A method of producing forged rectangular boards made of hollow ingots

摘要

Method for producing rectangular sheet, particularly large-sized, consisting in that it is carried out by hot forging of the hollow ingot, wherein the hollow ingot is cut head and a hollow ingot is Rožková mandrel on a hollow body with a desired thickness si1 wall thickness corresponding s.sub.3.n.pravoúhlé board. The hollow body is further compressed in the direction of radius so as to be wall main body in the direction of compression touch each other, and then cut them from both sides, e.g. flame, resulting in two identical rectangular plate thickness s.sub.3.n ..