Company Filing History:
1 out of 407 
1 out of 2 Years Active: 1982
Title: Exploring the Innovative Contributions of Inventor Keizo Onishi
Introduction
Keizo Onishi, an accomplished inventor from Muroran, Japan, has made significant contributions to the field of welding technology. With a patented method designed to improve the overlay welding of stainless steel on pressure vessels, he has paved the way for enhanced performance in scenarios involving high temperature and pressure.
Latest Patents
Keizo Onishi holds a unique patent titled "Welding method for stainless steel weld overlay." This innovative method is specifically designed for overlay welding of stainless steel on inner surfaces of pressure vessels, particularly in applications involving hydrogen treatment at elevated temperatures, specifically below 450°C, and under high pressure, which can reach up to 150 kg/cm². The method addresses the challenge of preventing disbonding in the welded stainless steel by utilizing a first layer that includes a martensitic structure, achieving 4 to 40% by area, and optionally a ferritic structure of up to 8% by area. The patent details the precise chemical composition required for the stainless steel weld metal, ensuring optimal performance and durability.
Career Highlights
Throughout his career, Keizo Onishi has worked with reputable companies such as The Japan Steel Works, Ltd. and Chiyoda Chemical Engineering & Construction Co. His roles in these organizations have allowed him to gain valuable experience and insights into the complexities of materials engineering and welding processes.
Collaborations
Keizo Onishi has collaborated with notable professionals in his field, including coworkers Takao Adachi and Akiyoshi Fuji. These partnerships have enhanced his work and contributed to the development of his patent, showcasing the importance of teamwork in innovation.
Conclusion
The contributions of inventor Keizo Onishi to welding technology exemplify the impact of innovative thinking in industrial applications. His patented welding method for stainless steel has the potential to revolutionize practices in high-demand environments, ensuring safety and reliability in the treatment of hydrogen under extreme conditions. As the field continues to advance, Onishi's work stands as a testament to the importance of innovation in engineering and manufacturing.