Cobalt based powder for Thermal Spray coating
Thermal spray cobalt based alloy mainly including CoMoCrSi(Tribaloy) series alloy and CoCrNiWC(stellite) series alloy. Their common characteristic is anti-wear in high temperature, anti-thermal corrosion, anti-oxidant. The feature of CoMoCrSi alloy texture is disperse abundant Mo phase(including Mo silicide) onto soft cobalt based structure, the spray coating has good properties of anti-high temperature slide wear, anti-corrosion and anti-oxidant.
|
NO |
Material |
Chemical composition(%) |
|||||||||
|
Co |
Cr |
W |
Mo |
Ni |
Fe |
Si |
Mn |
C |
Others |
||
|
1 |
CoCrW 50 30 12 |
Bal |
29-30 |
11.5-13.5 |
|
≤3 |
3 |
0.8- 1.1 |
|
2.3- 2.5 |
|
|
2 |
CoCrW 60 28 4 |
Bal |
27-30 |
3.5-5 |
|
≤3 |
3 |
0.8- 1.1 |
|
0.9- 1.2 |
|
|
3 |
CoCrW 53 30 8 |
Bal |
29-31 |
7.5-9 |
|
≤3 |
3 |
1.0- 1.6 |
|
1.3- 1.6 |
|
|
4 |
CoCrNiW 50 26 107 |
Bal |
24-27 |
6.5- 8.5 |
|
8.5- 11.5 |
2 |
≤0.6 |
≤0.6 |
≤0.5 |
|
|
5 |
CoCrNiW 40252210 |
Bal |
23-27 |
10- 14 |
|
20-24 |
|
|
≤1 |
1.5- 2.0 |
|
|
6 |
CoCrMo 60 27 5 |
Bal |
25-29 |
|
4.5-6.5 |
≤3 |
3 |
≤2.5 |
≤1 |
≤0.3 |
|
|
7 |
CoMoCrSi 51 2817 3 |
Bal |
16-19 |
|
27- 30 |
≤1.5 |
1.5 |
3-4 |
|
|
|
|
8 |
CoCrNiNb 50 28 7 6 |
Bal |
26-30 |
|
2.5-4.5 |
5.5- 7.5 |
2 |
≤0.6 |
≤0.6 |
1.6- 2.2 |
Cu:1.4-1.8 Nb4.5-6.5 |
For the 7 column, Co-Mo 28% Cr 17% Si 3% and Co-Mo 28% Cr 8% Si 2% cobalt alloy, they are similar as our WD-Co400 and WD-Co800 alloy powder. Production process is water fog. HVOF thermal spray coating has good anti-corrosion property in reducibility atmosphere, oxidability atmosphere, inoxidizability atmosphere and seawater. The anti-thermal corrosion and antioxidant property is good at working temperature below 800℃. Co-Mo 28% Cr 17% Si 3% Si has high content of Cr element, it has better anti-corrosion and anti-wear properties. Also it can add Ta element, Co-Cr24% Ni-10% W-7% Ta 3.5% C 0.6%, the adding of Ta can increase anti-high temperature property. Gas atomization powder, Plasma thermal spray can be used for steam turbine combustor, blade wear repair.
Besides, for Co-Cr28% W 4% Ni 3% Fe 3% Si 1.5% C 1% Mo 1%, it is similar as our cobalt 6 alloy, it is Gas atomization powder. Coating compact, anti-high temperature and anti-wear. It is used in heating parts of turbine motor, etc. International brand is stellite 6.
Co-Cr 28% W 4% Ni 3% Fe 3% N 0.6% alloy, it is a heat-resisting alloy, too. It’s working temperature can reach 815℃(1500°F). HVOF thermal spray coating hardness is 48-50HRC, micro hardness is 775HV, porosity rate less than 2%, it can used for protection coating for hardfacing touch wear, axis, bearing, blade, etc.
