Hiroshi Tsujimura

Title: Innovations of Hiroshi Tsujimura

Introduction

Hiroshi Tsujimura is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of materials engineering, particularly in the development of innovative methods for improving metal structures. With a total of three patents to his name, Tsujimura's work has had a profound impact on various industrial applications.

Latest Patents

One of Tsujimura's latest patents is a method for improving the quality of metal members through spot welding. This technique involves applying spot welding along a crack in an austenitic stainless steel structure without the use of welding material. By connecting the spot welds, the method allows for the melting and solidifying of the crack, resulting in a metal structure that is rich in delta ferrite or preventing the propagation of the crack by enclosing it within the austenitic stainless steel structure.

Another significant patent is his method and apparatus for water-jet peening. This innovative approach utilizes a pressurized water jet flow containing cavities, which is jetted through a specially designed nozzle. The water jet impinges against the surface of a metallic material immersed in water, causing the cavities to collapse and generating a local high pressure. This process induces tensile plastic deformation in the surface layer of the metallic material, effectively reducing residual tensile stress. Notably, this method can be applied even in environments with pure water, such as those found in nuclear reactors.

Career Highlights

Hiroshi Tsujimura has worked with prominent companies, including Hitachi, Ltd. and Hitachi Kyowa Kogyo Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in metal treatment technologies.

Collaborations

Throughout his career, Tsujimura has collaborated with esteemed colleagues, including Yasumasa Tamai and Koichi Kurosawa. These partnerships have fostered a collaborative environment that has led to innovative solutions in the field of materials engineering.

Conclusion

Hiroshi Tsujimura's contributions to the field of materials engineering through his innovative patents and collaborations highlight his importance as an inventor. His work continues to influence the industry and pave the way for future advancements in metal treatment technologies.