جلال خطاب 
معاملات حرارية علي اساس علمي

Full Annealing

Full Annealing

Full annealing consists of heating steel to above the upper critical temperature and maintaining the temperature for a specified period of time, then allowing the material to slowly cool down inside the furnace.

Normalising

Normalising is a heat treatment of steel to change the grain size to improve the physical properties of the steel in which the steel is heated to a temperature that turning its internal structure to austenite and it will be left for a certain time and cooling it down.

Stress Relief

Stress relieving is applied to steel to remove internal residual stresses generated by prior manufacturing processes such as machining, cold rolling and welding.
This process is performed in the same manner as the Tempering, but for a longer period and a slow cooling in the oven.