Toshio Okitsu

Title: Innovations of Toshio Okitsu

Introduction

Toshio Okitsu is a notable inventor based in Kitakyushu, Japan. He has made significant contributions to the field of engineering, particularly in the development of advanced materials and manufacturing processes. With a total of 2 patents to his name, Okitsu's work has had a considerable impact on the industry.

Latest Patents

One of his latest patents is for a die casting cylinder, which showcases his innovative approach to material science. Another significant invention is a high-chromium compound roll. This compound roll is composed of a shell made of high-chromium cast iron and a core made of cast or forged steel. The shell is designed to have a large residual compressive stress, which effectively prevents cracks from penetrating into its depths, thereby reducing the risk of spalling. The high-chromium cast iron shell has a specific composition that includes 2.0-3.5% C, 0.5-1.5% Si, 0.4-1.5% Mn, 8-25% Cr, 0.5-3.0% Mo, and 1.5% or less Ni, with the balance being essentially Fe for hot rolling. For cold rolling, the composition is slightly different, featuring 2.5-3.5% C, 0.5-1.5% Si, 0.4-1.5% Mn, 0.5-3.0% Ni, 8-25% Cr, and 1.0-5.0% Mo. The shell's Shore hardness is 70 or more for hot rolling and 90 or more for cold rolling, while the core's tensile strength and elongation are 55 kg/mm² or more and 1.0% or more, respectively. This innovative compound roll can be manufactured using a shell casting method.

Career Highlights

Toshio Okitsu is currently employed at Hitachi Metals, Ltd., where he continues to push the boundaries of material innovation. His work has been instrumental in enhancing the performance and durability of industrial components.

Collaborations

Throughout his career, Okitsu has collaborated with several talented individuals, including Yoshikazu Sano and Michio Haga. These partnerships have fostered a creative environment that has led to groundbreaking