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WC-12Co 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.
  • High fracture toughness.
  • Mainly used in mechanical parts, oil and gas equipment, metallurgical roller and pump seal, etc.

Grade & Chemical Composition

Grade

Chemical Composition (Wt, %)

W

T. C 

Co

Fe

O

ZTC42

Balance

5.2 – 6.0

11.5 – 12.5

≤ 1.0

≤ 0.5

ZTC42D*

Balance

5.2 – 6.0

11.5 – 12.5

≤ 0.15

≤ 0.5

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

Size & Physical Properties

Grade

Type

Size Fraction (μm)

Apparent Density ( g/cm³)

Flow Rate

(s/50g)

Application

ZTC4251

WC – Co  88/12               Sintered & Crushed

– 53 + 20

≥ 4

≤ 25
  • HVOF

(JP5000 & JP8000, DJ2600 & DJ2700, JetKote,

Woka Jet, K2)

  • HVAF
  • APS

ZTC4253

– 45 + 20

≥ 4

≤ 25

ZTC4252

– 45 + 15

≥ 4

≤ 25

ZTC4251D

WC – Co 88/12

Agglomerated

& Sintered

– 53 + 20

≥ 4

≤ 18

ZTC4253D

– 45 + 20

≥ 4

≤ 18

ZTC4252D

– 45 + 15

≥ 4

≤ 18

ZTC4281D

– 45 + 11

≥ 4

≤ 18

ZTC4254D

– 38 + 10

≥ 4

≤ 18

ZTC4282D

– 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 – 12Co

Hardness (HV0.3)

1100 – 1300
Manufacturing

Agglomerated & Sintered

Bonding Strength (MPa)

> 70MPa
Size Fraction (µm)

– 45 + 15

Deposited efficiency (%)

40 – 50%
Spray Torch

JP5000

Porosity (%)

< 1%
Nozzle (inch)

6

Kerosene (L/h)

22.7

Oxygen (L/min)

944

Carrier gas (Ar) (L/min)

7.5

Powder feed rate (g/min)

70 – 100

Spraying distance (mm)

350 – 380