Sandvik Ab

Peder Von Holst

Rolf G Oskarsson

Josef Giessler

Hakan Morberg

Bjorn Hakansson

There is provided a solid ball nose tool comprising a hard material with 30-70 volume % submicron hard constituents in the form of carbides, nitrides and/or carbonitrides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W in a metallic matrix based on Fe, Co and/or Ni. The tool has a constant positive rake angle along the whole end radius of +8+2.degree. and a continuously decreasing clearance angle and towards the center where it is 10.+-.2.degree..

Ball nose end mills

A threading tap comprises a cylindrical shaft and a threading portion. At least the threading portion comprises a compound material comprising a core of high speed steel or tool steel and a cover of 'Coronite'.RTM., i.e., a hard material with 30 to 70% by volume of submicronic hard materials in the form of carbides, nitrides and/or carbonitrides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W in a metallic matrix based on Fe, Co and/or Ni. The chip surfaces adjacent to the cutting edges of the cutting threads have a negative rake angle. The threading tap has proven to be excellent at the threading of titanium-based alloys.

Threading tap

The present invention relates to a method of preparing an alloy for use as a cutting tool material comprising hard principles and binder phase by which a uniform distribution of the hard principles in the binder phase is obtained, and the resulting product.

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Sandviken, Sweden

Peder Von Holst