Tetsuya Hironaka

Title: Tetsuya Hironaka: Innovator in Bearing Technology

Introduction

Tetsuya Hironaka is a notable inventor based in Kashiba, Japan. He has made significant contributions to the field of bearing technology, particularly through his innovative patent. His work has implications for various industries that rely on high-performance bearings.

Latest Patents

Hironaka holds a patent for a bearing constituent member, a method of manufacturing this member, and a rolling bearing. The patent describes a bearing constituent member that includes a base material made of steel and a carbonitrided layer on the surface. The steel composition includes 0.3 to 0.45 mass % of carbon, 0.5 mass % or lower of silicon, 0.4 to 1.5 mass % of manganese, 0.3 to 2 mass % of chromium, 0.1 to 0.35 mass % of molybdenum, 0.2 to 0.4 mass % of vanadium, with the remainder being iron and unavoidable impurities. The surface Vickers hardness at a depth of 50 micrometers from the rolling sliding surface is between 700 to 800, while the internal hardness ranges from 550 to 690 in terms of Vickers hardness. Additionally, the amount of residual austenite from the surface to a depth of 10 micrometers is at least 30 vol %.

Career Highlights

Throughout his career, Hironaka has worked with prominent companies such as Jtekt Corporation and Nippon Steel Sumitomo Metal Corporation. His experience in these organizations has allowed him to refine his expertise in bearing technology and contribute to advancements in the field.

Collaborations

Hironaka has collaborated with notable coworkers, including Takashi Sada and Kohei Kanetani. Their joint efforts have likely played a role in the development of innovative solutions in bearing technology.

Conclusion

Tetsuya Hironaka's contributions to bearing technology through his patent and career experiences highlight his role as an innovator in the field. His work continues to influence the industry, showcasing the importance of advancements in bearing design and manufacturing.