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| D547Mo | According with GB EDCrNi-B-15 | ||||||||||||||||||||||
| Introduction: D547Mo is a kind of CrNiSiMo valve surfacing electrode with low-hydrogen natrium type coating. DCRP (Direct Current Reversed Polarity). The surfacing metal has excellent high temperature scratch-resistance, erosion-resistance, etc., and it has higher high temperature hardness, excellent thermal stability and excellent fatigue-resistance. The surfacing metal has notable ageing strengthening effect and, as the ageing time increases, the hardness and the scratch-resistance can be improved further. | |||||||||||||||||||||||
| Uses: Used for surfacing welding on sealing faces of high pressure valves below 600℃. | |||||||||||||||||||||||
Chemical Composition of Deposited Metal (%)
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| Hardness of Surfacing Layer:HRC≥37 | |||||||||||||||||||||||
| Reference Current(DC+)
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| Instructions: 1.The electrodes must be baked under about 300℃ for an hour before welding. 2.For surfacing welding on large work pieces, valve bodies of deep-hole minor-caliber stop valves or other steel, they should be preheated under a certain temperature and cooled slowly after welding. 3.Continuous welding for three or four layers is needed in surfacing welding. There should be no intermittence. The thickness of surfacing layer should not be less than 5mm so as to guarantee the stability of hardness and chemical composition. However, the surfacing layer should not be too thick to avoid cracks. | |||||||||||||||||||||||
| D547Mo | According with GB EDCrNi-B-15 | ||||||||||||||||||||||
| Introduction: D547Mo is a kind of CrNiSiMo valve surfacing electrode with low-hydrogen natrium type coating. DCRP (Direct Current Reversed Polarity). The surfacing metal has excellent high temperature scratch-resistance, erosion-resistance, etc., and it has higher high temperature hardness, excellent thermal stability and excellent fatigue-resistance. The surfacing metal has notable ageing strengthening effect and, as the ageing time increases, the hardness and the scratch-resistance can be improved further. | |||||||||||||||||||||||
| Uses: Used for surfacing welding on sealing faces of high pressure valves below 600℃. | |||||||||||||||||||||||
Chemical Composition of Deposited Metal (%)
| |||||||||||||||||||||||
| Hardness of Surfacing Layer:HRC≥37 | |||||||||||||||||||||||
| Reference Current(DC+)
| |||||||||||||||||||||||
| Instructions: 1.The electrodes must be baked under about 300℃ for an hour before welding. 2.For surfacing welding on large work pieces, valve bodies of deep-hole minor-caliber stop valves or other steel, they should be preheated under a certain temperature and cooled slowly after welding. 3.Continuous welding for three or four layers is needed in surfacing welding. There should be no intermittence. The thickness of surfacing layer should not be less than 5mm so as to guarantee the stability of hardness and chemical composition. However, the surfacing layer should not be too thick to avoid cracks. | |||||||||||||||||||||||
