Taku Hirosawa

Title: Taku Hirosawa: Innovator in Fe-Ni-Based Superalloys

Introduction

Taku Hirosawa is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of materials science, particularly in the production of Fe-Ni-based superalloys. With a total of 2 patents to his name, Hirosawa's work focuses on enhancing the properties of superalloys used in various industrial applications.

Latest Patents

His latest patents include a production method for ring-rolled material of Fe-Ni-based superalloy. This method aims to produce a ring-rolled material that exhibits high circularity, inhibits AGG, and prevents grain growth. The process involves a finishing ring rolling step where a ring-shaped material is heated to a temperature range of 900° C. to 980° C. and then subjected to finishing ring rolling. Additionally, a circularity correcting step is implemented to correct the ellipticalness of the ring-rolled material while expanding its diameter using a specialized ring expander.

Another patent focuses on a similar production method for ring-rolled material of Fe-Ni-based superalloy. This method also aims to inhibit AGG and achieve a fine-grained structure with an ASTM grain size number of at least 8. The process includes heating the ring-shaped material and correcting ellipticalness while expanding the diameter, ensuring high circularity in the final product.

Career Highlights

Throughout his career, Hirosawa has worked with prominent 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 innovation.

Collaborations

Hirosawa has collaborated with notable colleagues, including Daigo Ohtoyo and Etsuo Fujita. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.

Conclusion

Taku Hirosawa's contributions to the field of Fe-Ni-based superalloys demonstrate his commitment to innovation and excellence in materials science. His patents reflect a deep understanding of the complexities involved in producing high-quality superalloys, which are essential for various industrial applications.