Process for heat treating metallic workpieces and materials comprises transporting the products to be treated through an annealing furnace, introducing hydrogen as protective and reaction gas, and feeding nitrogen openings as inert gas

摘要

Process for heat treating metallic workpieces and materials comprises transporting the products to be treated on a conveying belt through an annealing furnace having a coupling box and fired with fossil fuels, preferably natural gas/fuel burners, introducing hydrogen as protective and reaction gas into the coupling box, and feeding nitrogen into the inlet and outlet openings as inert gas. Hydrogen is used as a fuel gas for heating the furnace.