METHOD FOR THE HOT FORGING OF A SEAMLESS HOLLOW BODY OF MATERIAL THAT IS DIFFICULT TO FORM, IN PARTICULAR OF STEEL

摘要

The invention relates to a method for the hot forging of a seamless hollow body of material that is difficult to form. It is proposed that the hot forging is performed with a degree of forming, with respect to the cross section to be formed, in the forging section with ln(AO/A1) of less than 1.5 and a method-related form changing rate of less than 5/s, where AO is defined as the local cross-sectional area of a hollow body to be forged in m2 and A1 is defined as a local cross-sectional area of the finished hollow body in m2 and the form changing rate is defined as the maximum rate of the hollow body to be forged in m/s with respect to the outside diameter of the finished-forged hollow body in m.