Surface hardening is also known as surface hardening, which is a method that produces a tough layer on the metal surface by some other metal alloy which is mainly more durable. Low-carbon steel is often coated with a stronger, more durable metal alloy. This surface hardening process is typically done after the part is in its final shape. The content of hardening elements of the bars, which are later used in pattern welding or other similar processes, can also be determined. Generally, the procedure is followed for parts that generally require a more wear-resistant surface that is internally strong to withstand heavy loads.

In the case of high carbon steels, when carburized, the hardness penetrates into the core and causes brittleness. This is the procedure where the metal surface is chemically changed starting with a high carbide or nitride content. The core of the material is not chemically affected. As it is heat treated, the high carbon surface reacts hardening and the core becomes hard. Components that undergo this case hardening process include: cardan joints, camshafts, linkage components, drive pinions, shafts and axles. In many of these cases, the surface that requires hardening is selectively hardened, leaving most of the part in its original state.

Cemented Component Applications:

1. Power Generation: Case-hardened components are generally used for gear wheels and other large components that have to withstand both wear and stress, such as in hydroelectric power plants, steam turbine gears in power plants, or drilling rig drives and wind. turbine generators.

2. Transportation: Generally, these hardened components are used in all motor-driven vehicles, including race cars, trucks, or even ocean-going vessels.

3. General Mechanical Engineering: Steel rolling equipment, heavy-duty transmissions, forging presses, earth-moving equipment, and heavy construction cranes require case-hardened materials. For these applications, the hardened materials used exhibit a combination of strength and fatigue resistance.

4. Another common application on which the process is carried out is screws, especially self-drilling ones. To drill, forming threads and drill bits must be harder than the material to be drilled, so the process is done on screws. Cutting and threading of other materials such as steel is also carried out.

Steel Case Hardening

In the metal skin, carbon is penetrated to create mild steel that has an outer shell with carbon as the core. The mild steel is then heated to a particular temperature until it turns bright red. For the formation of the outer surface, the mild steel is immersed in a carbon compound, however, it requires several immersions and reheating. This procedure will produce on the skin above the metal that is rich in carbon.

The main forms of this process are:

1 cyanide

2 nitriding

3 Carburation