| 摘要 |
The present invention addresses problems in the diamond saw blade and segment art. One aspect of the invention comprises a method for making handleable, strong, discrete, metal-clad abrasive pellets. This method comprises the steps of: (a) spraying onto a bed of gas-fluidized abrasive particles a slurry of metallic powder, a binding agent, and a volatile solvent until substantially all the abrasive particles are coated with at least about 20 wt-% of the metallic powder; (b) recovering the metal powder coated abrasive particles; and (c) heating said recovered coated particles under conditions to form a sintered continuous metal coating enveloping said abrasive particles. The resulting sintered metal-clad pellets form another aspect of the invention. Another aspect of the invention comprises a method for making saw blade segments from metal-clad abrasive particles, comprising the steps of: (a) placing a plurality of abrasive pellets, each comprising an abrasive particle coated with at least about 20 wt-% sintered metal, in a mold cavity; and (b) heating the contents of such mold cavity under conditions effective for forming an abrasive particle containing saw blade segment. Preferably, the weight percent of abrasive in each pellet is from about 1 weight percent to about 10 weight percent and the metal coating weight percent ranges from about 99 weight percent to about 90 weight percent. Pellets devoid of abrasive particles; i.e., "dummy" pellets can be included in the mold cavity in order to regulate the concentration of abrasive particles in the saw blade segment.
|
