D512
Description:
D512 titanium calcium type 2Cr13 valve welding electrodes, AC and DC, welding process is good. Surfacing metal 2Cr13 martensitic high-chromium steel. Surfacing layer with air quenching characteristics, generally do not need heat treatment, hardness uniformity, annealing at 750 ~ 800 ℃ softening, when heated to 950 ~ 1000 ℃ air cooling or oil quenching can be re-hardened.
use:
D512 is a versatile electrode for surfacing, which is harder and more wear-resistant than D502 for hard surfacing carbon steel or low alloy steel shafts, overheated steam valves, mixer paddles, Spiral conveyor blades and so on.
Deposited metal chemical composition (%)
| C | Cr | Other elements of the total |
guarantee value | ≤0.25 | 10.00 ~ 16.00 | ≤5.00 |
Surfacing layer hardness:
(Air-cooled after welding) HRC ≥ 45 (softening to 500 ℃)
Reference current (AC, DC)
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 80 ~ 120 | 120 ~ 160 | 170 ~ 210 |
Precautions:
1. The electrode before welding shall be baked at 150 ℃ for 1h
2. The workpiece should be preheated to over 300 ℃ before welding, and the corresponding hardness can be obtained if different heat treatment after welding.
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