D822 cobalt-based alloy electrodes standards in line with GB EDCoCr-C-03 rather AWS ECoCr-C D822 cobalt-based alloy electrode Description: high carbon cobalt-chromium tungsten alloy core of cobalt-based welding electrodes, DC reverse, slag coverage is good, forming beautiful, with excellent wear resistance, heat resistance, corrosion resistance, high temperature at 650 ℃ can maintain these characteristics. D822 cobalt-based alloy electrode Use: welding cone bit bearing, rotating impeller boilers, mill edge, screw feeder and other wear parts. D822 cobalt-based alloy electrode deposited metal chemical composition /% C 1.75-3 Si≤2 Mn≤2 Cr 25-33 Fe≤5 W 11-19 other ≤4 the balance of Co D822 cobalt-based alloy electrode surfacing hardness HRC: ≥53 above chemical composition and hardness at room temperature refers to three or more surfacing welding metal. D822 cobalt-based alloy electrode reference current: AC or DC D822 cobalt-based alloy electrode wire diameter (mm) 3.2 4.0 5.0 D822 cobalt-based alloy electrode welding current (A) 90 ~ 130 140 ~ 170 170 ~ 200 D822 cobalt-based alloy electrode Caution : 1. 150 ℃ before welding electrodes shall be baked for one hour. 2. In order to avoid cracks, according to the workpiece size and the type of the base material shall be preheated 200 ~ 400 ℃ of. And should be low current short-arc welding. After welding the workpiece should be immediately placed in the drying and preheating of sand or kelp in the slow cooling cylinder. 3. Since arc welding temperatures relatively high, so the dilution rate is relatively large welding, it is generally difficult if only in order to improve the welding or arc welding efficiency considerations were.