Location History:
- Yasugi, JP (2019)
- Tokyo, JP (2021 - 2023)
Company Filing History:
Years Active: 2019-2023
Title: Hiroyoshi Fujihara: Innovator in Martensitic Stainless Steel Technology
Introduction
Hiroyoshi Fujihara is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of materials science, particularly in the development of martensitic stainless steel. With a total of 3 patents to his name, Fujihara's work focuses on enhancing the properties of stainless steel for various applications.
Latest Patents
Fujihara's latest patents include a martensitic stainless steel strip and a method for producing the same. The martensitic stainless steel strip is designed to achieve higher fatigue strength. It features a martensite structure with a thickness of 1 mm or less. This innovative strip is characterized by a compressive residual stress at its surface of 50 MPa or more, along with an areal ratio of carbides present in the metal structure ranging from 0.5% to 8.0%. Additionally, the compressive residual stress in a direction perpendicular to rolling is at least 50 MPa greater than that in the direction of rolling. The method of producing this martensitic stainless steel strip involves a quenching furnace that includes a temperature raising unit and a holding unit, ensuring optimal conditions for the steel strip during production.
Career Highlights
Fujihara has worked with notable companies such as Hitachi Metals, Ltd. and Proterial, Ltd. His experience in these organizations has allowed him to refine his expertise in materials engineering and contribute to advancements in stainless steel technology.
Collaborations
Throughout his career, Fujihara has collaborated with esteemed colleagues, including Tomonori Ueno and Ichirou Kishigami. These partnerships have fostered innovation and the exchange of ideas in the field of materials science.
Conclusion
Hiroyoshi Fujihara's contributions to the development of martensitic stainless steel technology highlight his role as a key innovator in the industry. His patents reflect a commitment to enhancing material properties for practical applications.