Suzhou Zhemu Industrial Equipment Co.,Ltd
Suzhou Zhemu Industrial Equipment Co.,Ltd
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Stellite6 Cobalt Base Casting Rod RCoCr-A Cobalt Alloy Surfacing High-Temperature Surfacing Welding Wire Welding Electrode
Stellite6 cobalt-based casting rod
Specifications: 2.7mm,3.2mm, 4.0mm,
Length 1000mm
Standard: AWS A5.21:2001 ERCoCr-A
Instructions:
Stellite6Continuous casting rod is one of the most widely used in cobalt-based cemented carbide, with moderate carbon and tungsten content and good toughness. In a wide temperature range below 800 ° C, it has good corrosion resistance, high temperature resistance, impact resistance and adhesion wear resistance. Can be machined.
Purpose:
For high temperature and wear and corrosion resistance under the working conditions require to maintain good performance occasions. For example, automobile, internal combustion engine valve, high temperature and high pressure valve, hot shear blade, hot forging die, etc. are subjected to impact and high temperature occasions, as well as bearing inner and outer ring surfacing.
Room temperature hardness:
HRC40-46
Chemical composition of welding wire (%)
| C | Cr | Ni | Fe | W | Co |
| 0.9-1.4 | 26-32 | max3.0 | max3.0 | 3.0-6.0 | Rem |
Mechanical properties of deposited metal (reference value)
|
strength of extension MPa |
Room temperature hardness HRc |
High temperature hardness -- example Hv | |||
| 500° C | 600° C | 700° C | 800° C | ||
| 800 | 40-45 | 365 | 340 | 274 | 250 |
Stellite 6 stands out in marine environments due to its superior wear resistance, corrosion resistance, and cavitation erosion resistance.
When compared to other alloys:
1. **aluminium bronze**: While NABs have good mechanical properties and are often used in marine structures, Stellite 6 offers better wear resistance and can be more suitable for high-wear, high-temperature, or erosive environments.
2. **Stainless Steels**: Stellite 6 generally outperforms in wear resistance but may have a lower corrosion resistance, particularly against pitting corrosion. However, high-performance stainless steels like superaustenitics can rival Stellite 6 in both wear and corrosion resistance. The choice of alloy depends on the specific application, operating conditions, and cost considerations. Stellite 6's formability and fabrication versatility, along with its cost-effectiveness over time, make it a premium choice for components that require durability and longevity in harsh marine conditions.
Note:
1. Surfacing welding can be performed by oxygen-acetylene gas welding or argon tungsten arc welding (manual or automatic).
2. When using oxygen-acetylene gas welding, the carbonization flame should be used for surfacing welding, and the length of the flame core and the internal flame should be maintained at 1:3.
3. The corner part of the welding surface must be processed into rounded corners. And remove the oxide, oil and other dirt on the surface of the base material
After the material is surfacing welding.
4. The appropriate preheating temperature should be selected according to the type of base metal and the size of the workpiece.
5. When surfacing welding, the base material only needs to be heated to present a "sweating" (wetting) state, and the welding wire melt drops can be added
The base material should not be melted. Each layer of surfacing can be remelted by carbonization flame on the surface of the welding layer, to check whether there are pores, depressions or insufficient surfacing defects, and to weld once found.
6. The workpiece after surfacing welding must be immediately put into a dry and preheated sand tank or grass ash to cool it slowly and avoid cracks.
7. The surfacing layer must be roughed first. If defects are found, the workpiece should be reheated and welded according to the above steps.