# US 2021/0277944 A1 · Sintered bearing bush material, sliding bearing, internal combustion engine and electric motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277944 A1 - Document ID: US20210277944A1 - Status: Published application - Kind: A1 - Application number: 17/191,672 - Filed: 2021-03-03 - Published: 2021-09-09 - Earliest claimed: 2020-03-04 - Assignees: Mahle International GmbH - Applicants: Mahle International GmbH - Inventors: Andreas Gutmann; Lilia Kurmanaeva; Patrick Sutter; Klaus Wintrich - Web page: https://patentgrep.com/patent/US20210277944A1 ## CPC - F16C 33/121: {Use of special materials} - C22C 19/058: {without Mo and W} - C22C 33/0242: {using the impregnating technique} - C22C 38/001: {containing N} - C22C 38/008: {containing tin} - C22C 38/02: containing silicon - C22C 38/12: containing tungsten, tantalum, molybdenum, vanadium, or niobium - C22C 38/16: containing copper - C22C 38/18: containing chromium - C22C 38/58: with more than 1.5% by weight of manganese - F16C 33/104: {in a porous body, e.g. oil impregnated sintered sleeve} - F16C 33/128: {Porous bearings, e.g. bushes of sintered alloy} - F16C 33/14: Special methods of manufacture; Running-in - F16C 33/145: {of sintered porous bearings} - C22C 2200/00: Crystalline structure - F16C 2202/10: Porosity - F16C 2202/54: Molybdenum disulfide - F16C 2204/52: Alloys based on nickel, e.g. Inconel - F16C 2204/64: Medium carbon steel, i.e. carbon content from 0.4 to 0,8 wt% - F16C 2204/66: High carbon steel, i.e. carbon content above 0.8 wt%, e.g. through-hardenable steel - F16C 2204/72: with nickel as further constituent, e.g. stainless steel - F16C 2360/22: Internal combustion engines - F16C 2380/26: Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - C22C: ALLOYS (treatment of alloys C21D, C22F) ## Abstract A sintered bearing bush material for a sliding bearing may include: 0.5 to 1.7 percentage by weight carbon; 0.2 to 1.2 percentage by weight manganese; 0.2 to 1.2 percentage by weight sulphur; 1.2 to 2.4 percentage by weight nickel; 1.0 to 2.1 percentage by weight molybdenum; 3.0 to 7.0 percentage by weight copper; 0.2 to 1.2 percentage by weight tin; 0 to 0.8 percentage by weight phosphorus; and a residual component. ## Claims ### Claim 1 A sintered bearing bush material for a sliding bearing, comprising: 0.5 to 1.7 percentage by weight carbon; 0.2 to 1.2 percentage by weight manganese; 0.2 to 1.2 percentage by weight sulphur; 1.2 to 2.4 percentage by weight nickel; 1.0 to 2.1 percentage by weight molybdenum; 3.0 to 7.0 percentage by weight copper; 0.2 to 1.2 percentage by weight tin; 0 to 0.8 percentage by weight phosphorus; and a residual component. ### Claim 2 (depends on 1) The sintered bearing bush material according to claim 1, wherein the residual component comprises a maximum of 0.2 percentage by weight impurities. ### Claim 3 (depends on 1) The sintered bearing bush material according to claim 1, wherein the residual component contains 83.4 percentage by weight to 94.9 percentage by weight iron. ### Claim 4 (depends on 1) The sintered bearing bush material according to claim 1, wherein the residual component consists of iron and impurities. ### Claim 5 (depends on 1) The sintered bearing bush material according to claim 1, wherein the remaining weight proportion of the residual component of the bearing bush material is formed by iron. ### Claim 6 (depends on 1) The sintered bearing bush material according to claim 1, wherein at least one of: the bearing bush material is produced from a powder mixture with at least three powder components and a pressing adjuvant, wherein one of the at least three powder components is a sulphidic solid lubricant; and the bearing bush material is produced by means of sintering of a green body, which has been formed via uniaxial pressing of the powder mixture. ### Claim 7 (depends on 1) The sintered bearing bush material according to claim 1, wherein the bearing bush material is sintered at a temperature of 1050° Celsius to 1150° Celsius and in a sinter atmosphere which comprises a mixture of hydrogen and nitrogen or which comprises an endogas. ### Claim 8 (depends on 1) The sintered bearing bush material according to claim 1, wherein the sintered bearing bush material has a structure with an at least 70 percent proportion of martensitic and bainitic structure components. ### Claim 9 (depends on 1) The sintered bearing bush material according to claim 1, wherein at least one of: the bearing bush material has a residual porosity of at least 8 percent; the bearing bush material has a density of 6.2 to 6.9 g/cm3; and a volume of the residual porosity is filled to at least 30 percent with an oil. ### Claim 10 (depends on 9) The sintered bearing bush material according to claim 9, wherein the oil is introduced into the residual porosity in an impregnating process at a pressure of 1 mbar to 1013.25 mbar and at an oil temperature of 40° Celsius to 110° Celsius, in particular 62° Celsius to 98° Celsius. ### Claim 11 A sliding bearing comprising: a shaft, which has a shaft material; and a bearing bush, which has a sintered bearing bush material including: 0.5 to 1.7 percentage by weight carbon; 0.2 to 1.2 percentage by weight manganese; 0.2 to 1.2 percentage by weight sulphur; 1.2 to 2.4 percentage by weight nickel; 1.0 to 2.1 percentage by weight molybdenum; 3.0 to 7.0 percentage by weight copper; 0.2 to 1.2 percentage by weight tin; 0 to 0.8 percentage by weight phosphorus; and a residual component wherein the shaft is guided in the bearing bush in a sliding manner and movably relative to the bearing bush. ### Claim 12 (depends on 11) The sliding bearing according to claim 11, wherein the shaft material includes: 0.4 to 0.5 percentage by weight carbon; 2.7 to 3.3 percentage by weight silicon; 0 to 0.6 percentage by weight manganese; 8 to 10 percentage by weight chromium; 0 to 0.5 percentage by weight nickel; 0 to 0.04 percentage by weight phosphorus; 0 to 0.03 percentage by weight sulphur; and residual component iron and production-related impurities. ### Claim 13 (depends on 11) The sliding bearing according to claim 11, wherein the shaft material includes: 0.45 to 0.55 percentage by weight carbon; 0 to 0.45 percentage by weight silicon; 8 to 10 percentage by weight manganese; 20 to 22 percentage by weight chromium; 3.5 to 5.5 percentage by weight nickel; 0 to 0.04 percentage by weight phosphorus; 0 to 0.03 percentage by weight sulphur; 0.4 to 0.6 percentage by weight nitrogen; 1.8 to 2.5 percentage by weight niobium; 0.8 to 1.5 percentage by weight tungsten; and residual component iron and production-related impurities. ### Claim 14 (depends on 11) The sliding bearing according to claim 11, wherein the shaft material includes: 0 to 0.08 percentage by weight carbon; 0 to 0.5 percentage by weight silicon; 0 to 0.5 percentage by weight manganese; 13.5 to 15.5 percentage by weight chromium; 30 to 33.5 percentage by weight nickel; 0 to 0.015 percentage by weight phosphorus; 0 to 0.01 percentage by weight sulphur; 1.6 to 2.2 percentage by weight aluminium; 0.4 to 0.9 percentage by weight niobium; 2.3 to 2.9 percentage by weight titanium; 0.4 to 1.0 percentage by weight molybdenum; and residual component iron and production-related impurities. ### Claim 15 (depends on 11) The sliding bearing according to claim 11, wherein the shaft material includes: 0 to 0.13 percentage by weight carbon; 0 to 1 percentage by weight silicon; 0 to 1 percentage by weight manganese; 18 to 21 percentage by weight chromium; 15 to 21 percentage by weight cobalt; 0 to 0.015 percentage by weight phosphorus; 0 to 0.02 percentage by weight sulphur; 1 to 2 percentage by weight aluminium; 0 to 0.2 percentage by weight copper; 2 to 3 percentage by weight titanium; 0 to 0.15 percentage by weight zirconium; 0 to 0.02 percentage by weight boron; 1.5 percentage by weight iron; and residual component nickel and production-related impurities. ### Claim 16 (depends on 11) The sliding bearing according to claim 11, wherein the shaft material includes: 0.25 to 0.35 percentage by weight carbon; 0 to 0.3 percentage by weight silicon; 4 to 6 percentage by weight manganese; 24 to 26 percentage by weight chromium; 10 to 13 percentage by weight nickel; 0 to 0.2 percentage by weight phosphorus; 0 to 0.2 percentage by weight sulphur; 0 to 0.5 percentage by weight aluminium; 0 to 0.5 percentage by weight copper; 1.8 to 2.5 percentage by weight niobium; 0.5 to 0.7 percentage by weight nitrogen; and residual component iron and production-related impurities. ### Claim 17 (depends on 11) The sliding bearing according to claim 11, wherein the shaft material is a case-hardened steel. ### Claim 18 (depends on 11) An internal combustion engine comprising: a sliding bearing according to claim 11, and at least one gas exchange valve, which has a valve stem forming the shaft of the sliding bearing. ### Claim 19 (depends on 11) An electric motor comprising: with a sliding bearing according to claim 11; and a stator and a rotor, wherein the rotor is mounted on the stator rotatably relative to the stator via the sliding bearing. ### Claim 20 (depends on 1) The sintered bearing bush material according to claim 1, comprising: 0.5 to 1.3 percentage by weight, carbon; 0.2 to 0.9 percentage by weight, manganese; 0.2 to 1.0 percentage by weight, sulphur; 1.2 to 2.1 percentage by weight, nickel; 1.0 to 1.9 percentage by weight, molybdenum; 3.0 to 6.0 percentage by weight, copper; 0.2 to 0.8 percentage by weight, tin; and 0 to 0.4 percentage by weight phosphorus.