Description:
Cobalt-based surfacing wire welding is Co-Cr-W surfacing alloy in the C and W content of the lowest,the best toughness of a. Can withstand the impact of hot and cold conditions, resulting in a small tendency to crack, with good corrosion resistance, heat resistance and wear resistance.
Use:
Mainly used to require high temperature work to maintain good wear resistance and corrosion resistance,
such as high temperature, high pressure valves, hot shear blade, hot forging die.Surfacing layer hardness HRC: 40-45
Note:
1. Protection of gas: the use of pure Ar; flow: current in the 100 ~ 200A 9 ~ 14L / min, the current in the 200 ~ 300A 14 ~ 18L /min.
2. Tungsten pole extension length: 3 ~ 5mm; arc length: 1 ~ 3mm.
3. Wind speed limit of ≤ 1.0m / s; Proposed in the welding area on the back of the argon protection.
4. In the welding, the welding line energy directly affects the size of the weld metal mechanical properties and crack resistance,etc.,should be more attention.
5. The welding parts of the rust layer, moisture, oil, dust, etc. in addition to the net.
The above recommendations are for reference only, in the specific operation of the prevailing situation prevail. If necessary,first process evaluation and then determine the welding program.