This plastic, or permanent deformation, induced by the rolling process, causes not only a macroscopic change in product dimensions, but also a microstructural change resulting in work hardening. In the case of Ulbrich Specialty Strip Mill, the action we impart on our alloys in order to temper or harden them is work hardening through cold rolling.Ĭold rolling, a wrought metal process, induces cold work, or plastic deformation without preheating, by reducing the thickness of a strip metal coil. If we consider the annealed state, the state after which an alloy has been heated to above its recrystallization temperature and soaked until the desired grain size is achieved, to be the baseline for that alloy’s strength, tempering can be defined as acting upon the alloy in order to increase its strength beyond the annealed state. The most common connotation refers to a hardened state of material, or the act of hardening through tempering. The word “Temper” gets thrown around a lot in the metals industry.
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