What is Borrowing? How to Apply?

Boriding is a thermochemical surface hardening technique that forms a boride layer by diffusion of boron atoms onto the metal surface at high temperatures. Boriding method increases the hardness, wear resistance and corrosion resistance on the surface of metals and alloys. Boriding is also a method applied to preserve these properties at high temperatures. In the boriding method, boron atoms enter the metal surface by diffusion and strengthen the material surface. Boriding method is a surface hardening technique applied mainly to iron-based alloys. Boriding method is a thermochemical surface treatment that can be applied to all steels. Boriding process can be applied to non-ferrous metals and alloys. During the boriding process, an extremely hard surface is formed and high wear resistance is achieved. During the boriding process, the oxidation resistance of the metal also increases.

How is Boring Done?

The boriding process is carried out at a temperature range of 700 - 1000°C for a period of 1 - 12 hours. The boriding medium can be solid, liquid, gas or plasma. The solid boriding medium contains ferrobor, amorphous boron and B4C. In the gas and plasma environment, there are Diborane (B2H6), Boron trichloride (BCl3) and Trimethylborane ((CH3)3B). Boriding is applied to iron alloys other than aluminum and silicon bearing steels. It is made into structural steels, surface hardened tempered steels, tool steels, stainless steels and air hardened steels. However, nickel-based alloys and cobalt-based alloys can also benefit from the boriding method. Boriding can be applied to nickel alloys to obtain hard surface wear resistance

Advantages of Boroning Technique

High surface hardness and low surface friction coefficient obtained by boriding process; It provides resistance to wear mechanisms such as adhesion, abrasion and surface fatigue. The hardness of the boron layer provides stability at high temperatures. Compared to other surface hardening processes, it is suitable for many steel boriding techniques. Boridified surfaces are resistant to moderate oxidation at high temperatures. The boriding process reduces the coefficient of friction and minimizes lubricant usage. The fatigue life of boridized material is high in oxidizing and corrosive environments.