Abrasion resistant sintered copper base cu-ni-sn alloy and bearing made from the same

Abstract

A Cu—Ni—Sn copper-based sintered alloy has a composition including 10 to 40% by mass of Ni, 5 to 25% by mass of Si, and the remainder containing Cu and inevitable impurities, and if necessary, 0.1 to 0.9% by mass of P, 1 to 10% by mass of C, 0.3 to 6% by mass of calcium fluoride or 0.3 to 6% by mass of molybdenum disulfide. In the structure of the alloy, a phase of a composition containing Cu (4-x-y) Ni x Sn y (where x: 1.7 to 2.3, y: 0.2 to 1.3) is dispersed.

1 . A Cu—Ni—Sn copper-based sintered alloy comprising a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3) is dispersed in a matrix of the Cu—Ni—Sn copper-based sintered alloy containing Ni, Sn, and Cu. 
     
     
         2 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3) is dispersed in a matrix. 
     
     
         3 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.1 to 0.9% by mass of P and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3) and a phase of a composition containing Cu (4-z) P z  (where z: 0.7 to 1.3) are dispersed in a matrix. 
     
     
         4 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 1 to 10% by mass of C and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3) and a graphite phase are dispersed in a matrix. 
     
     
         5 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.1 to 0.9% by mass of P, 1 to 10% by mass of C and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a phase of a composition containing Cu (4-z) P z  (where z: 0.7 to 1.3) and a graphite phase are dispersed in a matrix. 
     
     
         6 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.3 to 6% by mass of calcium fluoride and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3) and a calcium fluoride phase are dispersed in a matrix. 
     
     
         7 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.1 to 0.9% by mass of P, 0.3 to 6% by mass of calcium fluoride and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a phase of a composition containing Cu (4-z) P z  (where z: 0.7 to 1.3) and a calcium fluoride phase are dispersed in a matrix. 
     
     
         8 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 1 to 10% by mass of C, 0.3 to 6% by mass of calcium fluoride and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a graphite phase and a calcium fluoride phase are dispersed in a matrix. 
     
     
         9 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.1 to 0.9% by mass of P, 1 to 10% by mass of C, 0.3 to 6% by mass of calcium fluoride and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a phase of a composition containing Cu (4-z) P z  (where z: 0.7 to 1.3), a graphite phase and a calcium fluoride phase are dispersed in a matrix. 
     
     
         10 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.3 to 6% by mass of molybdenum disulfide and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3) and a molybdenum disulfide phase are dispersed in a matrix. 
     
     
         11 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.1 to 0.9% by mass of P, 0.3 to 6% by mass of molybdenum disulfide and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a phase of a composition containing Cu (4-z) P z  (where z: 0.7 to 1.3) and a molybdenum disulfide phase are dispersed in a matrix. 
     
     
         12 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 1 to 10% by mass of C, 0.3 to 6% by mass of molybdenum disulfide and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a graphite phase and a molybdenum disulfide phase are dispersed in a matrix. 
     
     
         13 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.1 to 0.9% by mass of P, 1 to 10% by mass of C, 0.3 to 6% by mass of molybdenum disulfide and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a phase of a composition containing Cu (4-z) P z  (where z: 0.7 to 1.3), a graphite phase and a molybdenum disulfide phase are dispersed in a matrix. 
     
     
         14 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.3 to 6% by mass of calcium fluoride, 0.3 to 6% by mass of molybdenum disulfide and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a calcium fluoride phase and a molybdenum disulfide phase are dispersed in a matrix. 
     
     
         15 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.1 to 0.9% by mass of P, 0.3 to 6% by mass of calcium fluoride, 0.3 to 6% by mass of molybdenum disulfide and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a phase of a composition containing Cu (4-z) P z  (where z: 0.7 to 1.3), a calcium fluoride phase and a molybdenum disulfide phase are dispersed in a matrix. 
     
     
         16 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 1 to 10% by mass of C, 0.3 to 6% by mass of calcium fluoride, 0.3 to 6% by mass of molybdenum disulfide and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a graphite phase, a calcium fluoride phase and a molybdenum disulfide phase are dispersed in a matrix. 
     
     
         17 . A Cu—Ni—Sn copper-based sintered alloy comprising a composition containing 10 to 40% by mass of Ni, 5 to 25% by mass of Sn, 0.1 to 0.9% by mass of P, 1 to 10% by mass of C, 0.3 to 6% by mass of calcium fluoride, 0.3 to 6% by mass of molybdenum disulfide and the remainder containing Cu and inevitable impurities, and having a structure in which a phase of a composition containing Cu (4-x-y) Ni x Sn y  (where x: 1.7 to 2.3, y: 0.2 to 1.3), a phase of a composition containing Cu (4-z) P z  (where z: 0.7 to 1.3), a graphite phase, a calcium fluoride phase and a molybdenum disulfide phase are dispersed in a matrix. 
     
     
         18 . A bearing which is made of the Cu—Ni—Sn copper-based sintered alloy according to  claim 1 .