Heat Treatment of Metals: An Ultimate Guide

by John Heine Foundry Shop

In material science, the heat treatment method is a series of operations that includes heating of metals like steel, copper, aluminium to a specific temperature to melt it and then cooling it to solidify. 


The heat treatment process is performed to change the physical structure and mechanical property of any metal to be more useful, serviceable, and safe for future purposes. In this heat treatment Australia method, any metal can be made robust, stronger, and resistant to break. However, heat treatment can also make metals softer and more malleable.  

Different Heat treatment Methods, Melbourne, Australia  


It is the process that is just the opposite of hardening. It is used to relieve the stress, soften the material, enhance flexibility, or bring required changes in properties such as machinability and dimensional stability.   

Here, the metal gets heated up to 30° to 50° or at critical temperature for 3-4 minutes to make it suitable for fabrication. One thing to remember the critical temperature depends upon the carbon percentage of metal. After heating the metal to a specific temperature, it is allowed to cool down slowly in the oven itself.  


This type of heat treatment in Australia is only applicable to ferrous metals like steel. It is quite the opposite of annealing, and here it is heated to an upper critical temperature for 15 minutes and removed from furnace to air-cooled. The objective of normalizing is to relieve the internal stress of metals from heat treatment, machining, forging, casting or welding. In most cases, metal breakage results from uncontrolled stress; normalizing metals like steel reduces the chances of such failure and ensures the project's success.  

Quenching or Hardening  

The goal of hardening metals is to provide strength at the same time making them stronger. However, hardening not only enhances the strength of metals but also reduces ductility that making the metal more brittle. It is usually after the metal is shaped into the final stage as the desired component. The ability of hardening of metals increases alongside the carbon Acquisition of metals. After hardening, the metal is needed to tempered to remove excessive brittleness.   


The tempering process is used to eliminate or reduce the brittleness of quenched steel. In this process, the hardened metal is reused, it is reheated below or close to the lower critical temperature and allowed to cool to attain the following objectives.

- Decrease brittleness of the metal.
- Eliminate internal stress generated due to the hot and cold process.
- Improve the capability of steel to resist shock and fatigue.  


In the end, the heat treatment, Melbourne Australia process is used to technically alter the mechanical property of metal without disturbing chemical composition. If you want to perform a heat treatment process, visit John Heine. It is a premier foundry shop in Australia that produces low volumes of ferrous castings and industrial components for mining, power generation, and general engineering parts.  

It delivers high-quality parts that match clients' expectations. Visit John Heine for high-quality, hard-wearing components made up of high chrome irons under the Heinehard brand.  

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About John Heine Junior   Foundry Shop

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Created on Dec 6th 2021 02:42. Viewed 169 times.


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