This inventor holds 2 USPTO granted patents. Top assignee: Nippon Steel Corporation. Active years: 1978-1984.
Location History:
- Himeji, JA (1978)
- Tokai, JP (1984)
Company Filing History:
Years Active: 1978-1984
Title: Kichi Nakazawa: Innovator in Steel Production
Introduction
Kichi Nakazawa is a prominent inventor based in Himeji, Japan. He has made significant contributions to the field of steel production, particularly in the development of methods for producing high-quality cold-rolled steel sheets. With a total of 2 patents, Nakazawa's work has had a lasting impact on the industry.
Latest Patents
One of Nakazawa's latest patents is a method for producing a cold-rolled steel sheet that exhibits excellent properties. This method involves continuously casting, hot-rolling, cold-rolling, and continuously annealing Al-killed steel. It is known that coiling a hot-rolled strip at a temperature between 630°C and 710°C allows for satisfactory precipitation of AlN during the hot-rolling step. However, when using the direct-rolling method to produce a cold-rolled strip, achieving satisfactory precipitation of AlN becomes challenging. Nakazawa's invention addresses this issue by utilizing an extremely high coiling temperature of at least 780°C, which effectively prevents aging due to AlN precipitation. Additionally, the carbon content of the continuously cast slab is limited to a maximum of 0.005% to prevent the occurrence of orange peel. This innovative approach not only conserves heat but also ensures excellent properties of the cold-rolled steel strip.
Another significant patent by Nakazawa is a method for heating a silicon-containing steel slab in a walking-beam furnace. This method treats steel slabs containing 2.5% to 4% silicon, heating them to a temperature not lower than 1260°C. The process involves charging the slabs into the continuous heating furnace, transferring them using walking-beams, and ensuring that the contact time with fixed beams is minimized. This method also includes separating adjacent slabs to allow for the remelting of solidified slag, enhancing the efficiency of the heating process.
Career Highlights
Kichi Nakazawa has built a successful career at Nippon Steel Corporation, where he has been instrumental in advancing steel production technologies. His innovative methods have contributed to the company's reputation as a leader in the steel industry.
Collaborations
Throughout his career, Nakazawa has collaborated with notable colleagues, including Seiryo Hatae and Hiroaki Toki. These partnerships have fostered a collaborative environment that encourages innovation