Patent ID: 9233410
Filing Date: 2016-01-12
CPC Classification: B21D,B23K,B26D,B26F,C23F,G21K,Y10T

Claim Text:
1. A method for treating a stamping tool surface of a stamping tool for metal stamping that comprises irradiating the stamping tool surface with a gas cluster ion beam, the stamping tool surface being a surface that comes into contact with a workpiece material, wherein the gas cluster ion beam is irradiated in a direction substantially parallel to a direction of sliding between the stamping tool and the workpiece material, and a plurality of ripples having a stripe shape extending in a direction substantially perpendicular to the direction of sliding are formed thereby on the stamping tool surface, wherein the plurality of ripples formed on the stamping tool surface have depths ranging from 10 to 100 nm and periodicities ranging from 100 to 1000 nm.