Location History:
- Matsudo, JP (1997 - 1998)
- Chiba, JP (2004)
- Kashiwa, JP (2004 - 2018)
Company Filing History:
6 out of 149 
3 out of 42,508 
3 out of 1,641 
Years Active: 1997-2018
Title: **The Innovative Contributions of Hidekazu Tokushima**
Introduction
Hidekazu Tokushima, an esteemed inventor based in Kashiwa, Japan, has made significant advancements in the field of materials science. With an impressive portfolio of 12 patents, Tokushima has focused his research on iron-based sintered alloys, which have numerous applications in various industrial sectors.
Latest Patents
Tokushima's latest innovations include two notable patents. The first patent describes an iron-based sintered alloy for sliding members designed to enhance seizure resistance. This alloy composition consists of 10 to 30% copper, 0.2 to 2.0% carbon, 0.03 to 0.9% manganese, and 0.36 to 3.65% sulfur, with iron comprising the remainder along with inevitable impurities. The resultant structure features a matrix dominated by martensite, enhanced with dispersed copper phases and sulfide particles. The sulfide particles exhibit a volume percentage ranging from 1 to 30% relative to the matrix.
The second patent focuses on an iron-based sintered sliding member that comprises 0.1 to 10% copper, 0.2 to 2.0% carbon, 0.03 to 0.9% manganese, and 0.52 to 6.54% sulfur, balanced with iron and inevitable impurities. This innovation emphasizes the importance of maintaining a specific relationship between the percentages of sulfur and manganese, as indicated by the formulated equation. The metallic structure demonstrates the presence of pores and sulfide particles in a matrix that includes at least 50% martensite.
Career Highlights
Throughout his career, Hidekazu Tokushima has worked with prestigious companies such as Hitachi Powdered Metals Co., Ltd. and Hitachi, Ltd., where he honed his expertise in materials engineering. His contributions to the field have helped advance the understanding and application of sintered alloys in industrial components, particularly in contexts requiring enhanced durability and performance.
Collaborations
Tokushima's innovative journey was enriched by collaborations with fellow researchers and peers, including Hideo Shikata and Katsutoshi Nii. These partnerships underscore the importance of teamwork in driving technological advancements and achieving breakthroughs in the realm of materials science.
Conclusion
Hidekazu Tokushima’s contributions to the development of iron-based sintered alloys have positioned him as a key figure in materials innovation. His patents highlight the intricacies of alloy composition and the resulting improvements in performance, paving the way for future advancements in the industry. As an inventor, his work continues to inspire and influence ongoing research and development efforts in the field.