The invention relates to a drilling tool (50), in particular a dowel hole drill, for the machining of workpieces, in particular workpieces made of wood, plastics, composite materials, comprising a drill shaft (56) with a front surface (60), and to a drill head (58) with at least one cutting edge (66), which is firmly connected, such as soldered, to the drill shaft (56). In order to make available a drilling tool of the type mentioned at the start, which has a broad range of application and is simple to produce, it is provided that the drill head (58) is formed from a composite material with exclusively two layers (38), namely a hard metal layer (36) and an ultra-hard layer (38) which is connected to the hard metal layer (36) and preferably formed from polycrystalline diamond or polycrystalline boron nitride, that the ultra-hard layer (38) is connected directly to the front surface (60) of the drill shaft (56) and that the at least one cutting edge (66) is formed by the ultra-hard layer (38), and a drill bit (62) such as a centering tip is formed by the hard metal layer (36).

A system for treating material of a cutting element may include a method, and the method may include providing a piece of material to form a blank for the cutting element, and applying a cladding material to at least a portion of the blank utilizing a laser to bond a cladding powder to the exterior surface of the blank. The application may include selecting and utilizing a power level of the laser and a rate of movement of the spot of the laser across the exterior surface which is effective to form a stratum of martensite in the substrate of the material below the exterior surface and the cladding material bonded to the exterior surface. The method may further include removing a portion of the cladded blank to form a cutting edge with a portion of the stratum of martensite exposed at the cutting edge.

There is provided a tool blade, comprising a backing strip particles of abrasive material and a binder layer of binding material which binds the abrasive particles along an edge of the backing strip, wherein the edge of the backing strip is pre-formed with teeth, on which the abrasive particles are bound by the binding material. A profiled cutting portion extends beyond the pre-formed teeth. The pre-formed teeth are shaped as generally triangular waves or are flattened at least partially along an upper edge on which the cutting portion is at least partially disposed. A method of making such a blade is also provided.

A ring forming step includes welding opposite ends of a band saw blade including a body part having a band shape, and a tooth part including a plurality of teeth formed on one side part of the body part, to form a ring shape. A polishing step includes polishing an inner surface, an outer surface, and an end face on a side opposite to the tooth part in the ring-shaped band saw blade subjected to the ring formation. A tip tooth tip forming step includes positioning, after the polishing step, the ring-shaped band saw blade subjected to the ring formation by use of one of the inner surface and the outer surface, and the end face as references, joining a cutting tip to tooth tips of the plurality of teeth by welding, and polishing the joined cutting tip to form a tooth tip shape.

A cutting insert comprises: a body; and a blade fixed to the body and made of a polycrystalline cubic boron nitride including 98.5% by volume or more of cubic boron nitride, the blade having a rake face and a flank face, the rake face and the flank face meeting each other and thus forming a ridge line which serves as a cutting edge, the rake face being provided with a land surface extending along the cutting edge, and a chip breaker disposed on a side opposite to the cutting edge with the land surface therebetween and also having a recess contiguous to the land surface.

An insert tool, in particular a chisel or a drill, has a tool head, with a shaft region in which a main body is arranged. The main body has a first hardness, and with a coating which has a second hardness that is greater than the first hardness. The coating has chromium carbide or consists of chromium carbide. Advantageously, the durability of the insert tool can be prolonged as a result.

A method of assembling a first part made from a metal and a second part includes providing a first part comprising an assembly surface, and a second part comprising at least one through orifice. At least part of the second part is arranged on the assembly surface such that the orifice extends across from the assembly surface. A metal connecting part is positioned on the orifice to cover the orifice across from the assembly surface. The connecting part and/or the assembly surface are projected on one another to obtain high-speed plating and welding between the connecting part and the surface part.

The invention relates to a method for welding hard material bodies to teeth of a saw blade, in particular of a band saw blade or circular saw blade, wherein each tooth has a joining surface, and each hard material body has a joining surface. The joining surface of the hard material body can be welded to the joining surface of the tooth. The method has the following steps: bringing each tooth of the saw blade into a working region; guiding each hard material body towards the tooth located in the working region; advancing a welding device into the working region; welding the hard material body to the tooth surface of the tooth located in the working region; and withdrawing the welding device out of the working region. According to the invention, at least one welding introduction attachment which protrudes from the joining surface of the tooth is formed on each tooth or at least one welding introduction attachment which protrudes from the joining surface of the hard material body is formed on each hard material body. The welding introduction attachment is melted upon introducing a welding pulse.

A silver brazing material containing silver, copper, zinc, manganese, nickel, and tin as indispensable constituent elements. The silver brazing material includes 35 mass % or more and 45 mass % or less silver, 18 mass % or more and 28 mass % or less zinc, 2 mass % or more and 6 mass % or less manganese, 1.5 mass % or more and 6 mass % or less nickel, and 0.5 mass % or more and 5 mass % or less tin, with the balance being copper impurities. Within these compositional ranges, a predetermined relation is set between the manganese content and the nickel content, whereby the silver brazing material can be provided with excellent characteristics also in terms of processability or wettability. In the silver brazing material of the present invention, the silver content is reduced, and also melting point reduction and the narrowing of the temperature difference between solidus temperature and liquidus temperature are attempted.

A continuous feed method for friction stir processing includes continuously feeding a tubular material having a first grain microstructure from a bulk source into a processing chamber, and forcing the tubular material between a die and a textured end portion of a mandrel as the tubular material is advanced through the chamber. The continuous feed method further includes rotating the mandrel within the tubular material while forcing the tubular material across the textured end portion to friction stir process the tubular material and transform a structure of the tubular material from the first grain microstructure to a second grain microstructure. The second grain microstructure is a finer equiaxed grain microstructure than the first grain microstructure. The method further includes converting the tubular material having the second grain microstructure into a stiffened sheet form.