D307 is a CrWV-type surfacing welding electrode with low-hydrogen sodium coating, which adopts DCEP connection method.
The product is applicable for surfacing or repairing medium carbon steel tool edges, worn tools and other tools.
Precautions:
Before welding, the welding electrode should be baked at 300-350℃ for 1h.
Before surfacing, the small work piece should be preheated to 300℃ and the large work piece should be preheated to 600℃.
The heat treatment conditions of surfacing tool are the same as those of W18Cr4V high speed steel.
| Chemical components of deposited metal (%) | ||||||
| Test item | C | Cr | W | V | P | S |
| Example value | 0.85 | 4 | 19 | 1.35 | 0.02 | 0.009 |
| Reference current (DC+) | |||
| Welding electrode diameter (mm) | Φ3.2 | Φ4.0 | Φ5.0 |
| Welding current (A) | 100-130 | 130-160 | 170-220 |
