Hirofumi Yamashita

Title: Innovations of Hirofumi Yamashita in Electrical Steel Technology

Introduction

Hirofumi Yamashita is a notable inventor based in Himeji, Japan. He has made significant contributions to the field of electrical steel technology, particularly in the development of grain-oriented electrical steel sheets. His innovative work has implications for various applications in the electrical industry.

Latest Patents

Hirofumi Yamashita holds a patent for a grain-oriented electrical steel sheet that exhibits stable magnetic properties. This invention proposes a steel sheet with a low watt loss after stress relief annealing. The final texture of the steel sheet is achieved through a specific annealing process, and it features recessed parts on its surface that form indentations with a depth ranging from 0.01 to 0.1 mm. These recessed parts are filled with a composition that has a coefficient of thermal expansion smaller than that of the steel sheet body. This design allows for the subdivision of magnetic domains, enhancing the material's performance.

Career Highlights

Hirofumi Yamashita is associated with Nippon Steel Corporation, where he has been instrumental in advancing electrical steel technology. His work has not only contributed to the company's portfolio but has also set new standards in the industry.

Collaborations

Hirofumi has collaborated with notable colleagues such as Hisashi Kobayashi and Motoharu Nakamura. Their combined expertise has fostered innovation and development in their respective fields.

Conclusion

Hirofumi Yamashita's contributions to the field of electrical steel technology exemplify the impact of innovative thinking in industrial applications. His patent for a grain-oriented electrical steel sheet with stable magnetic properties showcases his commitment to advancing technology in this area.