Influence of chemical and physical heterogeneity of the ingot in weight 24,2 t from steel 38ХН3МФА on mechanical properties of tubular billets

It is carried out the research of liquation and physical heterogeneity in large forge ingot from construc-tional steel. Mechanical properties and a chemical compound of metal on various sites of lengthy billets are certain. On forgings of pipe and shaft types the greater difference in the carbon contents on the ends of the billets, caused by volumetric liquation of elements in initial ingot is observed. This distinction in the carbon contents considerably complicates the choice of thermal processing mode, in particular, of temper temperatures, and reception of equal and stable values of mechanical properties during the length of finished products.