount of 25 to 55% by the total area rate in the matrix phase. The first hard particle preferably has a composition comprising, by mass%, 0.5-4.0% Si, 5.0-20.0% Cr, 20.0-40.0% Mo and the balance Co with unavoidable impurities; and the second hard particle preferably has a composition comprising, by mass%, 0.5-4.0% Si, 5.0-20.0% Ni, 15.0-35.0% Cr, 15.0-35.0% Mo and the balance Co with unavoidable impurities. The iron-based sintered alloy may disperse solid lubricant particles in addition to the hard particles in the matrix phase. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于阀座的铁基烧结合金，其具有优异的耐磨性以及对对阀的低侵蚀性。＆lt; P＆gt;解决方案：该铁基烧结合金的粒径为10〜150μm，硬度为500HV〜800HV的Co系金属间化合物的第1硬质粒子的面积率为10〜20％在0.1kgf（以下相同）的负载下）和15〜35％的由粒径为10〜150μm，硬度为800HV的Co系金属间化合物构成的第二硬质粒子的面积率 1100 HV，以基体相的总面积率分散25〜55％。第一硬质粒子优选具有按质量％计含有0.5-4.0％Si，5.0-20.0％Cr，20.0-40.0％Mo，余量Co含有不可避免的杂质的组合物; 并且第二硬质粒子优选具有以质量％计含有0.5-4.0％Si，5.0-20.0％Ni，15.0-35.0％Cr，15.0-35.0％Mo，余量为Co的不可避免的杂质。除了基质相中的硬质颗粒之外，铁基烧结合金还可以分散固体润滑剂颗粒。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2004232088A Valve seat made of iron-based sintered alloy, and production method therefor 有权
公开(公告)号：JP2004232088A
公开(公告)日：2004-08-19
申请号：JP2003412900
申请日：2003-12-11
申请人： Honda Motor Co Ltd , Nippon Piston Ring Co Ltd , 日本ピストンリング株式会社 , 本田技研工業株式会社
发明人： SATO KENICHI , KAKIUCHI ARATA , TAKAHASHI TERUO , ISHIDA MASAO , OKETANI HIROYUKI
IPC分类号： B22F1/00 , B21K1/24 , B22F3/035 , B22F5/00 , B22F7/00 , B22F7/06 , C22C38/00 , F01L3/02
CPC分类号： B22F5/008 , B21K1/24 , B22F7/06 , B22F2998/00 , F01L3/02 , F01L2101/00 , F01L2103/00 , Y10T29/49306
摘要： PROBLEM TO BE SOLVED: To provide an iron-based sintered alloy material for a valve seat which has excellent wear resistance. SOLUTION: The valve seat has a two layer structure in which a valve seat side part and a head seat side part are integrated. The valve seat side part consists of an iron-based sintered alloy material having a porosity of 10 to 25% by a volume ratio, and a density after sintering of 6.1 to 7.1 g/cm 3 , and in which hard particles of one or more kinds of elements selected from C, Cr, Mo, Co, Si, Ni, S and Fe are dispersed into a matrix phase. Further, the matrix part comprising a matrix phase and the hard particles preferably has a composition comprising one or more kinds of elements selected from Ni, Cr, Mo, Cu, Co, V, Mn, W, C, Si and S by 10.0 to 40.0% in total, and the balance substantially Fe. The head seat side part consists of an iron-based sintered alloy material having a porosity of 10 to 20% by a volume ratio and a density after sintering of 6.4 to 7.1 g/cm 3 . Thus, the production of iron oxide is promoted on the driving of an internal combustion engine to remarkably improve its wear resistance. COPYRIGHT: (C)2004,JPO&NCIPI

6. 发明专利

JP2003193173A METHOD OF PRODUCING WEAR RESISTANT IRON SINTERED ALLOY FOR VALVE SEAT 审中-公开
公开(公告)号：JP2003193173A
公开(公告)日：2003-07-09
申请号：JP2001399876
申请日：2001-12-28
申请人： NIPPON PISTON RING CO LTD , HONDA MOTOR CO LTD
发明人： TAKAHASHI TERUO , KAKIUCHI ARATA , SATO KENICHI , SATO KATSUAKI , TOMINAGA KATSUHIKO
IPC分类号： F01L3/02 , B22F3/26 , C22C33/02 , C22C38/00 , C22C38/52
摘要： PROBLEM TO BE SOLVED: To provide a method of producing an iron sintered alloy material which has excellent wear resistance, and is suitable for the valve seat of an internal combustion engine. SOLUTION: An iron powdery mixture obtained by mixing, by mass, 20 to 70% pure iron powder, and, as the other raw material powder, 10 to 50% alloy iron powder in which the total content of one or more kinds selected from Ni, Cr, Mo, Cu, Co, V, and Mn is ≤10.0%, 0.5 to 1.5% carbon powder, 5 to 20% fine carbide precipitated steel powder, and 5 to 40% hard grain powder consisting of two or more kinds of elements selected from C, Cr, Mo, Co, Si, Ni, S, and Fe, and having a hardness of 500 to 1,500 Hv, and grain sizes of -100 meshes is subjected to compacting. This compact is next sintered at 1,000 to 1,200°C. Further, 0.2 to 3.0 pts.wt. solid lubricant powder and/or 0.2 to 5.0 pts.wt. oxide stabilizing powder can be added to 100 pts.wt. of the iron powdery mixture. COPYRIGHT: (C)2003,JPO

7. 发明专利

JPH0559500A SECONDARY HARDENING TYPE HIGH TEMPERATURE WEAR RESISTANT SINTERED ALLOY 失效
公开(公告)号：JPH0559500A
公开(公告)日：1993-03-09
申请号：JP3016292
申请日：1992-01-21
申请人： HONDA MOTOR CO LTD , NIPPON PISTON RING CO LTD
发明人： SATO KATSUAKI , TOMINAGA KATSUHIKO , SAKA TSUTOMU , KAWAMURA OSAMU , TAKAHASHI TERUO , KAKIUCHI ARATA
IPC分类号： C22C33/02 , C22C38/00 , C22C38/54
摘要： PURPOSE:To provide secondary hardening type high temp. wear resistant sintered alloy excellent in wear resistance, heat resistance, strength and corrosion resistance as well as good in workability and suitable, e.g. for the valve seat forming material of an internal combustion engine. CONSTITUTION:This cover is a secondary hardening type high temp. wear resistant sintered alloy contg., by weight, 0.4 to 15% of at least one kind of metallic carbide forming elements selected from the group consisting of W, Mo, V, Ti, Nb, Ta and B, 5 to 35% of at least one kind of austenite forming elements selected from the group consisting of Ni, Co, Cu and Cr as well as 0.2 to 1.2% C and the balance at least Fe and having an austenitic phase capable of transforming into martensite.

8. 发明专利

GB2254337B Secondary hardening type high temperature wear-resistant sintered alloy. 未知
公开(公告)号：GB2254337B
公开(公告)日：1995-08-30
申请号：GB9203991
申请日：1992-02-25
申请人： NIPPON PISTON RING CO LTD
发明人： SATO KATSUAKI , TOMINAGA KATSUHIKO , SAKA TSUTOMU , KAWAMURA OSAMU , TAKAHASHI TERUO , KAKIUCHI ARATA
IPC分类号： C22C33/02 , C22C38/00 , C22C38/54
摘要： A secondary hardening type high temperature wear-resistant sintered alloy body comprising 0.4 to 15 wt. % of at least one species of metal carbide forming element which is selected from the group consisting of W, Mo, V, Ti, Nb, Ta and B; 5 to 35 wt. % of at least one species of austenite forming element which is selected from the group consisting of Ni, Co, Cu, and Cr; 0.2 to 1.2 wt. % of C; and 0.04 to 0.2 wt. % of Al consisting essentially the remainder of Fe, wherein the alloy body contains an austenite phase which is capable of martensitic transformation.

9. 发明专利

DE19723392C2 未知
公开(公告)号：DE19723392C2
公开(公告)日：2001-06-28
申请号：DE19723392
申请日：1997-06-04
申请人： NIPPON PISTON RING CO LTD
发明人： KAWAMURA OSAMU , TAKAHASHI TERUO , KAKIUCHI ARATA
IPC分类号： F01L3/02 , C22C38/00 , C22C38/16 , F01L3/22
摘要： The invention is directed to a joined type valve seat which is joined into the cylinder head of an aluminum alloy in an internal combustion engine by resistance welding and, in particular, to an improved joined type valve seat superior in strength, rigidity, and abrasion resistance, whereby no cracks are caused when running the engine or when joining the valve seat to the engine block by resistance welding. The valve seat is made of a material having a tensile strength of 300 MPa or above, a radial crushing strength of 500 MPa or above, an elongation of 0.6% or more, a thermal conductivity of 15 W/(mxK) or above, a coefficient of thermal expansion of 10x10-6 (1/K) or above, and an electric resistivity of 50 mu OMEGA xcm or below.

10. 发明专利

DE19721406A1 未知
公开(公告)号：DE19721406A1
公开(公告)日：1997-12-04
申请号：DE19721406
申请日：1997-05-22
申请人： NIPPON PISTON RING CO LTD
发明人： KAWAMURA OSAMU , TAKAHASHI TERUO , KAKIUCHI ARATA
IPC分类号： F01L3/02 , F01L3/04 , F01L3/22 , F02F1/24
摘要： A joined type valve seat has a coating layer of thickness of 10~m or less. The layer has a coefficient of thermal expansion of an intermediate value between the valve seat material and the cylinder head material. The surfaces of the valve seat contacting with the cylinder head are coated. Where the valve seat is made of Fe-base sintered alloy, the layer will have a coefficient of thermal expansion of 15 x 10 -6 - 25 x 10 -6 (1/K). Where the valve seat is made of Cu-base alloy, the layer will have a coefficient of thermal expansion of 18 x 10 -6 - 27 x 10 -6 (1/K). Where the seat is made of ceramics the layer will have a coefficient of thermal expansion of 10 x 10 -6 - 20 x 10 -6 (1/K). The coating will be a pure metal or alloy layer (e.g. Cu, Ag, Ni). The seat is joined to the cylinder head by welding. The cylinder head is preferably aluminium alloy.

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