Cobalt alloy 6 Strips For Steam Turbine Blades
The last stage blades of the steam turbine are prone to water corrosion, and the failure of the blades leads to the unsafe operation of the steam turbine. The cobalt alloy blade anti-corrosion sheet properly solves the problem, and the cobalt alloy anti-corrosion sheet is welded to the blades by brazing. , effectively prevent the water corrosion of the steam turbine blades, and improve the safety and economy of the normal operation of the steam turbine.
- SYTOP
- China
- 20-35days
- 3000pcs/ month
- Information
Cobalt Alloy 6 Strips For Steam Turbine Blades
Cobalt alloy strips are welded to steam turbine blades. Cobalt alloys have high hardness and good toughness, small variation when water droplets hit, good resistance to water corrosion and erosion, and high microstructure stability, although beyond a certain range Water corrosion will also occur, but the ability to resist fracture is good, and even if serious water corrosion occurs, it is not easy to produce cracks. At the same time, different shapes of alloys can be selected according to the operating conditions. When the water corrosion is serious, a new cobalt alloy sheet can be replaced, which is very suitable for the working conditions of the blade. Therefore, when welding cobalt alloy, the most commonly used method to prevent water corrosion of steam turbine blades method.
1. cobalt alloys have higher melting points than nickel (or iron) alloys ,This gives them the ability to absorb stress to a higher absolute temperature .
2. cobalt alloys give superior hot corrosion resistance to gas turbine atmospheres , this is due to their high chromium content.
3. cobalt alloys show superior thermal fatigue resistance and weldability over nickel alloys .
---Excellent wear and corrosion resistance even at high temperature up to 800℃
Chemical compositions and properties (%)
Brand | C | Mn | Si | Cr | Ni | Mo | W | Co | Fe | P | S | Density (g/cm3) | Hardness (HRC) |
Co 3 | 2.0-2.7 | 1.0 | 1.0 | 29-33 | 3.0 | 11-14 | Bal. | 3.0 | ≤0.03 | ≤0.03 | 8.55 | 51-55 | |
Co 6 | 0.9-1.4 | 1.0 | 1.5 | 27-31 | 3.0 | 1.5 | 3.5-5.5 | Bal. | 3.0 | ≤0.03 | ≤0.03 | 8.35 | 38-44 |
Co 12 | 1.1-1.7 | 1.0 | 1.0 | 28-32 | 3.0 | 7.0-9.5 | Bal. | 3.0 | ≤0.03 | ≤0.03 | 8.40 | 44-49 | |
Co 20 | 2.2-3.0 | 2.0 | 30-34 | 3.0 | 1.0 | 14-18 | Bal. | 3.0 | ≤0.05 | ≤0.05 | 8.65 | 53-59 | |
Tantung-G 25 | 2.2-2.8 | 1-3 | 27-32 | 7 | Ta/Nb | 14-19 | Bal. | 2-5 | 8.84 | 57-60 | |||
Tantung-G35 | 3.3-3.8 | 1-3 | 27-32 | 7 | Ta/Nb | 14-19 | Bal. | 2-5 | 8.80 | 60-63 | |||
Co 400 | 0.04 | 2.5-2.7 | 8-10 | 27-29 | Bal. | 55 | |||||||
Co 800 | 0.04 | 3.2-3.6 | 16-18 | 27-29 | Bal. | 58 |
SYTOP cobalt base alloys is a range of cobalt-chromium-tungsten alloys with wear resistance, corrosion and high thermal resistance. It is widely used in oil & gas, machinery, wood cutting, automotive, paper and food processing industry etc.
Specifications that we can made :
Different size bars , rods , ingots , plate
Drawing made seal , valve seat and ball , bush and sleeve etc.
Some size tube
Most of our products are made upon request so contact us right now for personal and professoinal service.
More details about cobalt chrome round bar please do not hesitate to contact me .
