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WC-10Co4Cr Thermal Spray Powder

  • Both Agglomerated & Sintered and Sintered and Crushed powder are available. Agglomerated and sintered powders are spherical or near-spherical with good flowability. Sintered and crushed powders are irregular.
  • The maximum service temperature is up to 500℃.
  • The dense coating has high hardness with excellent resistance to abrasive wear, fretting wear, adhesive wear, and erosion wear.
  • Replacing hard chrome plating.
  • Cobalt &Chrome has better corrosion resistance and wear properties than Cobalt, especially in wetting and corrosion environments.
  • Mainly used in aircraft landing gear, gate valves, ball valves, paper rollers, hydraulic cylinders, compressor rods, metallurgical rollers, mechanical parts, etc.

Grade & Chemical Composition

Grade

Chemical Composition (Wt, %)

W

T. C 

Co

Cr

Fe

O

ZTC45

Balance

5.2 – 6.0

9.1 – 10.1

3.0 – 4.5

≤ 1.0

≤ 0.5

ZTC45D*

Balance

5.2 – 6.0

9.1 – 10.1

3.0 – 4.5

≤ 0.15

≤ 0.5

*: D stands for spherical or near-spherical thermal spray powder.

Specification & Physical Properties

Grade

Type

Size Fraction (μm)

Apparent Density ( g/cm³)

Flow Rate

(s/50g)

Application

ZTC4551

WC – Co – Cr 

86/10/4               Sintered & Crushed

– 53 + 20

≥ 4

≤ 25
  • HVOF

(JP5000 & JP8000, DJ2600 & DJ2700, JetKote,

Woka Jet, K2)

  • HVAF
  • APS

ZTC4553

– 45 + 20

≥ 4

≤ 25

ZTC4552

– 45 + 15

≥4

≤ 25

ZTC4551D

WC – Co – Cr

86/10/4

Agglomerated

& Sintered

– 53 + 20

≥ 4

≤ 18

ZTC4553D

– 45 + 20

≥ 4

≤18

ZTC4552D

– 45 + 15

≥ 4

≤18

ZTC4581D

– 45 + 11

≥ 4

≤18

ZTC4554D

– 38 + 10

≥ 4

≤18

ZTC4582D

– 30 + 10

≥ 4

≤ 18
We can tailor-make different particle size distributions and apparent densities for various applications.
Recommended Spray Parameters (HVOF)

Coating Properties
Material

WC – 10Co – 4Cr

Hardness (HV0.3)

1150 – 1400
Manufacturing

Agglomerated & Sintered

Bonding Strength (MPa)

> 70MPa
Size Fraction (µm)

– 45 + 15

Deposited efficiency (%)

40 – 55%
Spray Torch

JP5000

Porosity (%)

< 1%
Nozzle (inch)

6

Kerosene (L/h)

24

Oxygen (L/min)

944

Carrier gas (Ar) (L/min)

7.5

Powder feed rate (g/min)

70 – 80

Spraying distance (mm)

340 – 380