Stress Relieving – Forging, rolling, cold working, non-uniform cooling cause internal stresses in a metal. This process is performed on forging components that are to be machined as normalizing improves the mach-inability of forged components. This increases the strength and hardness. Normalizing – Heating of alloy above critical temperature, soaking it at that temperature and cooling it in air is called normalizing. This increases the ductility and toughness but reduces the hardness. There are various types of heat treatment processes which are performed separately or as a combination to get the desired properties and micro structure after forging.Īnnealing – Heating of the alloy above critical temperature and allowing to cool in the furnace itself after switching off the furnace is called annealing. To improve magnetic properties by phase transformation, of the forged components To improve surface hardening, corrosion resistance, high temperature resistance by precipitation hardening To improve cutting properties of tool steels

To improve mach inability of forged components To remove residual internal stresses formed due to cold working by stress relief annealing To obtain fine grain size by re crystallization annealing, full annealing or Normalizing To increase strength, hardness and wear resistance Heat treatment is performed to obtain a desired micro structure and achieve certain physical, mechanical, magnetic or electrical properties.Ĭomponents produced by forging are heat treated to obtain desired micro structure and specified properties. Heat Treatment Process in Forging, Heat treatment is a process involving heating of a metal/alloy at a specific rate, holding it at a temperature for a period of time and cooling it at a specific rate.

Aluminum safe to heat to forge