Annealing of work pieces of hypereutectoid grades of steels

Abstract

The process of heat treatment (homogenization) of workpieces before rolling has been developed, the homogenization annealing of hypereutectoid grades of steels in rolling production has been improved. Because of the improvement, it was possible to combine the process of heating to the temperature of plastic deformation and the process of homogenization of workpieces. In particular, the optimal mode of heating and holding at certain temperatures in a pass‑through heating furnace was determined in order to reduce the carbide heterogeneity (liquation) of steel and reduce costs. Homogenization is a technological process carried out over a two‑ or multiphase system, during which the degree of heterogeneity of the distribution of carbide phases over the volume of a heterophase system decreases.

Keywords

• heating furnace
• heat treatment
• annealing
• homogenization
• carbide heterogeneity
• hypereutectoid steel grades
• bearing steels