ACCELERATED CARBIDE SPHEROIDISATION AND REFINEMENT (ASR) OF THE C45 STEEL DURING CONTROLLED ROLLING

作者：Hauserova Daniela^*; Dlouhy Jaromir; Novy Zbysek

来源：Materiali in Tehnologije, 2014, 48(5): 797-800.

• accelerated spheroidisation
• refinement
• rolling
• C45 steel

Current industry trends include the search for cost- and energy-saving procedures and technologies. A new process has been discovered recently, which allows a significant refinement of ferrite grains and a carbide spheroidisation in a shorter time than in the case of conventional heat-treatment techniques. During this newly-developed ASR-based (accelerated spheroidisation and refinement) plastic deformation an accelerated spheroidisation and a refinement due to the heat treatment in the vicinity of the A(1) temperature occur.
Controlled rolling enables a production of the materials with a fine microstructure and better mechanical properties than conventional production processes. Accelerated carbide spheroidisation and refinement (ASR) is aimed to produce steel workpieces with a microstructure consisting of a fine-grained ferrite matrix and globular carbide particles. In carbon steels, this microstructure has higher yield strength and toughness than the conventional ferritic-pearlitic microstructure.
The presented paper describes the effect of the ASR process on the C45 steel. The pearlite morphology was influenced by forming it at the temperatures around critical temperature A(1) and an accelerated carbide-particle spberoidisation was achieved. The deformation increases the dislocation density and enhances the diffusion rate. Cementite globules form rapidly, within seconds or minutes at the most.

• 出版日期2014-10