Laser Cladding of carbide materials enables extra wear resistance due to the metallurgical bond and optimal carbide integration. As such laser cladding is a valid alternative in terms of cost and quality for conventional techniques suct as PTA, HVOF, PLASMA JET and others. More info on www.lcv.be

1. Laser Cladding of Metal Matrix
Composites
LCV NV
Characteristics of laser cladded carbide hard facing

2. 2
Metallurgical bond between clad and substrate  extra wear resistance
Fine microstructure formed by rapid solidification  extra hardness
Minimal carbide dilution & high filler ratio  extra wear resistance
Minimal heat input  limited deformation
Laser Cladding of Carbide
Materials

3. 3
LCV-Carbide Materials
Coating Type Coating Name Hardness Wear Impact Ductility Corrosion Sulfur Salt Fog
Operating
Temp C
Stainless Steel 316L +
Tungsten Carbide
LCV-CorroSlide
52-60 HRc      530 °C
NiChrBSi + Tungsten
Carbide
LCV-CorroSlide
Optima 60-68 HRc      800°C
Co + Tungsten Carbide
LCV-Corroslide
Sulfur 60-68 HRc      800°C
Inconel 625 + Tungsten
Carbide
LCV-Corroslide
Thermo 52-62 HRc       900 °C
Hastelloy+ Tungsten
Carbide
LCV-Corroslide
Ultima 35-40 HRc *       550 °C
Metal
Powder
Ceramic
Powder
Powder and transport gas
Laser
Melt pool
Shield gas

4. 4
CONVENTIONAL COATINGSLASER CLADDING
Minimal dilution
Combination of properties
LCV-Carbide Material Structure
(Comparison with conventional coatings)
Galvanic (ex. Chrome)
• Chemical bond
• Microstructure cracks
Thermo Spray (ex. HVOF)
• Mechanical bond
• Porosity and micro structure
defects
Hard Facing (ex. PTA)
• Metallurgical bond
• Dissolved carbide structure,
high-themp gradient
New (mixed) carbide phase in matrix and at
carbide-matrix interface is originated
• Fully dense, metalurgic bond
• Ductile Matrix
• Hard Particles
• Corrosion resistance of matrix

5. TRIBOLOGICAL CHARACTERISATION: BALL ON DISC
0
5
10
15
20
25
30
35
40
0 0 15 15 30 30 30 30 40 40 40 40
Wearcoating(mm³/Nm)*10-6
WC/W2C content (volume %)
Wear Inconel 625 coating vs WC content
» Logarithmic decrease in wear with % carbides
» Addition of 40 vol% tungsten carbide results in a
decrease in wear by factor 15

6. TRIBOLOGIC COMPARISON OF LASER CLADDING AND HVOF ON NICKEL BASED CARBIDES
CONCLUSION
LASER CLADDING HAS ON AVERAGE 4 TIMES BETTER WEAR RESITANCE COMPARED TO
SPRAYED AND FUSED HVOF DUE TO THE FULL METALURGICAL BOND
60-65 HRC

7. TRIBOLOGIC COMPARISON OF LASER CLADDING AND PTA ON NICKEL BASED CARBIDES
CONCLUSION
LASER CLADDING HAS ON AVERAGE 2 to 3 TIMES BETTER WEAR RESITANCE COMPARED
TO SPRAYED AND FUSED HVOF DUE TO MINIMAL DILUTION AND HIGH GRIT RATIO
Laser claddedPTA
Powder 1 Powder 2 Powder 3

8. Increase in lifetime: factor 6
compared with new screw!
Transportation screw for animal food
processing: cladding with Ni + WC
APPLICATION EXAMPLE CORROSLIDE OPTIMA : EXTRUDER SCREW

9. Thank You
Address
Laser Cladding Venture nv
Nijverheidslaan 1500
3660 Opglabbeek
Belgium
Phone & E-mail
Tel.: 32 89 65 10 22
E-mail: info@lcv.be
Website: http://www.lcv.be/