Title:
【発明の名称】木材加工用途の耐食性及び耐酸化性の品位のPCD/PCBN
Document Type and Number:
Japanese Patent JPH11505483
Kind Code:
A
Abstract:
A cutting tool for woodworking applications has a tungsten carbide substrate and a hard layer bonded to the substrate at high temperature and high pressure, i.e. where diamond or cubic boron nitride is thermodynamically stable. The hard layer comprises polycrystalline diamond or polycrystalline cubic boron nitride, and a supporting cobalt phase including adjuvant alloying materials for providing oxidation and corrosion resistance. Typical alloying elements include nickel, aluminum, silicon, titanium, molybdenum and chromium. Such materials also retard transformation of cobalt from the HCP to the FCC crystal structure at high temperature. The hard layer has an as-pressed surface parallel to the substrate and is only about 0.3 millimeters thick. An additional secondary phase including a carbide, nitride and carbonitride of metals such as titanium may also be present in the PCD or PCBN layer.
Inventors:
Ederido, stephan
Packer, Scott M.
Rye, Gunsham
Rodriguez, Arts Roei.
Packer, Scott M.
Rye, Gunsham
Rodriguez, Arts Roei.
Application Number:
JP53476096A
Publication Date:
May 21, 1999
Filing Date:
May 15, 1996
Export Citation:
Assignee:
Sandvik actie borrag
Smith International, Inc.
Smith International, Inc.
International Classes:
C22C26/00; C22C29/16; C23C24/08; C23C28/04; C23C30/00; B27G13/08; (IPC1-7): B27G13/08; C22C26/00; C22C29/16; C23C24/08; C23C28/04
Attorney, Agent or Firm:
Takashi Ishida (3 others)