The slitting knife made from fine grain-sized tungsten carbide includes Circular blades, slitting knife and straight cutting blades Due to the high wear resistance and long life time, these cutters are widely used in the industry of paper Cutting and printing.

The production of extremely sharp, acutely angled cutting edges dictates that a fine grained carbide be used in blade Applications (in order to prevent large nicks and rough edges). Given the use of carbide which has an average grain size of 1 micron or less, carbide blade performance therefore becomes largely influenced by the % of Cobalt and the edge geometry， specified.Cuttingapplications that involve moderate to highshock loads are best dealt with by specifying 12-15 percent Cobalt and edge geometry having an included edge angle of about 40.

Applications that involve lighter loads and place a premium on long blade life are good candidates for carbide that contains 6-9 percent cobalt and has an included edge angle in the range of 30-35.