Location History:
- Kimitsu, JA (1976)
- Kimizu, JP (1986)
- Kimitsu, JP (1978 - 1993)
- Chiba-Ken, JP (1998)
- Chiba Prefecture, JP (2001)
- Chiba, JP (2001)
- Futtsu, JP (1998 - 2003)
Company Filing History:
16 out of 3,563 
1 out of 1 
4 out of 832,891 Years Active: 1976-2003
Title: Innovations of Hiroshi Tamehiro in Steel Technology
Introduction
Hiroshi Tamehiro, an accomplished inventor based in Futtsu, Japan, has made significant contributions to the field of steel technology, with a remarkable portfolio of 21 patents. His pioneering work focuses on developing ultra-high strength steels suitable for demanding applications, especially in low-temperature environments.
Latest Patents
Among his latest patents, Tamehiro has introduced a super-high-strength line pipe that exhibits excellent low-temperature toughness. This innovative pipe demonstrates a tensile strength of at least 900 MPa, exceeding the API standard. The invention outlines a production method involving the shaping of a steel plate into pipe form, where arc welding is employed for seam portions. The strength parameters specified for the base steel and weld metal result in a robust product that mitigates cracking during pipe expansion.
Another notable patent by Tamehiro involves the creation of ultra-high strength steel featuring exceptional ultra-low temperature toughness. This steel, with a tensile strength of around 930 MPa, consists predominantly of fine-grained microstructures. The method of production includes precise heating, hot rolling, and controlled quenching, showcasing Tamehiro’s innovative approach to enhancing steel properties through meticulous engineering.
Career Highlights
Hiroshi Tamehiro has gained valuable experience working with significant companies, including Nippon Steel Corporation. His extensive knowledge and practical expertise in steel metallurgy have enabled him to drive advancements in the industry, particularly in the development of materials that meet stringent performance criteria.
Collaborations
Throughout his career, Tamehiro has collaborated with distinguished professionals, including Takuya Hara and Hitoshi Asahi. These partnerships have fostered a collaborative atmosphere that emphasizes innovation and the continual enhancement of steel technologies, contributing to the success of their collective research and development efforts.
Conclusion
Hiroshi Tamehiro remains a key figure in the field of steel technology, with a focus on innovations that enhance the performance of materials in challenging conditions. His contributions, reflected in his numerous patents, continue to influence the industry and inspire future advancements in steel production and application.