USE OF A Ni-BASE ALLOY FOR COMPOUND TUBES FOR COMBUSTION PLANTS

摘要

As tube material in waste incineration it has been found advantageous to use a composite tube wherein an inner tube component of a carbon steel or a low-alloy Cr-Mo-steel is metallurgically bonded to an outer tube component of Ni-Cr-Mo-Nb-Fe-alloy with an austenitic structure. The composite tube is fabricated by spraying finely distributed metal drops of the outer component onto the inner component in melt condition. After solidifying, the composite tube is then fabricated by joint extrusion.