Manufacture of a metal bonded abrasive product

B - Operations – Transporting – 24 – D

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B24D 3/10 (2006.01) C22C 26/00 (2006.01)

Patent

CA 2264858

A method of manufacturing a metal bonded abrasive product such as a saw or drill segment or bead for a diamond wire is provided. The method includes the steps of providing a mixture of the metal, in particulate form, and the abrasive particles, cold pressing the mixture to the desired final shape at a pressure in the range 320 to 1500 MPa to produce a cold pressed product at a temperature in the range 900 to 1300 °C under conditions which inhibit degradation of the abrasive particles and the particulate metal. The product, after free sintering, will generally have a relatively high porosity, for example, a porosity of 10 to 25 percent by volume.

L'invention a pour objet un procédé de fabrication d'un produit abrasif lié par un métal tel qu'une scie, un foret ou une perle pour fil diamanté. Le procédé inclut les étapes suivantes: premièrement, création d'un mélange qui comprend le métal sous forme particulaire et les particules abrasives et, deuxièmement, pressage à froid dudit mélange, ce qui permet d'obtenir la forme finale désirée dans une plage de pression allant de 320 à 1500 MPa; on obtient un produit pressé à froid dans une plage de température comprise entre 900 et 1300 DEG C, dans des conditions qui inhibent la dégradation des particules abrasives et du métal particulaire. Après le frittage libre, le produit possède, en règle générale, une porosité relativement élevée, par exemple, une porosité entre 10 et 25 % en volume.

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