Abstract: A gyratory crusher includes a first shell-having a support surface intended to abut against a shell-carrying member, and a first crushing surface intended to be brought into contact with material fed into the upper portion of the crusher, to crush the material against a corresponding second crushing surface disposed on a second shell arranged opposite the first shell. The first and second crushing surfaces oppose one another in spaced relationship to form a gap through which the material travels as it is being crushed. The gap includes an upper inlet and a lower outlet. Over at least 50% of the vertical height, from the outlet upwards toward the inlet, the first crushing surface is machined to a run-out tolerance, which on each level along the machined part of the vertical height does not exceed one thousandth of the largest diameter of the first crushing surface, or 0.5 mm, whichever is less.

Abstract: A cemented carbide tool comprising hard constituents in a binder phase of Co and/or Ni and at least one surface portion and an interior portion in which surface portion the grain size is smaller than in the interior portion is disclosed. The surface portion with the fine grain size has a lower binder phase content than the interior portion. A method to form the cemented carbide cutting tool is also disclosed.

Abstract: A cutting tool includes two parts releasably interconnectable via serration surfaces which are mechanically engageable in each other. At least one of the parts is composed of a first body and a supplemental body on which the serration surface of the one part is formed, and which via a permanent joint is stiffly united to the first body. The permanent joint can be established by laser-welding a shim disposed between the first body and the supplemental body.

Abstract: The invention relates to an arrangement for mounting electric heating elements in a furnace in which objects are intended to be heated, wherein the furnace wall includes a furnace insulation (4) comprised of high grade brick, and wherein the heating zones (6) of respective electric heating the inner surface of the furnace wall in operation.

Abstract: A cemented carbide including WC, a binder phase based on Co, Ni or Fe, and gamma phase, in which said gamma phase has an average grain size <1 ?m. A method of making the cemented carbide is provided in which the powders forming gamma phase are added as mixed cubic carbides of one or more of Ti, Ta, Nb, Zr, Hf and V, and a ratio, fWC, between an amount of WC (in mol fraction of WC) and an equilibrium gamma phase WC content at a sintering temperature (in mol fraction WC) is given by fWC=xWC/xeWC, wherein fWC is 0.6 to 1.0.

Abstract: An austenitic alloy with the following composition, in weight-%: Cr 23-30 Ni 25-35 Mo 3-6 Mn 1-6 N ??0-0.40 C up to 0.05 Si up to 1.0 S up to 0.02 Cu up to 3.0 and the balance iron and normally occurring impurities and additions.

Abstract: A ferritic stainless steel alloy useful as a substrate for catalytic converter material consists of, by weight: 15-21% Cr, 8-12% Al, 0.01-0.09% Ce, 0.02-0.1% total of REM, and possible minor amounts of further elements, other than the ones mentioned, the balance being Fe with normally occurring impurities. These alloys have managed to combine a high content of Al with a good hot and cold workability.

Abstract: An electrical resistance heating element operable at extremely high temperature, up 2300° C. when used in a vacuum or in a reducing atmosphere, and up to bout 1200° C. when used in an oxidizing atmosphere. The element is formed substantially from titanium silicon carbide (Ti3SiC2), which is readily workable to enable it to be produced in different forms. It also has a higher mechanical strength than that of graphite heating elements.

Abstract: A rotatable tool for chip removing machining includes two parts, viz. a holder part, rotatable around a geometrical center axis, and a replaceable cutting part, which is rigidly connectable to a front end of the holder part via a male/female coupling. The coupling includes a tapering seat in the holder part and a tapering male member, protruding rearwardly from the cutting part. In the seat, there is a slot, which separates two elastically deflectable projections, that may be inwardly deflected towards each other during clamping of the male member in the seat. The male member is elongated in a radial direction, and the seat is in the form of a radial groove into and out of which the sheath body is transversely movable. The male member includes a dove-tail shaped portion received in a dove-tail shaper portion of the groove. A centering button on the male member enters a depression in the holder part to axially center the cutting part.

Abstract: A rotatable cutting tool for chip-removing machining includes a basic body which defines a center axis of rotation. Cutting inserts are detachably mounted in respective cutting seats that are formed in the basic body. Each insert has a square shape and includes first and second pairs of mutually parallel major cutting edges, four corners, and four wiper edges. Each wiper edge is situated between a major cutting edge and a respective corner. The wiper edges are shorter than the major cutting edges and are inclined relative thereto, wherein an imaginary extension line of the wiper edge forms a first acute angle with the respective major cutting edge as the insert is viewed in a direction perpendicular to the top surface. The cutting seats are arranged to orient the inserts wherein an axially forwardmost wiper edge of each insert lies in a plane oriented perpendicular to the axis, and wherein a radially outermost wiper edge of each insert is oriented parallel to the axis.

Abstract: The present invention relates to a method of milling a material comprising aluminum and cast iron. By using a silicon nitride based cutting tool insert at a cutting speed of more than 1000 m/min, an unexpected increase in tool life has been obtained.

Abstract: A machine spindle includes a rotatable casing in which a clamping device is mounted. The clamping device includes a drawbar for securing a cutting tool. The drawbar is axially displaced by a gas spring which includes a chamber in which a lubricant-containing gas medium is confined. A piston includes a head slidable within a cylindrical upper portion of the chamber, and a rod extending through a lower portion of the chamber and connected to the drawbar. The lower portion of the chamber is non-cylindrical and widens upwardly to promote the upward travel of lubricant toward the piston and upper seals under the effects of centrifugal force during rotation of the spindle.

Abstract: A blast-hole drilling rig includes a carriage, a mast disposed on the carriage, and a rotary head mounted on the mast for up-and-down movement. The rotary head includes: a housing forming an internal chamber, a hydraulically driven motor, and a rotation transmission mechanism disposed in the chamber. The rotation transmission mechanism includes a gear system having a high-speed power input section operably connected to the motor, and a low-speed power output section adapted for connection to a drill pipe. The rotation transmission mechanism includes an anti-vibrational inertial body forming part of the high-speed power input section for storing rotational energy to even-out rotary speed variations and resist the generation of vibrations during operation. The inertial body includes a downwardly open recess in which the motor casing extends, wherein the motor projects downwardly past a bottom wall of the housing.

Abstract: A tool for chip removing machining includes a holder and a tool head removably attached to the holder by screws. The head, which carries at least one cutting insert, has a serrated surface mated with a serrated surface of the holder. Those serrated surfaces define an interface between the holder and the head which is oriented at a 45 degree angle with respect to a basal plane extending through the holder and containing a longitudinal axis thereof.

Abstract: A product resistant or immune to carburization, metal dusting, coking, oxidation, and having sufficient mechanical strength for use at temperatures greater than 400° C. The product consists of a load-bearing member and a corrosion resistant member, wherein the corrosion resistant member is a Cu—Al-alloy comprising Si. The product can be used in CO-containing atmospheres, and/or hydrocarbon containing atmospheres or solid carbon containing processes. A method of resisting carburization, metal dusting, coking and oxidation is also disclosed.

Abstract: A copper-base alloy with increased melting point above 1000° C., which is resistant or immune to carburization, metal dusting and coking, resistant to oxidation at elevated temperatures. The alloy has the following composition (in weight-%): Al 4-15, Si 0.1-6, Mo 0.5-40, W 0-40, where the total of Mo and W do not exceed 40%, one or more of the group of Rare Earth Metals (REM), such as yttrium, hafnium, zirconium, lanthanum and/or cerium, up to 1.0 weight-% of each element or a total of maximum 3.0 weight-%, Cu balance and normally occurring alloying additions and impurities. A method for the alloy's production, and the alloy's use as construction components in CO-containing atmospheres, ammonia containing atmospheres, and/or hydrocarbon containing atmospheres or solid carbon containing processes, are also disclosed.

Abstract: A cemented carbide with excellent properties for oil and gas applications regarding resistance to the combined erosion and corrosion synergistic effects at temperatures between ?50 and 300° C. and toughness. This object has been achieved with a cemented carbide containing, in weight %, 8-12 Co+Ni with a weight ratio Co/Ni of 0.25-4, 1-2 Cr and 0.1-0.3 Mo wherein essentially all of the WC grains have a size <1 ?m and with a magnetic cobalt content between 80 and 90% of that chemically determined.

Abstract: A coated steel strip product with a dense and hard abrasion resistant coating on one side or both sides of said strip. The thickness of said coating is in total maximally 25 ?m, the hardness of said coating is at least 600 HV and the tensile strength of the steel strip substrate is at least 1200 MPa. The coating is preferably applied by electron beam evaporation and the coating may be, e.g., of Al2O3. The coated metal strip is useful for the manufacturing of doctor and coater blades for paper and printing industry.

Abstract: A coated steel strip product with a dense and hard abrasion resistant coating on one side or both sides of said strip substrate is provided. The thickness of said coating is in total maximally 25 ?m, the hardness of said coating is at least 600 HV and the tensile strength of the steel strip substrate is at least 1200 MPa. The coating is preferably applied by electron beam evaporation and the coating may be, e.g., of Al2O3. The coated metal strip is suitable for shaving equipment, medical instruments, utility and industrial knives as well as saw applications.

Abstract: A rock drill includes a housing in which are disposed a reciprocable percussive device, slidably mounted in the housing, a rotary device, and a shank adapter aligned with the percussive device. The shank adapter includes first and second adapter portions. The first adapter portion has a front end and a rear end, the rear end arranged to be impacted by the percussive device and rotated by the rotary device. The second adapter portion has a rear end releasably connected to the front end of the first adapter portion, and a front end carrying a coupling adapted for connection with a drill rod component.