Kyono Yasuda

Title: Innovations of Kyono Yasuda in Steel Material Technology

Introduction

Kyono Yasuda is a prominent inventor based in Fukuyama, Japan, known for his significant contributions to the field of steel materials. With a total of seven patents to his name, Yasuda has made remarkable advancements in the production and composition of steel materials for line pipes.

Latest Patents

Yasuda's latest patents include a steel material for line pipes and methods for producing the same. The steel material features a specific composition that ensures high performance. The metallic microstructure at a ⅛-plate thickness position below the surface consists of 85% or more bainite, 10% or less polygonal ferrite, and 5% or less martensite-austenite constituent. The compressive strength of this steel material reaches 340 MPa or more, even at a temperature of −10° C. or less, where a percent ductile fracture measured in a DWTT test becomes 85% or more.

The method for producing this steel material involves heating the steel to a temperature between 1000° C. and 1200° C. Hot rolling is performed with a cumulative rolling reduction ratio of 60% or more in a non-recrystallization temperature range. Accelerated cooling is then applied at a rate of 10° C./s or more, followed by reheating to achieve optimal properties.

Career Highlights

Kyono Yasuda is currently associated with JFE Steel Corporation, where he continues to innovate in steel technology. His work has significantly impacted the industry, particularly in enhancing the performance and durability of line pipes.

Collaborations

Yasuda has collaborated with notable coworkers, including Nobuyuki Ishikawa and Daisuke Mizuno, contributing to the advancement of steel material technologies.

Conclusion

Kyono Yasuda's innovative work in steel materials has led to significant advancements in the production and performance of line pipes. His contributions continue to shape the future of steel technology.