| 摘要 |
<p>A cutting tool (10,10',30) for cutting hard materials is provided, having at least one preformed cutting element (20, 20', 40) including an outer cutting portion (22, 22',32) containing cutting particles (24, 24', 34) of abrasive material bonded and held together by a matrix (26, 26', 36) of metal bonding material and an inner non-cutting metal portion (28, 28', 38) of either the same metal bond matrix (26, 26', 36) or a different metal, laser beam fusion welded to a metal wall portion of a metal support (12, 12', 32) of a different metallic composition by strong laser fusion welded seamless phase of the adjoining portions of the united inner noncutting and wall portions. Also disclosed is a process for making the cutting tool comprising: providing a preformed cutting element with an integral inner non-cutting portion and inner mating surface holding, pressing and maintaining the cutting element and the inner mating surface in mating engagement with a mating outer support surface of a wall of a metal support and focusing and directing a high energy laser beam heat source of sufficient capacity at and along a interface of the mating surface at a sufficient rate to alloy and fuse adjoining portions of the inner, non-cutting portion and the wall together into a seamless strong coherent laser beam welded phase (WP) without any visible sign of the original line of demarcation initially created at the interface by the mating surfaces.</p> |
