Machining Characteristics of Rock by Wire-sawing in Vacuum (3rd Report)

Influence of Nickel Adhesion on Rock Surface

Abstract

It is expected for wire-sawing to keep cutting performance due to successive supply of cutting edges in vacuum. Because the nickel bond of the saw wire is softer than basalt, the nickel was shaved and adhered onto basalt. The diamond grits on the saw wire slips on it. Although the machining amount was decreased with a decrease of the vacuum pressure, the tool wear of both bare and nickel-coated saw wires was almost constant. Consequently, the grinding ratio, which is the ratio of the machining amount to the wear, was small at high vacuum. The dispersion of carbon from diamond into nickel caused the tool wear.