Tsuyoshi Yasui

Title: Innovations of Tsuyoshi Yasui: Precision Engineering and Decorative Coatings

Introduction: Tsuyoshi Yasui is a renowned inventor based in Yokohama, Japan, acclaimed for his contributions to the field of materials engineering. With a total of three patents to his name, Yasui has significantly impacted industries such as precision machinery and electronics through his innovative approaches.

Latest Patents:

1. **Precision parts of non-magnetic stainless steels**: This invention presents a non-magnetic stainless steel designed specifically for small components in precision machines and electronic devices. The alloy consists of 9 to 22% nickel, 12 to 26% chromium, with the balance being iron and unavoidable impurities. The iron-based alloy's martensitic area ratio is maintained at no more than 20%, allowing the stainless steel to exhibit excellent workability. This makes it an ideal raw material for parts such as TV electron gun components and small gears that undergo intense forming processes like blanking.

2. **Method of forming a decorative metallic nitride coating**: Yasui's second patent introduces a method for applying a decorative metallic nitride coating on substrates. This process involves placing the substrate as a cathode in a material gas atmosphere at pressures ranging from 0.1 to 10 Torr while maintaining the substrate temperature between 200°C to 1000°C. By applying a voltage between 200 to 8000 V, a direct current glow discharge is generated, using a mixed gas of titanium, zirconium, or hafnium halides, hydrogen, and nitrogen. This innovative method results in a uniform and aesthetically appealing metallic nitride coating, characterized by long-lasting luster and mar resistance, offering the capability to achieve varied tones on its surface.

Career Highlights: Yasui's professional journey includes significant tenures at notable companies such as Tokyo Shibaura Denki (now known as Toshiba Corporation) and Toshiba Corporation. His work within these industries has solidified his reputation as a leading figure in the development of high-quality materials.

Collaborations: Throughout his career, Tsuyoshi Yasui has collaborated with talented individuals such as Masahiko Hirose and Masahiko Yotuyanagi. Their joint efforts in research and development have further enriched the fields of materials science and engineering.

Conclusion: Tsuyoshi Yasui's contributions to the world of inventions, particularly in non-magnetic stainless steels and decorative coatings, demonstrate his remarkable ingenuity and dedication to advancing technology. His patents not only reflect his deep understanding of materials but also highlight the importance of innovation in driving industries forward.