Abstract: The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- or PVD-fabricated diamond and then HP/HT treated in the diamond stable area. The bodies of cemented carbide may have a uniform structure or a multi-structure containing eta-phase surrounded by a surface zone of cemented carbide free of eta-phase.

Abstract: The present invention relates to a rock bit button of cemented carbide for percussive or rotary crushing rock drilling. The button is provided with a layer of diamond produced at high pressure and high temperature in the diamond stable area.The cemented carbide has a multi-phase structure having a core that contains eta-phase surrounded by a surface zone of cemented carbide free of eta-phase.

Abstract: The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- or PVD-fabricated diamond and then HP/HT treated in the diamond stable area. The bodies of cemented carbide may have a uniform structure or a multi-structure containing eta-phase surrounded by a surface zone of cemented carbide free of eta-phase.

Abstract: The present invention relates to a rock bit insert of cemented carbide for cutting rock drilling. The insert is provided with one or more bodies or layers of diamond or cBN produced at high pressure and high temperature in the diamond or cBN stable area.The body of cemented carbide has a multi-structure containing eta-phase surrounded by a surface zone of cemented carbide free of eta-phase and having a low content of cobalt in the surface and a higher content of cobalt next to the eta-phase zone.

Abstract: The present invention relates to a rock bit button of cemented carbide for percussive or rotary crushing rock drilling. The button is provided with one or more bodies of polycrystalline diamond in the surface produced at high pressure and high temperature in the diamond stable area. Each diamond body is completely surrounded by cemented carbide except the top surface.

Abstract: Temperature resistant abrasive polycrystalline diamond bodies are described, intended for use as tools in various mechanical operations like turning, milling, drilling, sawing and drawing, having different additions, i.e. amount and composition, of binding, fluxing, catalyst metals at different distances from the working surface. Preferably the metal concentration of the polycrystalline diamond body is decreasing towards the working surface while the metal composition is varied in a way that gives a mechanically stiffer matrix that also has a lower thermal expansion.In one embodiment the diamond body is high pressure-high temperature-bonded to a supporting body, e.g. of cemented carbide, in order to facilitate the clamping of the tool. In another embodiment the diamond body is brazed to a supporting body or used in a surface-set rock drill bit, i.e. held by a braze metal.

Abstract: A polycrystalline diamond tool comprising a diamond layer is bonded to a support body having a complex, non-plane geometry by means of a thin more than 3 .mu.m continuous layer of a refractory material applied by PVD or CVD technique.

Abstract: A tool or wear part comprises a cast iron or cast steel body carrying a plurality of cast-in inserts. Each insert comprises a cemented carbide cutting or wearing element partially embedded in the body, and an enclosure completely surrounding the embedded portion of the element. The enclosure is cast-in with respect to the body and has a higher melting point than the body. The enclosure is connected by a metallurgical bond to the body and by a shrink-fit to the element.

Abstract: In wear parts consisting of sintered cemented carbide and cast alloy on iron base, in which a wear resistant layer of cast-in-carbide is formed in the most exposed parts of the product, the chipping of cemented carbide from the wear layer can be essentially eliminated according to the invention by applying a layer of another metallic material, for example steel, between the cast alloy and the wear layer.

Abstract: A wear part with high wear and abrasion resistance combined with unlimited weldability and good mechanical strength or toughness, comprising a composite part of hard metal portion, a cast metal alloy body portion and attached thereto to joining portion, characterized in that the joining portion consists essentially of a weldable steel which by casting is bonded to the cast metal alloy body portion to a combined mechanical-metallurgical bond is provided, as well as a method for forming such a wear part.