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    VALVE SEAT
    1.
    发明公开
    VALVE SEAT 审中-公开
    阀座

    公开(公告)号：EP2787183A1

    公开(公告)日：2014-10-08

    申请号：EP12854384.0

    申请日：2012-06-14

    申请人： TPR Co., Ltd.

    发明人： KOYAMA Yoshio ,  HANADA Fusanobu ,  HARA Shohtaroh

    IPC分类号： F01L3/02 ,  B22F5/00

    摘要： Provided is a valve seat having excellent strength and wear resistance. In a valve seat using an iron-based sintered alloy, an oxide mainly composed of triiron tetroxide is formed by oxidation treatment on the surface and interior of the iron-based sintered alloy, and the average area ratio of the oxide mainly composed of triiron tetroxide in a cross section of the iron-based sintered alloy in the state prior to installation on a cylinder head is 5 to 20%. Preferably, the iron-based sintered alloy contains hard particles formed from at least one compound of carbides, silicides, nitrides, borides, and intermetallic compounds containing one or more elements selected from groups 4a to 6a of the periodic table, and the average area ratio of the hard particles in the cross section of the iron-based sintered alloy in the state prior to installation on a cylinder head is 5 to 45%.

    摘要翻译： 提供一种具有优异的强度和耐磨性的阀座。 在使用铁基烧结合金的阀座中，通过氧化处理在铁基烧结合金的表面和内部形成主要由四氧化三铁组成的氧化物，并且主要由四氧化三铁组成的氧化物的平均面积比 在安装在气缸盖上之前的状态下的铁基烧结合金的横截面为5至20％。 优选地，铁基烧结合金包含由碳化物，硅化物，氮化物，硼化物和金属间化合物中的至少一种化合物形成的硬质颗粒，所述金属间化合物包含选自元素周期表第4a至6a族的一种或多种元素，并且平均面积比 在安装于气缸盖之前的状态下的铁基烧结合金的截面中的硬质颗粒的比例为5％至45％。

    VALVE SEAT
    4.
    发明公开
    VALVE SEAT 审中-公开
    阀座

    公开(公告)号：EP2982836A1

    公开(公告)日：2016-02-10

    申请号：EP13892953.4

    申请日：2013-09-05

    申请人： TPR Co., Ltd.

    发明人： KOYAMA Yoshio ,  HARA Shohtaroh

    IPC分类号： F01L3/02

    CPC分类号： F01L3/02 ,  B22F1/0059 ,  B22F5/008 ,  B22F2301/15 ,  B22F2301/35 ,  B22F2302/10 ,  B22F2302/25 ,  C21D6/007 ,  C21D9/0068 ,  C22C1/1078 ,  C22C30/00 ,  C22C32/001 ,  C22C33/02 ,  C22C33/0207 ,  C22C33/0257 ,  C22C33/0285 ,  C22C38/02 ,  C22C38/10 ,  C22C38/52 ,  C22C38/58 ,  C23C8/10 ,  C23C8/14 ,  F01L2101/00 ,  F01L2101/02 ,  F01L2103/00 ,  F01L2820/01 ,  F16K25/005

    摘要： Provided is a valve seat excellent in radial crushing strength and wear resistance. The valve seat includes an iron-based sintered alloy subjected to oxidation treatment, which is obtained by subjecting an iron-based sintered alloy including: 4 mass% to 15 mass% of Co particles; and hard particles each containing at least one compound of an intermetallic compound, a carbide, a silicide, a nitride, or a boride that has one or more kinds of elements selected from group 4a to 6a elements in a periodic table, and having a hardness of from 600 HV to 1,600 HV to oxidation treatment, and which has an oxide mainly including triiron tetraoxide (Fe 3 O 4 ) and cobalt oxide (CoO) formed on a surface and in an interior of the iron-based sintered alloy. The iron-based sintered alloy subjected to oxidation treatment has an area ratio of the oxide of from 5% to 25% in a cross section thereof in a state prior to installation on the cylinder head.

    摘要翻译： 本发明提供径向抗压强度和耐磨损性优异的阀座。 所述阀座包括通过对包含以下组分的铁基烧结合金进行氧化处理的铁基烧结合金：4质量％至15质量％的Co颗粒; 和含有至少一种金属间化合物，碳化物，硅化物，氮化物或硼化物的化合物的硬质颗粒，所述金属间化合物，碳化物，硅化物，氮化物或硼化物具有选自元素周期表第4a族至第6a族元素中的一种或多种元素， 为600HV〜1600HV，进行氧化处理，在铁系烧结合金的表面和内部形成以氧化物为主成分的四氧化二铁（Fe 3 O 4）和氧化钴（CoO）。 经过氧化处理的铁基烧结合金在安装在气缸盖上之前的状态下的横截面中的氧化物的面积比为5％至25％。