Limited to some, but not all, steels, normalising can soften, harden or stress relieve a material, depending on its initial state. The objective of the treatment is to counter the effects of prior processes, such as casting, forging or rolling, by refining the existing non-uniform structure into one which enhances machinability/formability, in certain forms, meets final mechanical property requirements.
A primary purpose is to condition the steel so that, after subsequent shaping, a component responds satisfactorily to a hardening operation (e.g. aiding dimensional stability). Normalising consists of heating the suitable steel to a temperature typically in the range 830-950°C (at or above the hardening temperature of hardening steels, or above the carburising temperature for carburising steels) and then cooling in air. Heating is usually carried out in air, so subsequent machining or surface finishing is required to remove scale or decarburised layers.
In-house designed electric furnaces for carburising, hardening and tempering optimised for energy efficiency & uniformity.
GHTC have tight Quality & Process Control, Large Capacity, Scheduled Delivery, Caliberated Testing Machines, Test Reports and Efficient Management. We understand the principles of chemistry, heat transfer, metallurgy and the interactions between heat extraction rate and microstructure.
Focus on performance – wear resistance, core strength, distortion control not just numbers on paper.