The Machinery and Valve Repair and Overhaul Company „Masz-ZAP” Ltd.
Al. Tysiąclecia Państwa Polskiego 13,
24-110 Puławy
tel. +48 81 473 12 00 fax +48 81 473 12 01
info@maszzap.com.pl
Masz-ZAP » Spray metallization

Spray metallization

Thermal Wire Spray.

The coating material is in form of a wire.  It is fed continuously and melted by burning an acetylene-oxygen mixture using an FWS – 20 gun. Then, it is sprayed using compressed air onto a surface to be reclaimed.

Abrasive processing (sand blasting) is required prior to the thermal spray operation. In our offer, that process is carried out using a portable dust-free abrasive processing device.

The thermal spray process (commonly known as spray metallization) is characterized in that the base material is not partially melted, and the sprayed layer is adhesively bonded to the base.By using appropriate brushes at the tip of the head the abradant can be vacuumed and returned to a closed circuit where dusts are sucked out and segregated in a filter system.

The spray metallization process (commonly known as spray metallization) is characterized in that the base material is not partially melted and the sprayed layer is adhesively bonded to the base.

The basic aim of thermal spray is to apply a coating onto the worn-out surfaces of an operating machine to restore nominal dimensions of parts. Thermal spray is increasingly used in the manufacture of parts, making it possible to obtain high performance coatings (hardness as high as up to HRC 60-64, abrasion resistance, etc.) whose operating characteristics far exceed those of the base material of a part.

The wide range of wires suitable for thermal spray includes wires of various melting points, from tin to molybdenum.

Most often used are:

  • molybdenum,
  • babbitt,
  • bronze,
  • copper,
  • zinc,
  • aluminium,
  • low carbon steels and low-alloy steels, and many other.

 

Spraying babbitt on the internal and the external surfaces of a part being reclaimed:

  • internally – slide bearings and support thrust bearings
  • externally – gear pins, compressor crossheads, thrust blocks, pistons, etc.

Thermal spraying of ferrous/non-ferrous metal coatings onto internal and external surfaces:

  • journals of straight or cranked shafts,
  • cylinders,
  • shafts, hubs, couplings,
  • bearing bushings,
  • cast iron housings.