METHOD OF MANUFACTURE OF BOILER TUBES MADE OF CARBON STEEL

摘要

A method of manufacture of boiler tubes made of carbon steel includes hot deformation of an ingot with regulated content of sulphides, oxides and silicates - not more than 3.5 points of each kind - and the temperature of its termination above critical point of the deformed steel Ac. An ingot of continuous casting is used and hot deformation is carried out by successive pressing in the broaching and extruding presses with a total traction 11-42 and completion of the deformation at a temperature above Acfor 330-.