Wear-resistant copper-base alloy

Abstract

This invention provides a wear-resistant copper-base alloy, which can not only enhance wear resistance in a high temperature range but also enhance crack resistance and machinability and which is especially suitable for forming a weld bead layer. The wear-resistant copper-base alloy is composed, by weight, of 5.0 to 20.0% nickel, 0.5 to 5.0% silicon, 3.0 to 20.0% iron, 1.0 to 15.0% chromium, 0.01 to 2.00% cobalt, 3.0 to 20.0% by weight one or more of molybdenum, tungsten and vanadium, and the balance of copper with inevitable impurities. It is preferable to contain 0.01 to 5.0% niobium carbide.

1 . A wear-resistant copper-base alloy, comprising, by weight, of 5.0 to 20.0% nickel, 0.5 to 5.0% silicon, 3.0 to 20.0% iron, 1.0 to 15.0% chromium, 0.01 to 2.00% cobalt, 3.0 to 20.0% one or more of molybdenum, tungsten and vanadium, and the balance of copper with inevitable impurities.  
     
     
         2 . A wear-resistant copper-base alloy, comprising, by weight, of 5.0 to 20.0% nickel, 0.5 to 5.0% silicon, 3.0 to 20.0% iron, 1.0 to 15.0% chromium, 0.01 to 2.00% cobalt, 3.0 to 20.0% one or more of molybdenum, tungsten and vanadium, 0.01 to 5.0% niobium carbide and the balance of copper with inevitable impurities.  
     
     
         3 . A wear-resistant copper-base alloy according to  claim 1  or  claim 2 , wherein silicide is dispersed therein.  
     
     
         4 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 3 , wherein silicide composed principally of one or more of Fe—Mo, Fe—W and Fe—V is dispersed therein.  
     
     
         5 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 4 , further comprising a matrix and hard particles dispersed in said matrix, wherein said hard particles are mainly composed of silicide composed principally of one or more of Fe—Mo, Fe—W and Fe—V, and a Ni—Fe—Cr based solid solution, and said matrix is mainly composed of a Cu—Ni based solid solution, and silicide composed principally of nickel.  
     
     
         6 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 4 , further comprising a matrix and hard particles dispersed in said matrix, wherein said hard particles are mainly composed of silicide composed principally of Fe—Mo, and a Ni—Co—Fe—Cr based solid solution.  
     
     
         7 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 6 , wherein cobalt is contained in the range from 0.01 to 1.94%.  
     
     
         8 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 7 , wherein the content of (Fe+Mo) is set in the range from 10 to 35% by weight.  
     
     
         9 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 8 , wherein the content of (Fe+Mo) is set in the range from 10 to 35% by weight and the content of (Ni+Fe) is set in the range from 10 to 35% by weight.  
     
     
         10 . A wear-resistant copper-base alloy according to one of  claim 5  to  claim 9 , wherein said matrix has an average hardness of Hv 130 to 250, and said hard particles have an average hardness of about Hv 250 to 700, which is higher than that of said matrix.  
     
     
         11 . A wear-resistant copper-base alloy according to one of  claim 5  to  claim 10 , wherein said hard particles are contained by 10 to 60% by volume when said wear-resistant copper-base alloy is assumed as 100%.  
     
     
         12 . A wear-resistant copper-base alloy according to one of  claim 5  to  claim 11 , wherein said hard particles have an average particle diameter of 20 to 3000 cm.  
     
     
         13 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 12 , which is used for cladding.  
     
     
         14 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 13 , which is used for cladding by being melt by a high-density energy beam and then cooled.  
     
     
         15 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 14 , which constitutes a weld bead layer.  
     
     
         16 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 15 , which is used for a sliding member.  
     
     
         17 . A wear-resistant copper-base alloy according to one of  claim 1  to  claim 16 , which is used for a valve train member for an internal combustion engine.