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WC-20Cr3C2-7Ni Thermal Spray Powder

  • Agglomerated and sintered gray-black spherical or near-spherical particles with good flowability.
  • The maximum service temperature is up to 750℃. It can be used in humid environments.
  • The dense coating has excellent resistance to oxidation, corrosion, and abrasion.
  • Anti-oxidation and corrosion resistance are better than WC-Co – based coatings.
  • Mainly used in the steel & iron industry, paper making, pump valves, etc.

Grade & Chemical Composition

Grade

Chemical Composition (Wt, %)

W

T. C 

Ni

Cr

Fe

O

ZTC48D*

Balance

5.8 – 6.4

6 – 8

20 – 23

≤ 0.5

≤ 0.5

*: D stands for spherical or nearly spherical thermal spray powder.

Size & Physical Properties

Grade

Type

Size Fraction (μm)

Apparent Density ( g/cm³)

Flow Rate

(s/50g)

Application

ZTC4851D

WC – Cr3C2 – Ni

73/20/7 Agglomerated

& Sintered

– 53 + 20

≥ 4

≤ 18
  • HVOF

(JP5000 & JP8000, DJ2600 & DJ2700, JetKote,

Woka Jet, K2)

  • HVAF
  • APS

ZTC4853D

– 45 + 20

≥ 4

≤ 18

ZTC4852D

– 45 + 15

≥ 4

≤ 18

ZTC4881D

– 45 + 11

≥ 4

≤ 18

ZTC4854D

– 38 + 10

≥ 4

≤ 18

ZTC4882D

– 30 + 10

≥ 4

≤ 30
We can tailor-make different particle size distributions and apparent densities for various applications.
Recommended Spray Parameters (HVOF)

Coating Properties
Material

WC -20Cr3C2 – 7Ni

Hardness (HV0.3)

950 – 1200
Manufacturing

Agglomerated & Sintered

Bonding Strength (MPa)

> 70MPa
Size Fraction (µm)

– 45 + 15

Deposited efficiency (%)

35 – 45%
Spray Torch

JP5000

Porosity (%)

< 1%
Nozzle (inch)

6

Kerosene (L/h)

23

Oxygen (L/min)

900

Carrier gas (Ar) (L/min)

8.0

Powder feed rate (g/min)

70 – 80

Spraying distance (mm)

340 – 360