Patent ID: 7828918

Claim:
A method for thermomechanical treatment of a round steel rod, said method comprising: deforming said steel rod in a single deforming step, coordinated with heat treatment of said steel rod, wherein said single deforming step, coordinated with heat treatment, includes, heating said steel rod to a heating temperature that is above a recrystallization temperature; equalizing the heating temperature of the steel rod over its length; causing said steel rod to be deformed by a single step of skew rolling while it remains substantially straight, such that a predetermined twisting of the material occurs in a marginal area of said rod and a desired deformation gradient is achieved over a cross section of the rod, whereby, after a critical degree of deformation is exceeded, dynamic recrystallization processes take place with test intensity in the marginal area; reheating the rod to a temperature above Ac3; and hardening and tempering the rod; wherein the structural distribution over the cross section of the finish-worked round rod leads to a property profile, which is adequate for the tension profile over the cross section in the case of flexural and/or torsional stress.