تقسية و تمتين الفولاذ العامل في درجات حرارة عالية

The heat treatment is used in order to obtain high quality of machine parts that are widely used in the bread making chains in furnaces at high temperatures and for long times. Stresses exist during the work of the machine parts, mainly shear stress, and compressive stress. Some heat treatments methodare applied to specimen from of steel St 52 and St 37 to determine the different chain parts.