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公开(公告)号：EP0785288A1
公开(公告)日：1997-07-23
申请号：EP97300004.5
申请日：1997-01-02
发明人： Aonuma, Koichi , Aoki,Yoshimasa , Hayashi,Koichiro
IPC分类号： C22C33/02
CPC分类号： F01L3/22 , C22C33/0257 , F02F7/0085
摘要： The present invention provides a valve seat having a suitable degree of wear resistance, which can be produced without recourse to expensive elements represented by cobalt and at a cost lower than ever before. This valve seat is formed of a wear-resistant sintered alloy having a general composition consisting essentially of, in weight ratio, 0.736 to 5.79% of nickel, 0.12 to 6.25% of chromium, 0.294 to 0.965% of molybdenum, and 0.508 to 2.0% of carbon with the balance being iron, and inevitable impurities, and having a micro structure wherein a bainite matrix structure or a mixed bainite and sorbite matrix structure includes a nucleus having a hard phase composed mainly of chromium carbide, and a ferrite surrounding said nucleus and having a high chromium concentration and a martensite surrounding said ferrite are dispersed.
摘要翻译： 本发明提供了一种具有适当程度的耐磨性的阀座，其可以在不用以钴代替的昂贵元件的情况下生产，并且成本比以往低。 该阀座由耐磨烧结合金形成，该耐磨烧结合金的总体组成主要由重量比为0.736至5.79％的镍，0.12至6.25％的铬，0.294至0.965％的钼和0.508至2.0％ 的碳，余量为铁和不可避免的杂质，并且具有微观结构，其中贝氏体基体结构或混合贝氏体和索氏体基体结构包括具有主要由碳化铬组成的硬相的核和围绕所述核的铁素体， 具有高铬浓度和围绕所述铁素体的马氏体分散。
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公开(公告)号：EP0789088B1
公开(公告)日：2001-08-29
申请号：EP97300005.2
申请日：1997-01-02
IPC分类号： C22C33/02
CPC分类号： C22C33/0207 , C22C33/0257
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公开(公告)号：EP0785288B1
公开(公告)日：2001-08-29
申请号：EP97300004.5
申请日：1997-01-02
发明人： Aonuma, Koichi , Aoki,Yoshimasa , Hayashi,Koichiro
IPC分类号： C22C33/02
CPC分类号： F01L3/22 , C22C33/0257 , F02F7/0085
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公开(公告)号：EP0789088A1
公开(公告)日：1997-08-13
申请号：EP97300005.2
申请日：1997-01-02
IPC分类号： C22C33/02
CPC分类号： C22C33/0207 , C22C33/0257
摘要： The invention provides a valve seat having a suitable degree of wear resistance, which can be produced without recourse to expensive elements represented by cobalt and at a cost lower than ever before. This valve seat is formed of a wear-resistant sintered alloy having a general composition consisting essentially of, in weight ratio, 0.736 to 9.65% of nickel, 0.736 to 2.895% of copper, 0.294 to 0.965% of molybdenum, 0.12 to 6.25% of chromium, and 0.508 to 2.0% of carbon with the balance being iron, and inevitable impurities, and having a metallic structure in which there are dispersed (1) a martensite, (2) a bainite having a nucleus of sorbite and/or upper bainite and surrounding said nucleus, (3) an austenite having a high nickel concentration, and (4) a hard phase surrounding with a ferrite having a high chromium concentration and composed mainly of a chromium carbide.
摘要翻译： 本发明提供了一种具有合适的耐磨度的阀座，其可以不依靠以钴为代表的昂贵元件而以比以往更低的成本生产。 该阀座由耐磨性烧结合金形成，其具有的一般组成基本上由重量比为：镍为0.736至9.65％，铜为0.736至2.895％，钼为0.294至0.965％，钼为0.12至6.25％， 铬和0.508-2.0％的碳，其余为铁和不可避免的杂质，并且具有其中分散有（1）马氏体的金属结构，（2）具有索氏体和/或上贝氏体的核的贝氏体 （3）具有高镍浓度的奥氏体，和（4）围绕着具有高铬浓度并主要由碳化铬组成的铁素体的硬质相。
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