What is Boronizing process?
Boronizing heat treatment, also known as boriding, is a case hardening diffusion process where boron atoms are diffused into the surface of a metal component. This forms hard, metal-boride compound layers under the surface of a component.
Why Surface treatments of boron are necessary?
Results indicated that the presence of boron coating on metallic materials improved their microhardness and corrosion resistance.
Which substrate is suitable for Boronizing?
Other metals that are suitable for boronizing are e.g. cobalt and nickel and any hard metals containing these elements in their substrate.
What is flame hardening?
Flame hardening is a heat treatment process where oxyfuel gas flames are directly impinged onto the gear-tooth surface area to be hardened which is then subjected to quenching. It results in a hard surface layer of martensite over a softer interior core. Its cost is considerably less than induction hardening.
What is the process of nitriding?
nitriding, process for hardening the surface of steel objects by introducing nitrogen (N) into it, where it combines with iron and other alloying elements to form hard metallic nitrides.
Why carburizing is done for steel?
Carburizing increases strength and wear resistance by diffusing carbon into the surface of the steel creating a case while retaining a substantially lesser hardness in the core. This treatment is applied to low carbon steel parts after machining, as well as high alloy steel bearings, gears, and other components.
What are three types of carburizing?
There are three types of carburising commonly used:
- gas carburising.
- liquid carburising (or cyaniding)
- solid (pack) carburising.
How is steel nitrided?
Nitriding steel is produced when steel is subjected to the nitriding process. In the nitriding process, nitrogen is diffused into the base steel to make the surface harder. This diffusion takes place at relatively low temperatures near 524°C (975°F).
Why nitriding is done?
The main objectives of nitriding are to increase the surface hardness of the material, as well as its wear resistance, fatigue life, and corrosion resistance [30], which are achieved by the presence of the nitrided layer.