NA-Mfg having approved heat treatment shop with sophisticated process and integrated testing laboratory.

The facilities provide complete heat treatment processes with the highest quality from integrated Sealed Quench Furnace setup and a modernized laboratory for products quality check and testing.

We are handling a variety of components requiring Hardening and Tempering ( Q&T ) , Case Hardening with case depth ranging from 0.20 mm to 2.50 mm case depth and Carbo-Nitriding. The following are some of the heat treatment facilities offered by us.

Induction heating is the heating process that is operated on the principle of electromagnetic induction. Induction hardening has several benefits over other hardening methods. It is easier to control because it is an electrical process rather than a combustion process. Another benefit is that it begins heating the surface of the material, rather than the core. This makes induction hardening an excellent option for case hardening. We are equipped with high frequency and low frequency induction hardening machines to support the post processing.

Hardening is a process used to improve the hardness and tensile strength of a metal alloy. This process involves using a rapid quench technique to change the microstructure of the metal while imparting increased strength. In contrast to case hardening, which strengthens only the outer layer of the material, through-hardening strengthens the entire cross-section of the alloy.

The process of annealing is done for the recrystallization of the metal. During the process of process annealing the new equiaxed, strain-free grains nucleate at high-stress regions in the cold worked microstructure. The hardness and strength of the metal will decrease whereas the ductility of the metal will increase.

The main purposes of the normalizing heat treatment on metals are:
To remove structural irregularities or impurities and defects from the metal. To improve ductility that has been lost in some metal processing.

Tempering is a process of heat treating, which is used to increase the toughness of iron-based alloys. Tempering is usually performed after hardening, to reduce some of the excess hardness, and is done by heating the metal to some temperature below the critical point for a certain period of time, then allowing it to cool in still air.

For nonferrous alloys, solution annealing is a preliminary step to the hardening of the alloys. The solution heat treatment involves heating the alloy to a high enough temperature to drive the alloying elements into a solid solution, yielding a metastable, supersaturated solid solution. These alloys are then precipitation hardened (also known as age hardening)

Carbonitriding is a case hardening heat treatment that introduces carbon and nitrogen in the austenite of steel conducted from 1073 K to 1173 K. This treatment is similar to carburizing in that the austenite composition is changed and high surface hardness is produced by quenching to form martensite

The carburizing heat treatment process for machined parts and stampings starts with austenitizing the heat-treat load in a controlled, carbon-rich atmosphere. Components remain proportionate to the carburized case hardening depth requirement for a length of time. The parts are then quenched to harden the developed case.

Followed by the heat treatment the parts will be tested in the various levels before moving to the next phase of the process. Our manufacturers have very sophisticated testing lab, where we can check the mechanical properties and metal structures.