Thermal Spray Coatings

TUNGSTEN CARBIDE COATINGS

 

CFS 100 is an excellent solution for high wear applications requiring a coating thickness NO greater than 0.012”. CFS 100 is the result of  thermal spray technology which produce coatings with a high concentrations of carbide particles and high bond strengths. Carbide coatings are very useful for a host of applications which include mixing bowls, the repair of drilling tools, compressor rods and pump components.

 

PHYSICAL PROPERTIES

 

PRINCIPLE CONSTITUENT

Tungsten Carbide

PROCESS

HVOF: Jet Kote II

WEAR RESISTANCE

Excellent

HARDNESS, Rc

70

CHEMICAL COMPOSITION

88 % Tungsten Carbide

12 % Cobalt

THICKNESS LIMITATIONS

0.012” plus

APPLICATION RATE, lbs/hr

8

TENSILE STRENGTH

10,000 psi min.

COEFFICIENT OF THERMAL EXPANSION, 10-6 in/in/°F

4.2

Metallographic POROSITY, Vol. %

<0.5

TOUGHNESS

Excellent

CORROSION RESISTANCE

Excellent in Chlorine Service.

MAX. OPERATING TEMPERATURE

1,000 °F (540 °C)

COMPARABLE SPECIFICATIONS

LW-IIB/1NB/1N30, RAM #1, JK-112/114, WC-525, FWG 801, CFS 100

MAIN FEATURES

Excellent sliding wear and erosion resistance

 

TYPICAL APPLICATIONS

 

DRILLING TOOLS

VESSELS

VALVE SEALING SURFACES

THERMOWELLS

PUMP SHAFTS, SLEEVES IMPELLERS, PLUNGERS

COMPRESSOR RODS

CYLINDER LINERS

BALL AND PLUG VALVES

 

CORROSION RESISTANCE

 

Aluminum Sulfate

Halides

Hydrochloric Acid

Sulfuric Acid

CFS 100 is chosen primarily for its resistance to wear or the combined effects of wear and corrosion and not for corrosion alone. It is advisable to choose a substrate that is also corrosion resistant to the specific service conditions.


MAXIMUM RESISTANCE TO HIGH TEMPERATURE RESISTANCE

TO WEAR AND EROSION

Popular chrome carbide coatings can now be applied to thicknesses in excess of 0.125”. CFS 131 is composed of chrome carbide in a nickel-chrome binder. The chrome carbide particles retain their shape after being sprayed instead of going into solution. The resultant coating is hard, ductile and resistant to abrasive and sliding wear. CFS 131T may be used as a wear-resistant coating for slide valve stems, thermowells and pump components in refineries exposed to 1350°F temperatures and for severe service ball valves exposed to steam, coal liquifaction, coke, catalyst fines and a wide variety of abrasive slurries.

 

PHYSICAL PROPERTIES

PRINCIPLE CONSTITUENT

Chrome Carbide

PROCESS

HVOF

WEAR RESISTANCE

Good to Excellent

HARDNESS: Superficial

Hardness: Micro

87-89 R15n(53-57 Rc converted)

1000 - 1100 DPH300

CHEMICAL COMPOSITION

75 % Chrome Carbide

25 % Ni-Cr

SURFACE TEXTURE

As Sprayed: 150-250 rms

As Ground:   8-12 rms

As Lapped:   <1 rms

THICKNESS LIMITATIONS

0.125”

TENSILE STRENGTH

10,000 psi min.

COEFFICIENT OF THERMAL EXPANSION, 10-6 in/in/°F

5.6

APPLICATION TEMPERATURE

<250 °F (120 °C)

POROSITY

<1/2 %

TOUGHNESS

Excellent

CORROSION RESISTANCE

Excellent

MAX. OPERATING TEMPERATURE

1,500 °F (760 °C)

MAIN FEATURES

Excellent erosion, impact and thermal shock resistance at both low and high temperatures.

 

TYPICAL APPLICATIONS

VALVE STEMS

PLUG VALVE PLUGS

 

PUMP IMPELLERS AND CASING

COOLING RINGS

COAL SHOOTS

METERING VALVES

BALL VALVES:  BALL AND SEATS

THERMOWELLS

FCCU: SLIDE VALVE STEMS, STEM TUBES

 

The coating data provided herein was generated by skilled operators using equipment in good working condition. The information is believed to be accurate and reliable; however, thermal spray results may vary. Gulf Oro Industries is committed to a continuing program of product improvement. Product specifications are subject to change without notice. Gulf Oro Industries warrants that the coatings it generates are furnished free of defects in material and workmanship. No other warranty is expressed or implied.

 

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