Location History:
- Chiba-ken, JP (1997)
- Chiba, JP (1997)
- Tokyo, JP (2019 - 2021)
Company Filing History:
8 out of 3,568 
1 out of 1,102 Years Active: 1997-2021
Title: Akifumi Kawana: Innovator in Steel Wire Technology
Introduction
Akifumi Kawana is a prominent inventor based in Chiba-ken, Japan. He has made significant contributions to the field of materials science, particularly in the development of steel wire and wire rod technologies. With a total of 9 patents to his name, Kawana's work has had a lasting impact on the industry.
Latest Patents
Kawana's latest patents focus on the composition and structural properties of steel wire and wire rods. One of his notable inventions describes a predetermined composition where the carbon (C) content is critical. When the C content is between 0.35% and 0.65%, the volume fraction of pearlite must be at least 64 × (C %) + 52%. For C content greater than 0.65% and up to 0.85%, the volume fraction of pearlite is required to be between 94% and 100%. Additionally, the structure of the remaining portion consists of proeutectoid ferrite and bainite. Kawana's patents also specify that within a depth of 1.0 mm from the surface, the volume fraction of pearlite blocks with an aspect ratio of 2.0 or more should be between 70% and 95%. Furthermore, the volume fraction of pearlite with a specific angle between the axial direction and lamellar direction must be 60% or more.
Career Highlights
Throughout his career, Akifumi Kawana has worked with leading companies in the steel industry, including Nippon Steel Corporation and Nippon Steel Sumitomo Metal Corporation. His expertise in materials science has allowed him to contribute to various innovative projects and advancements in steel technology.
Collaborations
Kawana has collaborated with notable colleagues such as Hiroshi Oba and Ikuo Ochiai. Their combined efforts have furthered research and development in the field of steel wire technology.
Conclusion
Akifumi Kawana's contributions to the field of steel wire and wire rod technology are significant and impactful. His innovative patents and collaborations with industry leaders highlight his role as a key figure in materials science.