Sliding material

Abstract

Disclosed is a sliding material containing 0.5 to 15 mass % of Sn, 0.2 to 10 mass % of Ni, 0.4 to 10 volume % of hard particles, and the balance being essentially Cu. The hard particles are of one or more selected from the group consisting of WC, W 2 C, Mo 2 C, W, and Mo. A grain size of the Cu—Sn—Ni matrix is set to be not more than 0.070 mm.

What is claimed is:  
     
         1 . A sliding material comprising 0.5 to 15 mass % of Sn, 0.2 to 10 mass % of Ni, 0.4 to 10 volume % of hard particles, and the balance being essentially Cu, wherein the hard particles are one or more selected from the group of WC, W 2 C, Mo 2 C, W and Mo, and wherein a grain size of the matrix of the sliding material is not larger than 0.070 mm, the matrix being of a Cu—Sn—Ni alloy.  
     
     
         2 . A sliding material according to  claim 1 , wherein: 
 when the hard particles are of WC, W 2 C or Mo 2 C, an average particle size thereof is 0.1 to 10 μm, and    when the hard particles are of W or Mo, an average particle size thereof is 1 to 25 μm.    
     
     
         3 . A sliding material according to  claim 1 , which further comprises 40 mass % in total of one or more selected from the group of Fe, Al, Mn, Co, Zn, Si and P.  
     
     
         4 . A sliding material according to  claim 2 , which further comprises 40 mass % in total of one or more selected from the group of Fe, Al, Mn, Co, Zn, Si and P.  
     
     
         5 . A sliding material according to  claim 1 , which further comprises not more than 10 volume % in total of one or more selected from the group of MoS 2 , WS 2 , h-BN and graphite.  
     
     
         6 . A sliding material according to  claim 2 , which further comprises not more than 10 volume % in total of one or more selected from the group of MoS 2 , WS 2 , h-BN and graphite.  
     
     
         7 . A sliding material according to  claim 3 , which further comprises not more than 10 volume % in total of one or more selected from the group of MoS 2 , WS 2 , h-BN and graphite.  
     
     
         8 . A sliding material according to  claim 4 , which further comprises not more than 10 volume % in total of one or more selected from the group of MoS 2 , WS 2 , h-BN and graphite.  
     
     
         9 . A sliding material according to  claim 1 , which further comprises not more than 10 mass % in total of Bi and/or Pb.  
     
     
         10 . A sliding material according to  claim 2 , which further comprises not more than 10 mass % in total of Bi and/or Pb.  
     
     
         11 . A sliding material according to  claim 3 , which further comprises not more than 10 mass % in total of Bi and/or Pb.  
     
     
         12 . A sliding material according to  claim 4 , which further comprises not more than 10 mass % in total of Bi and/or Pb.  
     
     
         13 . A sliding material according to  claim 5 , which further comprises not more than 10 mass % in total of Bi and/or Pb.  
     
     
         14 . A sliding material according to  claim 6 , which further comprises not more than 10 mass % in total of Bi and/or Pb.  
     
     
         15 . A sliding material according to  claim 7 , which further comprises not more than 10 mass % in total of Bi and/or Pb.  
     
     
         16 . A sliding material according to  claim 8 , which further comprises not more than 10 mass % in total of Bi and/or Pb.