Steel can be heat treated to produce a wide range of microstructures and properties. Generally, heat treatment uses phase transformation to change the microstructure of solid state during heating and cooling.
What Is Heat Treatment Of Steel?
Explaination of heat treatment
In heat treatment, processing is usually heat treatment, which only changes the structure of steel. During the thermal mechanical treatment of steel, the shape and structure of steel components will also change. During the thermochemical process of steel, the surface chemistry and structure of steel will change.
hermomechanical treatment processes are also important treatment methods for steel heat treatment, and these methods are being considered in the field of heat treatment. The heat treatment process requires strict control of all factors affecting the heating and cooling of steel. The atmosphere of the heating furnace will also affect the state of the steel being heat treated.
Improvements of metal properties
Heat treatment is a kind of heat treatment process, which can realize three main improvements of metal casting material property:
1. Improve mechanical property
2. Reduce residual stress
3. Enhanced corrosion resistance
3 factors effect heating rate
The heating rate of parts depends on several factors. These factors are below.
(i) the thermal conductivity of the steel,
(ii) the state of the steel,
(iii) the size and cross-section of the steel.
Why We Need To Heat Treatment For Steel?
As mentioned above, heat treatment is used to achieve various desired results of metal castings. Heat treatment can also be designed to reduce hydrogen content, simulate service conditions, restore mechanical properties, and reduce stress after welding of the project. These different results are achieved by different heat treatment processes. The primary goal of heat treatment is to meet customer specifications and industry standards.
8 Methods To Be Safe During Heat Treatment
1. Workers must wear heat-resistant suits. Such as protective clothing, gloves, safety glasses and masks to prevent exposure to hot oil, which will burn the skin.
2. Before igniting the furnace, ensure that the air switch, exhaust fan, automatic shut-off valve and other safety precautions are in place.
3. Make sure there is enough coolant for operation. The coolant will absorb the heat released during metal cooling, but if the coolant is insufficient, the metal will not be able to cool at the best speed.
4. Ensure that the quenching area has sufficient ventilation to maintain the required oil mist level.
5. When igniting the furnace, follow the instructions provided by the manufacturer.
6. Do not stand directly in front of the fuel oil or gas stove when igniting it.
7. Before we begin to heat-treatment operation, Please ensure that the quenching oil is not contaminated by water. Contact of water with quenching oil may cause explosion.
8. Ensure that the quenching solution is mixed with appropriate bactericide or bacterial inhibitor.