Metal Spraying, Hard Facing and Surface Coating for Wear Resistance and Repair

Actis (UK) Ltd

Unit 27, Hamilton Road, Sutton in Ashfield,

  Notts, NG17 5LD  United Kingdom

Tel 01623 511542     Fax 01623 553542

e-mail actisuk@aol.com


 

 

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Pumps Repair:

Food Industry

Coatings:

 

 

 

 

Uniform coatings of nickel and cobalt alloys offer the engineer a range of coatings that will resist wear by as much as 6 times that of the parent metal due to the formation of wear resistant carbides (cobalt and tungsten carbide) that lie within the matrix of the coating.
Fused Coatings Provide Protection from:

Wear & Abrasion

The Cobalt and Tungsten Carbide particles in fused coatings offer excellent resistance to wear and abrasion.

Impact Damage

The metallurgical bond ensures a high hot hardness and high resistance to impact damage

Corrosion

Fusion produces very dense coatings that show no porosity and therefore they produce excellent resistance to corrosion

Application Methods

These coatings are applied using the oxygen/gas powder gun. Once the required depth of coating has been applied the coating is then fused to the substrate material with a gas torch.

Typical fusing temperatures are around 1040-1120°C. At this temperature the coating melts partially and so reacts with the base material to form a very strong metallurgical bond (comparable with some types of welding).

The coatings range in hardness from Rc30 to Rc65

Typical Applications

Pump Sleeves, bodies, rotors and shafts.

Vacuum Fusing

Irregular shaped components such as pump bodies and rotors can be fused in a vacuum oven. The increased control of the heating and cooling process produces excellent pore free coatings which require a minimum of machining to achieve finished sizes.

Rebuilding worn bearing and seal areas rather than scrapping shafts can enhance the component’s service life and reduce maintenance cost and downtime.

This cost effectiveness of this coating method has achieved wide recognition in the food, chemical, mining and mechanical engineering industries.

 

 

 

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Last modified: October 30, 2001