The surface boride may be in the form of either a single phase or a double phase boride layer. With ferrous materials, the boride layers attain a hardness of between 1500HV to 2300HV. Boronizedmetal parts are extremely wear resistant and will often last two to five times longer than components treated with conventional heat treatments such as Hardening, Carburizing, Nitriding, Nitrocarburizing.
1. High hardness (1300-2200 HV in ferrous materials)
2. High resistance to temperature (approx. 650˚ C)1. High hardness (1300-2200 HV in ferrous materials)
3. Increases resistance to acids (especially Hydrochloric acid)
4. Reduced coefficient of friction (0.4)
5. Boronized layer can be polished to a high degree of surface finish
6. Reduced tendency to cold weld with scuff resistance
7. Suitable for a broad range of materials
8. Selective boronising process is possible on the component.
9. Can be uniformly applied to irregular shapes
10. Post heat treatment is possible after boronising.
11. Uniform case depths of diffusion layers are controllable.
A monophase Fe2B layer with a tooth-shaped morphology is generally suitable for industrial applicationbecause of the difference between the specific volume and coefficient of thermal expansion of boride and the substrate. Boron rich upper phase FeB (containing approximately 16. 23 wt. % B) is not desirable because FeB is more brittle and less tough than Fe2B (containing approximately 8. 83 wt. % B) . The boronizing results in some considerable improvements in the surface such as resistance to wear, fatigue, corrosion, and high temperature oxidation.