PURPOSE: To provide an apparatus for shear-cutting a stack of amorphous steel strips along a cutting plane that extends transversely of the stack.

CONSTITUTION: This apparatus comprises two blades 12, 14 that are positioned on both sides of a stack. The first surfaces 30, 36 of the respective blades are arranged so that they pass through one point on the corners 34, 40 of the blades, and make a prescribed rake angle α with respect to the reference planes 50, 52 normal to the cutting plane. The sum of the rake angles of two blades is made to be a negative value within the range of 5 to 35°. Further, both blades are made of a cemented carbide cutting material that consists essentially of tungsten carbide particles and cobalt particles compacted under high pressure and sintered at a temperature exceeding the melting point of the cobalt, and the tungsten carbide particles are, on average, of submicron size, and the cobalt constitutes 15% or more by weight (usually about 16% by weight) of the cemented carbide cutting material.