Abstract:
A rock drill button, comprising a body made of sintered cemented carbide that comprises hard constituents of tungsten carbide (WC) in a binder phase comprising Co, wherein the cemented carbide comprises 4-12 mass% Co and balance WC and unavoidable impurities. The rock drill button is characterized in that said cemented carbide also comprises Cr in such an amount that the Cr/Co ratio is within the range of 0.043-0.19, and that the WC grain size mean value is above 1.75 µm.
Abstract:
A method of producing a component of a composite of diamond and a binder, wherein a Hot Isostatic gas Pressure process (HIP) is used, comprising the step of enclosing a de-bound green body (1) comprising compacted diamond particles in an infiltrant (2). The method comprises the further steps of enclosing said de-bound green body (1) and infiltrant (2) in a Zr-capsule (3) that comprises Zirconium as a main constituent and sealing the Zr-capsule (3), and applying a predetermined pressure-temperature cycle on the unit formed by said de-bound green body (1), infiltrant (2) and capsule (3) in which the infiltrant (2) infiltrates the de-bound green body (1) and the de-bound green body (1) is further densified in the sense that the volume thereof is decreased.