Laser hardened steel cutting rule

摘要

A hardened steel cutting rule obtained by the process of a first step of applying a first laser beam having a first intensity and focused to a first focal point to a selected surface area of a steel cutting rule, and a second step of applying a second laser beam having a second intensity and focused to a second focal point to the selected surface area. The hardened steel cutting rule may also be obtained by the process of applying a laser beam absorbent substance to a selected surface area of a steel cutting rule, applying a first laser beam having a first intensity and focused to a first focal point to the selected surface area of the steel cutting rule, and applying a second laser beam having a second intensity and focused to a second focal point to the selected surface area.