Boronizing

(Boriding)

Boronizing base materials will give an extremely hard surface to increase the material’s service life. Hard and wear resistant boride layers are created by the diffusing boron onto the surface base material. Boriding (boronizing) is especially effective for unalloyed and low alloyed steels (materials containing silicon and aluminium are not suitable). It creates an extremely hard surface which effectively reduces abrasion and erosion of the part. It also creates a lower coefficient of friction allowing higher flow rates. Boronizing increases resistance to abrasive wear, as well as reducing the coefficient of friction – providing improved resistance to cavitation. In the event of a lubricating film break, the boride layer provides excellent emergency running properties, even with high temperatures – up to 1000°C.

Boronizing is used in many industries including oil & gas, mining and agriculture.

Benefits:

  • Hardness of 1400-2800 HV (depending on base material)
  • Layer thickness of 10-250 microns (depending on base material)
  • Improved bond strength (adhesion) compared to conventional hard material coatings
  • Excellent resistance to abrasive wear
  • High resistance against adhesive wear
  • Improved resistance to cavitation
  • Excellent thermal stability
  • Self-lubricating properties even at high temperatures
  • Good stability at high temperatures

 

Typical Boronizing Applications:

  • Wellheads
  • Valve bodies, ball valves and valve seats
  • Check valves, gate valves
  • Tubings
  • Drilling equipment
  • Downhole components
  • Nuts and Bolts
  • Hold down rings
  1. Extremely hard surface which effectively reduces abrasion and erosion of the part. Also creates a lower coefficient of friction allowing higher flow rates.
  2. Iron Boride (Fe2B) increase molecular density.
  3. Retention of the original dimensional tolerances is critical for proper wetting, nesting and drift tolerances.

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