Company Filing History:
Years Active: 2019-2024
Title: Innovations of Hirofumi Ohtsubo in Duplex Stainless Clad Steel
Introduction
Hirofumi Ohtsubo is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of materials science, particularly in the development of duplex stainless clad steel plates. With a total of three patents to his name, Ohtsubo's work has implications for various industrial applications.
Latest Patents
Ohtsubo's latest patents focus on the production of duplex stainless clad steel plates. One of his patents discloses a duplex stainless clad steel plate where a duplex stainless steel plate is bonded to one or both surfaces of a base steel plate. The base steel plate is designed with a specific chemical composition, ensuring that Nb/N is 3.0 or more and Ceq is between 0.35 and 0.45. The duplex stainless steel plate also has a predetermined chemical composition, with PI ranging from 34.0 to 43.0, and a microstructure that contains a ferrite phase in an area fraction of 35% to 65%. Additionally, the microstructure limits the amount of precipitated Cr to 2.00% or less and Mo to 0.50% or less. Another patent presents a similar design but with variations in the chemical composition, where PI is between 33.0 and 38.0, and the microstructure has a lower precipitated Cr content of 1.00% or less.
Career Highlights
Hirofumi Ohtsubo is currently employed at JFE Steel Corporation, a leading company in the steel industry. His work at JFE Steel has allowed him to focus on innovative materials that enhance the performance and durability of steel products. Ohtsubo's expertise in materials science has positioned him as a key figure in the development of advanced steel solutions.
Collaborations
Ohtsubo has collaborated with notable colleagues, including Yota Kuronuma and Tomoyuki Yokota. Their combined efforts have contributed to the advancement of steel technology and the successful implementation of innovative materials in various applications.
Conclusion
Hirofumi Ohtsubo's contributions to the field of duplex stainless clad steel are significant and impactful. His patents reflect a deep understanding of materials science and a commitment to innovation. Ohtsubo's work continues to