DIFFERENCE BETWEEN CURRENT AND BRAZED HARDFACING

• Inhomogeneous microstructure – very hard particles embedded in a soft matrix• Soft matrix wears o� – dislodging hard particles

WALL COLMONOY Alloy 88 (Current Hardfacing)

• Brazed hardfaced coating has a more uniform microstructure• Expected to have superior wear resistance

Brazed WC Hardfacing

1328 HVN988 HVN

1018 HVN

964 HVN

0.002”

907 HVN

374 HVN

Novel Brazed Hardfacing

◆ Fine powders of WC or Tribaloy T-800 and braze alloy are mixed together with a binder to form a slurry

◆ Parts are either sprayed with or dipped in the slurry (for complex shapes or ID bores) at room temperature

◆ Coated parts are exposed to brazing temperature in vacuum to fuse the braze alloy and produce a metallurgically bonded coating

◆ By selecting the braze alloy, hardfacing and heat treating can be accomplished in the same operation

www.brucediamond.com

Advantages of Brazed Hardfaced WCCompared to Thermal Sprayed WC

◆ Fully dense; no porosity – will not require sealing of surface pores as needed for thermal sprayed WC to improve corrosion resistance

◆ WC particles are embedded in a corrosion and wear-resistant Ni-Cr matrix

◆ Higher ductility and toughness compared to thermal sprayed WC; can be used for flexible substrates

◆ Expected to be more cost-e�ective than thermal spray (less over-spray and less capital intensive)

Brazed WC allows for hardfacing of inner diameters and complex shapes.The slurry can be applied by either dipping or spraying. The resulting surface is very smooth and close to the base substrate.

0

10

20

30

40

50

60

Wea

r vol

ume,

mm

3

ASTM G-65 Abrasion Resistance Test Wear Volume6000 revolutions, 9” diameter wheel and 30 lb. load

WeldoverlayWC

16.5

Stellite-6

55.0

LasercladColmonoy 88

21.2

Brazed WC

13.6

SUPERIOR WEAR RESISTANCE

Novel Brazed Hardfacing

1231 County St.Attleboro, MA 02730

TEL (800) 346-8802FAX (800) 552-7823

www.brucediamond.com