Company Filing History:
Years Active: 1979
Title: John N Polakowski: Innovator in Hot-Dip Coated Steel Strip Technology
Introduction
John N Polakowski is a notable inventor based in Chesterton, IN (US). He has made significant contributions to the field of materials engineering, particularly in the development of hot-dip coated steel strips. His innovative approach has led to advancements in the quality and performance of steel products.
Latest Patents
Polakowski holds a patent for a "Drawing quality hot-dip coated steel strip." This invention involves a process for producing a low carbon aluminum killed steel strip through conventional steel strip forming and continuous hot-dip coating procedures. The process maintains the hot rolled coiling temperature within a range of 1250°F to 1300°F. The cold rolled steel strip is then continuously heat treated on a Sendzimir-type continuous hot-dip coating line at temperatures between 1850°F and 1950°F. This is followed by cooling the strip to the temperature of the hot-dip coating bath and immersing it in a hot-dip galvanizing or aluminum coating bath, followed by conventional annealing. The resulting microstructure is characterized by spaced islands of fine pearlite and fine ferrite, surrounded by areas of large ferrite grains. The typical properties of the produced steel strip include a Rockwell B hardness of about 47, an average lower yield strength of about 32 KSI, an average ultimate tensile strength of 50 KSI, and an average total elongation percent in two inches of about 40 percent.
Career Highlights
Polakowski is associated with Inland Steel Company, where he has applied his expertise in materials science to enhance product quality. His work has been instrumental in advancing the manufacturing processes of steel products, contributing to the company's reputation for innovation in the industry.
Collaborations
One of his notable collaborators is Ram S Patil, with whom he has worked closely to develop and refine his patented technologies. Their partnership has fostered a collaborative environment that encourages innovation and the sharing of ideas.
Conclusion
John N Polakowski's contributions to the field of hot-dip coated steel strip technology exemplify the impact of innovative thinking in materials engineering. His patent and work at Inland Steel Company highlight the importance of continuous improvement in manufacturing processes.