Company Filing History:
Years Active: 1988-1990
Title: Tsunemi Wada: Innovator in Steel Rail Manufacturing
Introduction
Tsunemi Wada is a notable inventor based in Tokyo, Japan, recognized for his contributions to the field of steel rail manufacturing. With a total of three patents to his name, Wada has developed innovative methods that enhance the strength and toughness of steel rails.
Latest Patents
Wada's latest patents include a method for manufacturing a high strength rail with good toughness. This method involves cooling a rail to the Ar₃ transformation point or less after hot rolling, followed by heating the cooled rail within the austenite temperature zone ranging from the Ac₃ transformation point to 950°C, and then cooling the heated rail. The chemical composition of the rail consists of 0.50 to 0.85 wt. % C, 0.50 to 1.50 wt. % Mn, 0.035 wt. % S or less, 0.10 to 1.00 wt. % Si, 0.035 wt. % P or less, 0.050 wt. % Al or less, with the balance being Fe and inevitable impurities. Another significant patent is a method for heat-treating a steel rail head. This method includes heating the rail head to the austenization temperature, cooling it with a hot water jet until the surface temperature drops below 420°C, and then further cooling it with an air jet to achieve a uniform and fine pearlite structure.
Career Highlights
Throughout his career, Wada has worked with prominent companies such as NKK Corporation and Nippon Kokan Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in steel manufacturing processes.
Collaborations
Wada has collaborated with notable coworkers, including Kozo Fukuda and Shinichi Nagahashi, who have also made significant contributions to the field.
Conclusion
Tsunemi Wada's innovative methods in steel rail manufacturing have made a lasting impact on the industry. His patents reflect a commitment to enhancing the quality and performance of steel products.