Abstract: A layer-sintered valve seat ring is disclosed. The layer-sintered valve seat ring includes at least two materials including a function material for a tribological contact with an opposite runner and a support material for the function material. The support material includes: C: 0.5 to 1.8% by weight; Cr: 3 to 16% by weight; Mo: 1 to 5% by weight; W: 0.5 to 5.5% by weight; V: 0.4 to 4.0% by weight; Cu: 12 to 25% by weight; Fe: 41.3 to 82.6% by weight; Mn: up to 0.6% by weight; Si: up to 1.8% by weight; and a remainder of production-related contamination in the form of at least one of Ni, Co, Ca, P, and S that are present in contents of <0.3% by weight each.

Abstract: A robotic cleaner includes a housing, a suction conduit with an opening, and a leading roller mounted in front of a brush roll. An inter-roller air passageway may be defined between the leading roller and the brush roll wherein the lower portion of the leading roller is exposed to a flow path to the suction conduit and an upper portion of the leading roller is outside of the flow path. Optionally, a combing unit includes a plurality of combing protrusions extending into the leading roller and having leading edges not aligned with a center of the leading roller. Optionally, a sealing strip is located along a rear side of the opening and along a portion of left and right sides of the opening. The underside may define side edge vacuum passageways extending from the sides of the housing partially between the leading roller and the sealing strip towards the opening.

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.

Abstract: A sliding bearing may include an uncoated shaft and a bearing bush. The uncoated shaft may include a shaft material. The bearing bush may include a sintered bearing bush material. The shaft may be slidingly and moveably guided, relative to the bearing bush, within the bearing bush. The bearing bush material may have a residual porosity of 8 percent or more. A volume of the residual porosity may be filled with an oil up to 80 percent or more.

Abstract: A layer-sintered valve seat ring is disclosed. The layer-sintered valve seat ring includes at least two materials including a function material for a tribological contact with an opposite runner and a support material for the function material. The support material includes: C: 0.5 to 1.8% by weight; Cr: 3 to 16% by weight; Mo: 1 to 5% by weight; W: 0.5 to 5.5% by weight; V: 0.4 to 4.0% by weight; Cu: 12 to 25% by weight; Fe: 41.3 to 82.6% by weight; Mn: up to 0.6% by weight; Si: up to 1.8% by weight; and a remainder of production-related contamination in the form of at least one of Ni, Co, Ca, P, and S that are present in contents of <0.3% by weight each.

Abstract: A method for producing a powder-metallurgical product, in particular a bearing element or a motor component, is provided. According to the method, a metal powder, typically with a grain size between 2 ?m and 15 ?m, is melt-metallurgically produced and agglomerated into a powder mixture having a grain size smaller than 400 ?m by organic binders and waxes. Subsequently, the agglomerated powder mixture is formed into a green body typically by way of uniaxial pressing and the formed green body thermally debindered. Finally, the debindered green body is sintered typically at temperatures of 1000° C. to 1300° C. and the sintered body reworked into the powder-metallurgical product.

Abstract: A powder metallurgically produced, wear-resistant, and highly thermally conductive copper-based sintered alloy as matrix is disclosed. The sintered alloy includes a powder mixture of a copper-base powder, of a hard phase with a total share of 8 to 40% by weight, of a solid lubricant with a total share of 0.4 to 3.8% by weight, of a pressing additive with a total share of 0.3 to 1.5% by weight, and production-related impurities. The powder mixture includes at least 55% by weight of the copper-base powder.

Abstract: A method for producing a porous shaped body may include providing a mixture of a powder including at least one of a metal, a metal alloy, and a ceramic, with a resin/activator mixture. The method may then include introducing the mixture by core shooting into a cavity formed in a forming tool, and solidifying the mixture in the forming tool to give a shaped body. The method may then include heating the shaped body to remove at least one of organic constituents and gases present in the shaped body. The method may further include resolidifying the shaped body by a sintering operation.

Abstract: A sliding bearing may include an uncoated shaft and a bearing bush. The uncoated shaft may include a shaft material. The bearing bush may include a sintered bearing bush material. The shaft may be slidingly and moveably guided, relative to the bearing bush, within the bearing bush. The bearing bush material may have a residual porosity of 8 percent or more. A volume of the residual porosity may be filled with an oil up to 80 percent or more.

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.

Abstract: A method for producing a copper-infiltrated valve seat ring and a valve seat ring are disclosed. The method includes introducing a copper powder and a functional material powder mixture into a joint cavity, simultaneously forming the copper powder and the functional material powder mixture into a green body comprising a functional section and a copper section in the joint cavity by the mold element, and sintering the green body formed in step b) to produce the valve seat ring where the copper section liquefies during the sintering and infiltrates pores present in the functional section.

Abstract: A method for producing a powder-metallurgical product may include providing a powder mixture, forming the powder mixture into a green body, and sintering the green body to form a resulting powder-metallurgical product. The powder mixture may include a first hard phase, a second hard phase, 0 to 1.8% by weight of graphite, 0 to 5% by weight each of cobalt, tri-iron phosphide, copper, bronze, phosphorous, sulphur, calcium fluoride and molybdenum, 0.1 to 1.8% by weight of a pressing aid and a flow improver, and a remaining proportion that is an iron-base powder. The first hard phase may include 52 to 78% by weight of molybdenum, 0 to 2% by weight of silicon, 0 to 1.5% by weight of copper, and a remaining weight proportion of iron and production-related contaminations. The second hard phase may include 0 to 0.8% by weight of manganese and less than 0.1% by weight of carbon.

Abstract: A method for producing a copper-infiltrated valve seat ring and a valve seat ring are disclosed. The method includes introducing a copper powder and a functional material powder mixture into a joint cavity, simultaneously forming the copper powder and the functional material powder mixture into a green body comprising a functional section and a copper section in the joint cavity by the mold element, and sintering the green body formed in step b) to produce the valve seat ring where the copper section liquefies during the sintering and infiltrates pores present in the functional section.

Abstract: A method for producing a powder-metallurgical product, in particular a bearing element or a motor component, is provided. According to the method, a metal powder, typically with a grain size between 2 ?m and 15 ?m, is melt-metallurgically produced and agglomerated into a powder mixture having a grain size smaller than 400 ?m by organic binders and waxes. Subsequently, the agglomerated powder mixture is formed into a green body typically by way of uniaxial pressing and the formed green body thermally debindered. Finally, the debindered green body is sintered typically at temperatures of 1000° C. to 1300° C. and the sintered body reworked into the powder-metallurgical product.

Abstract: A method for producing a powder-metallurgical product may include providing a powder mixture, forming the powder mixture into a green body, and sintering the green body to form a resulting powder-metallurgical product. The powder mixture may include a first hard phase, a second hard phase, 0 to 1.8% by weight of graphite, 0 to 5% by weight each of cobalt, tri-iron phosphide, copper, bronze, phosphorous, sulphur, calcium fluoride and molybdenum, 0.1 to 1.8% by weight of a pressing aid and a flow improver, and a remaining proportion that is an iron-base powder. The first hard phase may include 52 to 78% by weight of molybdenum, 0 to 2% by weight of silicon, 0 to 1.5% by weight of copper, and a remaining weight proportion of iron and production-related contaminations. The second hard phase may include 0 to 0.8% by weight of manganese and less than 0.1% by weight of carbon.

Abstract: An insert part for a cast piston of an internal combustion engine may include a powder, such as a sintered powder material, containing at least iron or alloys thereof, and having a capacity for being infiltrated. The powder may contain particles having different grain sizes, and up to 4% by volume of the powder may include particles having a diameter smaller than 75 ?m.

Abstract: A method for producing a porous shaped body may include providing a mixture of a powder including at least one of a metal, a metal alloy, and a ceramic, with a resin/activator mixture. The method may then include introducing the mixture by core shooting into a cavity formed in a forming tool, and solidifying the mixture in the forming tool to give a shaped body. The method may then include heating the shaped body to remove at least one of organic constituents and gases present in the shaped body. The method may further include resolidifying the shaped body by a sintering operation.

Abstract: An insert part for a cast piston of an internal combustion engine may include a powder, such as a sintered powder material, containing at least iron or alloys thereof, and having a capacity for being infiltrated. The powder may contain particles having different grain sizes, and up to 4% by volume of the powder may include particles having a diameter smaller than 75 ?m.