Kensai Shitani

Title: Kensai Shitani: Advancing Austenitic Stainless Steel Processing

Introduction

Kensai Shitani is an inventor associated with Nippon Steel Corporation in Hikari, Japan. His patent work addresses the processing of austenitic stainless steel with high molybdenum content, aiming to improve corrosion resistance and prevent cracking during hot working.

Latest Patents

Shitani is associated with 1 patent, titled “Process for Preparation of Austenitic Stainless Steel Having Excellent [property].” The invention addresses alloy-element segregation, particularly of molybdenum and chromium, in continuously cast steel slabs. Such segregation can promote sigma-phase precipitation during cooling, contributing to cracking during hot working and reduced corrosion resistance in the finished product.

The process controls the molten steel’s superheat during casting to at least 25°C, with the goal of keeping the equiaxed-zone ratio below 25%. It also specifies controls for soaking and hot-rolling times, as well as annealing conditions. Together, these measures are intended to improve pitting resistance and prevent cracking during hot working.

Career Highlights

Shitani’s documented patent contribution focuses on steelmaking and materials processing. The invention links casting conditions and subsequent heat treatments to the performance of austenitic stainless steel products.

Collaborations

The patent lists Masayuki Abe and Masanori Ueda as Shitani’s coworkers. Their shared work concerns improving the production and properties of high-molybdenum austenitic stainless steel.

Conclusion

Kensai Shitani’s patent describes a coordinated approach to casting and heat treatment that aims to reduce cracking and enhance the pitting resistance of austenitic stainless steel.