Location History:
- Yamaguchi, JP (1988 - 1995)
- Kuga-gun, JP (1997)
- Shin-Nanyo, JP (2006)
Company Filing History:
11 out of 342 
1 out of 34 Years Active: 1988-2006
Title: The Innovations of Takashi Igawa
Introduction
Takashi Igawa is a prominent inventor based in Yamaguchi, Japan. He has made significant contributions to the field of materials science, particularly in the development of advanced stainless steels. With a total of 11 patents to his name, his work has had a considerable impact on various industries.
Latest Patents
One of his latest patents is for an austenitic stainless steel that exhibits excellent fine blankability. This innovative steel composition includes (C+N) up to 0.060 mass %, Si up to 1.0 mass %, Mn up to 5 mass %, S up to 0.003 mass %, and a S/Mn ratio up to 0.003. The steel also contains 15–20 mass % Cr, 5–12 mass % Ni, Cu up to 5 mass %, and 0–3.0 mass % Mo, with the balance being Fe, excluding inevitable impurities. The patent specifies that the value Md, which represents the ratio of strain-induced martensite, should be controlled within a range of -60 to -10. The steel sheet is designed to achieve a hardness increase of 20% or more after cold rolling, measured as Vickers hardness. Additionally, the metallurgical structure of the steel sheet is optimized to have a grain size number of #8 to #11 in a finish annealed state, allowing for high dimensional accuracy in blanking and prolonged die life.
Career Highlights
Throughout his career, Takashi Igawa has worked with notable companies such as Nisshin Steel Co., Ltd. and Sanoh Kogyo Kabushiki Kaisha. His expertise in metallurgy and materials engineering has led to advancements that benefit manufacturing processes and product durability.
Collaborations
Takashi has collaborated with esteemed colleagues, including Yoshihiro Uematsu and Hiroshi Fujimoto. Their combined efforts have contributed to the development of innovative materials and technologies.
Conclusion
Takashi Igawa's contributions to the field of materials science, particularly in stainless steel innovations, have established him as a key figure in the industry. His patents reflect a commitment to enhancing manufacturing capabilities and product performance.