Takero Arima

Title: Takero Arima: Innovator in TIG Welding Technology

Introduction

Takero Arima is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of welding technology, particularly in the development of methods for welding Cr-Mo steel pipes. His innovative approach has implications for various industrial applications, especially in power generation.

Latest Patents

Takero Arima holds a patent for a method of TIG welding 1.25 Cr-0.5Mo steel pipe. This invention addresses the challenges associated with welding steel pipes of a wall thickness of 13 mm or less. The specific composition of the steel includes C: 0.03-0.10 wt %, Si: 0.50-1.00 wt %, Mn: 0.30-0.60 wt %, P ≤ 0.007 wt %, S ≤ 0.020 wt %, Cr: 1.00-1.50 wt %, Mo: 0.45-0.65 wt %, Al: 0.002-0.010 wt %, and N: 0.002-0.010 wt %, with the remainder consisting of Fe and unavoidable impurities. This method allows for the effective omission of preheating and postheating treatments, which are typically necessary to prevent weld cracking and stress corrosion cracking. The steel pipe developed through this invention is particularly suitable for steam piping applications, such as STPA23 used in power generation plants.

Career Highlights

Takero Arima is associated with NKK Corporation, where he has been able to apply his expertise in welding technology. His work has contributed to advancements in the manufacturing processes used in the industry.

Collaborations

Some of his notable coworkers include Toshihiro Takamura and Yukio Nishino, who have collaborated with him on various projects within the company.

Conclusion

Takero Arima's contributions to welding technology, particularly through his patented method for TIG welding Cr-Mo steel pipes, highlight his innovative spirit and dedication to improving industrial processes. His work continues to influence the field and supports advancements in power generation applications.