G217
Description:
G217 is alkaline Cr13 stainless steel electrode coating, the use of DC reverse, all-position welding.
use:
For welding 06Cr13 and 12Cr13, 20Cr13 stainless steel structure, such as turbine blades repair welding and butt, can also be used for corrosion-resistant, wear-resistant surface surfacing.
Deposited metal chemical composition (%)
| C | Mn | Si | S | P | Cr | Ni | Mo | Cu |
guarantee value | ≤0.12 | ≤1.0 | ≤0.90 | ≤0.030 | ≤0.040 | 11.0 ~ 14.0 | ≤0.70 | ≤0.75 | ≤0.75 |
Mechanical properties of deposited metal (specimen at 730 ~ 760 ℃ insulation 1h, with no more than 60 ℃ / h speed furnace cooling to 315 ℃, and then air-cooled)
Pilot projects | Rm (N / mm 2 ) | A (%) |
guarantee value | ≥450 | ≥15 |
Reference current (DC + )
Electrode diameter (mm) | φ2.0 | φ2.5 | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 40 ~ 80 | 50 ~ 100 | 70 ~ 120 | 90 ~ 160 | 160 ~ 200 |
Precautions:
1. Before welding electrodes to be about 250 ℃ baking 1h.
2. Welder must be welded before the removal of rust, oil, water and other impurities.
3. Weld before welding preheated to 300 ~ 350 ℃, after welding by 730 ~ 760 ℃ tempering.
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