| 摘要 |
PURPOSE:To manufacture a sliding member of sintered alloy having superior wear resistance and strength, by infiltrating lead into the sliding part requiring wear resistance and by infiltrating copper into the matrix part requiring strength, respectively, of a sintered alloy. CONSTITUTION:Lead grains 6 are placed on a graphite tray 7, a ring 4 of sintered body is put upon the lead grains 6 with its sliding part undermost, upon which a copper powder-molded substance 5 is placed. Succeedingly, the above material is heated in an atmosphere of AX gas to infiltrate lead and copper, respectively. In this way, a valve sheet ring which has a sliding surface 1 having a lead-infiltrated part 2 at the sliding part requiring wear resistance and having a copper-infiltrated part 3 at the matrix part requiring strength can be obtained.
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