A new industrial thermo-chemical procedure to modify the own structure of iron, steel and foundation with looks to increase its hardness (Machine-translation by Google Translate, not legally binding)

摘要

A new thermo-chemical industrial process for modifying the steel's own structure and cast iron in order to increase its hardness which is essentially characterized by metal treatment by a chemical composition containing at least one product intended to facilitate the cleaning of iron steel or casting which product is soda solvay in the proportion of 5 to 15% others intended to facilitate the penetration of the chemical composition to the innermost part of the metal mass to be treated, said products being sodium chloride and sulphate of soda in the proportion of 10 to 30% and others whose action is reduced to increase the hardness of the metal mass (steel iron or cast iron), said products being the potassium and iron cyanides in the proportion of 55 to 85% carrying out the treatment by raising the temperature of the composition and iron or steel casting until the metal is reddish in which state the iron is subjected steel or cast iron to a sudden cooling by immersing it in a bath of oil or oil water or cooling it by means of a current of air at room temperature. (Machine-translation by Google Translate, not legally binding)