Self-fluxing powders.

Self-fluid alloys are universal and widespread materials in the technique of creating wear-resistant and resistant to chemical corrosion and oxidation coatings. Alloys are alloyed with boron and silicon, forming light-melting fluxes when the coating material interacts with the surface of the sprayed part. Boron and silicon reduce the melting temperature of the coating and increase the fluidity of the melt, and the presence of solid chromium boride and complex carboborides in the alloys ensure the hardness and wear resistance of the coating. These positive properties of alloys allow you to create on the surface of steel and cast iron products dense, with high adhesion strength coating, and the ability to regulate a wide range of hardness of alloys with a different ratio of components, give this class of materials for coating the character of universality.
Powder particle sizes, μm
- for spraying with melting 15-45, 20-63, 40-100, 45-106, 45-125;
- for plasma surfacing 80-160, 63-200, 100-280, 160-280, 280-400.

Application
Alloys based on Ni (B01, 02, 03, 04, 05, 06, 07, 20, 22, 24, 28, 29, 30) are used to create on the surface of steel products resistant to mechanical friction coatings. The coatings are also resistant to oxidation up to temperatures of 850 degrees Celsius, corrosion in fresh and sea water, salt and alkaline solutions, oil-containing media, ammonia, and other aggressive media. Coatings with high hardness (B03, 04, 05, 29, 30) are resistant to abrasive wear.
Ni-based alloy with copper (B12) is sprayed mainly on cast iron products.
Copper-based alloy - self-flushing bronze (B13) is used for coating copper alloys and welding copper with steel.
Alloy based on Fe (B26) is resistant to wear in water abrasive media.
Cobalt alloys (B31, 32, 33, 34) are used to create coatings that work at elevated loads and temperatures. Coatings of the rack to abrasive wear at temperatures of 540-840 degrees Celsius and corrosion fretting.

Metal powders for restoration of glass-forming machines and cast-iron presses by spraying coatings

Materials and technology of gasothermal coatings allow:
- to correct defects in mold casting
- to restore the dimensions and geometry of worn molds, to restore and increase the operational resistance of parts of the components of the glass-forming machine experiencing mechanical wear, temperature and impact loads.

For restoration of molds and parts of glass-forming machines
OJSC Polema offers self-fluid powder alloys of Ni-Cr-B-Si, Ni-B-Si, Ni-Cu-B-Si system.

Powder PR-NS2P (analogue PG-10N-04) for the restoration of molds.
Composition: Ni Si 2.5 B1.4. Hardness of the coating 90-100 HRB, , good wetability of cast iron, heat resistance, resistance to melt glass, good coating machinability.

Powder PR-HD42CP to restore molds.
Composition: Ni Cu 42.5 Si 0.9 B1. The hardness of the coating 200-215 HB, good wettability of cast iron, heat resistance, melt resistance of glass, impact resistance, good coating machinability.

Powder PR-NX13CP for the restoration of molds and parts of the glass-forming machine. Composition: Ni Cr13 Si2.4 B1.5. The hardness of the coating 29-34 HRC, good wettability of cast iron, heat resistance, melt resistance of glass, air corrosion resistance up to 800 ° C, impact resistance, good coating machinability. 

Recommended powder fractions: 20-63, 40-100 (45-106) μm.

Recommended technology: gas powder coating with the use of acetylene-oxygen, MAF-oxygen or propane-oxygen flame and gas burners of the type GN (VNIIAAutogenmash), or similar equipment of other manufacturers.