Yukio Kawaoka

Title: Yukio Kawaoka and a Tough, Corrosion-Resistant Cutting Material.

Introduction

Yukio Kawaoka is an inventor associated with Omiya, Japan, and Mitsubishi Materials Corporation. His patent work addresses the manufacture of a cutting material designed to combine high strength and toughness with resistance to corrosion, wear, and chipping.

Latest Patents

Kawaoka is credited with 1 patent: “Procedure for Manufacturing Cutting Material of Superior Toughness.” The invention describes processing a nickel-alloy ingot containing chromium, molybdenum, tungsten, iron, and cobalt, with nickel and unavoidable impurities making up the remainder.

After solution heat treatment, the ingot is plastically worked at a product ratio above 80 percent and then heated at 500–600°C for more than 30 minutes. According to the patent description, this treatment promotes precipitation of a hard intermetallic compound, with hardness exceeding 57 HRC. The resulting material is intended to resist corrosion, including exposure to seawater, while offering improved resistance to rust, chipping, and abrasion compared with conventional stainless-steel cutting materials.

Career Highlights

Kawaoka’s documented patent highlights his work on alloy composition and heat-treatment processes for cutting materials. The invention focuses on balancing hardness and strength with toughness and corrosion resistance, qualities important to demanding cutting applications.

Collaborations

The supplied information identifies Hiro Ohzeki and Kenji Kaneko as Kawaoka’s coworkers. It does not specify their roles in the patent or describe particular collaborative contributions.

Conclusion

Yukio Kawaoka’s patent presents a nickel-alloy processing method intended to produce durable cutting material with strong resistance to corrosion, wear, and chipping.