Method for slicing workpiece and wire saw

A method for slicing a workpiece with a wire saw which includes a wire row formed by winding a fixed abrasive grain wire having abrasive grains secured to a surface thereof around a plurality of grooved rollers, the method comprising feeding a workpiece to the wire row for slicing the workpiece held by a workpiece holder with a bonding member bonded to the workpiece, while allowing the fixed abrasive grain wire to reciprocatively travel in an axial direction thereof, thereby slicing the workpiece at a plurality of positions aligned in an axial direction of the workpiece simultaneously,

• wherein the bonding member has a grindstone as a part,
• the method comprises, after the workpiece is sliced and before the workpiece is drawn out from the wire row, a fixed-abrasive-grain removal step of pressing the wire row against the grindstone to remove the fixed abrasive grains from the fixed abrasive grain wire while the fixed abrasive grain wire is reciprocatively traveling, and
• in the fixed-abrasive-grain removal step, the fixed abrasive grain wire is traveled at a wire rate of 100 m/min. or less, and the wire row is pressed against the grindstone at a load of 30 g or more for each line of the fixed abrasive grain wire.