What are the copper welding materials
1. Welding argon purity ≥99.99%, dew point ≤ -50 ℃, and should meet the GB / T4842 or GB10624 requirements. When the bottled argon pressure ≤ 0.5Mpa should not be used. 70% Ar + 30% N2 mixed gas can be used when the preheating is inconvenient or if the depth of penetration is large. Nitrogen and helium for the protection of gas argon when the penetration depth of 2 to 3 times, but the nitrogen is also easy to increase the tendency of stomata.
2. Manual tungsten electrode welding electrode using cerium tungsten electrode. The diameter of the electrode should be chosen according to the size of the welding current (generally larger than the required specification for welding current).
3. The main role of flux is to remove the oxide film and some other impurities, to prevent molten metal bath and other gases into the molten pool, and improve the liquid metal mobility. The use of anhydrous alcohol can be adjusted into a paste or solder powder directly on the groove and on both sides or welding with wire welding flux. Gas protection welding can also use flux to enhance the protection of the bath.
4. To the more important structure, in order to eliminate the adverse effects of oxygen, must be used with aluminum, titanium and other strong deoxidizer wire; in order to prevent the alloying element welding process oxidation and evaporation: welding brass (to prevent zinc oxidation and evaporation) Silicon wire and quick welding to reduce the high temperature residence time, solder bronze (to prevent tin oxidation and evaporation) can be used with silicon, phosphorus and other deoxidizing agent wire and borax and boric acid as flux, welding aluminum bronze (to prevent aluminum oxidation and evaporation) can be used Chlorinated salts and fluorinated salts.
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