公开(公告)号：US4485147A

公开(公告)日：1984-11-27

申请号：US528523

申请日：1983-09-01

申请人： Yoshio Nishino ,  Seiichi Kirigaya

发明人： Yoshio Nishino ,  Seiichi Kirigaya

IPC分类号： C22C38/00 ,  C22C33/02 ,  F01L3/04 ,  F02B1/04 ,  B22F3/10 ,  B32B5/18

CPC分类号： F01L3/04 ,  C22C33/0207 ,  C22C33/0242 ,  F02B1/04 ,  Y10T428/12042 ,  Y10T428/1216

摘要： A process for producing a Cu-infiltrated sintered Fe-base material without requiring a separate Cu infiltration step is disclosed. The process comprises the steps of preparing two powder mixes, one having a predetermined composition with a powder of infiltrating material containing Cu powder or Cu alloy powder as the primary component, and the other having a predetermined composition without said powder of infiltrating material; pressing the two powder mixes into a compact having said powder of infiltrating material present locally; and sintering the compact under ordinary conditions so as to cause the infiltrant to penetrate into the infiltrant-free area simultaneously with the sintering.Also disclosed is a two-layer valve seat produced by this process. One layer of the valve seat accounts for the principal part of the seat and is made of an Fe-base sintered material containing Cu or Cu alloy as an infiltrant, and the other layer provides a layer to contact the valve and is infiltrated with Cu through pores during the sintering.

摘要翻译： 公开了一种不需要单独的Cu渗透步骤来生产Cu-渗透的烧结Fe基材料的方法。 该方法包括以下步骤：制备两种粉末混合物，一种具有预定组成的粉末混合物，其中含有Cu粉末或Cu合金粉末作为主要组分的渗透材料粉末，另一种具有预定组成，而没有所述渗透材料粉末; 将两种粉末混合物压制成具有局部存在的所述渗透材料粉末的压块; 并在常规条件下烧结该压块，以使该浸渗剂与烧结同时渗透到无渗透区域。 还公开了通过该方法制造的两层阀座。 阀座的一层是座椅的主要部分，由含有Cu或Cu合金作为渗透剂的Fe基烧结材料制成，另一层提供了一个接触阀门的层，并渗入Cu 烧结过程中的孔隙。