# US 2017/0282250 A1 · Sintered sliding member having exceptional corrosion resistance, heat resistance, and wear resistance; and method for producing said member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282250 A1 - Document ID: US20170282250A1 - Status: Published application - Kind: A1 - Application number: 15/510,561 - Filed: 2015-09-10 - Published: 2017-10-05 - Earliest claimed: 2014-09-11 - Assignees: Diamet Corporation - Applicants: Diamet Corporation - Inventors: Shinichi TAKEZOE; Yoshinari ISHII - Web page: https://patentgrep.com/patent/US20170282250A1 ## CPC - B22F 5/106: {Tube or ring forms} - B22F 1/09: {Mixtures of metallic powders} - B22F 1/12: Metallic powder containing non-metallic particles (containing lubricating or binding agents or organic material B22F1/10) - B22F 3/11: Making porous workpieces or articles - B22F 3/16: in successive or repeated steps - C22C 1/0425: {Copper-based alloys} - C22C 1/0433: {Nickel- or cobalt-based alloys} - C22C 1/08: Alloys with open or closed pores - C22C 9/06: with nickel or cobalt as the next major constituent - C22C 19/002: {with copper as the next major constituent} - C22C 19/03: based on nickel - C22C 30/02: containing copper - C22C 30/04: containing tin or lead - F16C 33/128: {Porous bearings, e.g. bushes of sintered alloy} - F16C 33/145: {of sintered porous bearings} - B22F 2301/10: Copper - B22F 2301/15: Nickel or cobalt - B22F 2301/30: Low melting point metals, i.e. Zn, Pb, Sn, Cd, In, Ga - B22F 2302/40: Carbon, graphite - B22F 2998/10: Processes characterised by the sequence of their steps - F16C 2204/10: Alloys based on copper - F16C 2204/52: Alloys based on nickel, e.g. Inconel - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - C22C: ALLOYS (treatment of alloys C21D, C22F) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract A sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance is provided. The sintered sliding material has a composition made of: 36-86 mass % of Ni; 1-11 mass % of Sn; 0.05-1.0 mass % of P; 1-9 mass % of C; and the Cu balance including inevitable impurities. The sintered sliding material is made of a sintered material of a plurality of grains of alloy of Ni—Cu alloy or Cu—Ni alloy, the Ni—Cu alloy and the Cu—Ni alloy containing Sn, P, C, and Si; has a structure in which pores are dispersedly formed in grain boundaries of the plurality of the grains of alloy; and as inevitable impurities in a matrix constituted from the grains of alloy, a C content is 0.6 mass % or less and a Si content is 0.15 mass % or less. ## Claims ### Claim 1 A sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance comprising: 36-86 mass % of Ni; 1-11 mass % of Sn; 0.05-1.0 mass % of P; 1-9 mass % of C; and the Cu balance including inevitable impurities, wherein the sintered sliding material is made of a sintered material of a plurality of grains of alloy of Ni—Cu alloy or Cu—Ni alloy, the Ni—Cu alloy and the Cu—Ni alloy containing Sn, P, C, and Si, the sintered material has a structure in which pores are dispersedly formed in grain boundaries of the plurality of the grains of alloy, and as inevitable impurities in a matrix constituted from the grains of alloy, a C content is 0.6 mass % or less and a Si content is 0.15 mass % or less. ### Claim 2 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a Ni content in the sintered material is 40 mass % or more and 80 mass % or less. ### Claim 3 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a Ni content in the sintered material is 45 mass % or more and 70 mass % or less. ### Claim 4 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a Sn content in the sintered material is 3 mass % or more and 11 mass % or less. ### Claim 5 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a Sn content in the sintered material is 4 mass % or more and 10 mass % or less. ### Claim 6 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a P content in the sintered material is 0.1 mass % or more and 0.8 mass % or less. ### Claim 7 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a P content in the sintered material is 0.1 mass % or more and 0.6 mass % or less. ### Claim 8 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a C content in the sintered material is 2 mass % or more and 8 mass % or less. ### Claim 9 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a C content in the sintered material is 3 mass % or more and 8 mass % or less. ### Claim 10 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a porosity of the sintered material is 8-28%. ### Claim 11 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a porosity of the sintered material is 10-20%. ### Claim 12 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein a porosity of the sintered material is 12-18%. ### Claim 13 (depends on 1) The sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 1, wherein free graphite interposes in the grain boundaries of the sintered material. ### Claim 14 A method of producing a sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance, the method comprising the steps of: obtaining a mixed powder by mixing a plurality of powders containing one or more among Cu, Ni, Sn, P, and C in such a way that a total composition of the mixed powder becomes: 36-86 mass % of Ni; ; 1-11 mass % of Sn; 0.05-1.0 mass % of P; 1-9 mass % of C; and the Cu balance by using at least one of: a Cu—Ni alloy powder in which a C content is 0.6 mass % or less and a Si content is 0.15 mass % or less as inevitable impurities; and a Ni—Cu alloy powder in which a C content is 0.6 mass % or less and a Si content is 0.15 mass % or less as inevitable impurities; producing a green compact by pressing the mixed powder; and obtaining a sintered sliding material having a structure containing: an integrated matrix; and free graphite dispersed in a plurality of pores by sintering the green compact at 960-1140° C. so that a plurality of grains of alloy made of a Cu—Ni alloy or a Ni—Cu alloy disperse in the plurality of pores in the grain boundaries of the plurality of grains of alloy. ### Claim 15 (depends on 14) The method of producing a sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 14, wherein the mixed powder is obtained by mixing: at least one of a Cu—Ni alloy powder and a Ni—Cu alloy powder; a Sn powder; a Cu—P alloy powder; and C powder. ### Claim 16 (depends on 14) The method of producing a sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 14, wherein a porosity of the sintered material is 8-28%. ### Claim 17 (depends on 14) The method of producing a sintered sliding material with excellent corrosion resistance, heat resistance, and wear resistance according to claim 14, wherein as inevitable impurities in the matrix, a C content is 0.002 mass % to 0.6 mass %, and a Si content is 0.015 mass % to 0.15 mass %.