Hardness for the annealing-process is listed normally on HRB scale, at the maximum value. this process is performed for refining grain size, improving strength, affecting electromagnetic properties and removing residual stress.  

There are heat-treating methods that have been developed for altering properties of an object`s portion, not the whole object. These comprise of cooling various alloy areas at different cooling rates, quick heating of alloys within localized areas and quenching through thermo chemical diffusion. Quenching can also be done by tempering various areas of the object […]

There are metals that fall under the classification of precipitation hardening. When quenching is performed upon some precipitation hardening-alloy, alloying elements of this alloy are trapped within solution, which results in soft metal. Performing aging for a solutionized-metal allow alloying elements for diffusing via microstructure & forming inter-metallic particles. Such particles nucleate & fall-out of […]

Heat treating is a process of heating or cooling metals and is used to alter their properties in order to obtain the desired shape and structure such as brittleness, hardness, and softness. The steps for achieving these things are consistent with all heat treatment processes. Heat treatment techniques include annealing, tempering, hardening, quenching, stress releasing […]