Borizing

Thermal chemical surface treatment for ferrous metals

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Industries where these treatments are often used:

Borizing is a thermal chemical surface treatment for ferrous metals resulting in a very hard and wear-resistant iron boride surface.

This treatment is very well suited for parts that are exposed to abrasive or adhesive wear and tear but which do not have to be very corrosion-resistant. In principle, all ferrous metals can be treated in this fashion, but it is important to realize that the silicon content should not exceed 1% and that the aluminium content must remain below 0.005%.

Cold welding problems will be reduced. A reasonable degree of corrosion resistance is obtained against alkaline and non-oxidizing acid conditions as well as good resistance against cavitation. Products often treated in this fashion include slider cutoff valves for the chemical industry, dosage screws, rotating heads, tools for the glass industry and wear-resistance plates.

Characteristics of the borizing treatment:

  • Diffusion thickness: 10-300 µm
  • Applicable up to temperature of 500°C
  • Surface hardness: 1600-2000 Micro Vickers
  • Effective bonding due to jagged shape of boride surface.
  • Core hardening possible during and after borizing treatment
  • Maximum dimensions: 3200x2000x900mm, other dimensions on special request