Copper oxy-acetylene welding can use wire 201 (or wire 202) welding wire and flux 301. It is preheated by 400~700 before welding, and the welding flame adopts neutral flame and large flame power. Using less welding layers, hammer weld after welding to reduce welding stress. 2, electrode arc welding copper electrode arc welding can choose copper 107 or copper 227 electrode. The power supply uses DC reverse connection. The preheating temperature before welding is 300~500, short arc and straight line shuttles are used during welding, and the welding seam is hammered after welding to reduce welding stress. 3, the welding wire and flux used in tungsten-argon arc welding of copper are the same as those used in oxyacetylene welding, and the power supply is directly connected with DC. Preheat before welding, but the temperature should not be too high.
The structure of copper - based corrosion resistant alloys should be single phase to avoid the electrochemical corrosion caused by the second phase in the alloy. Therefore, the alloy elements added should have great solid solubility in the copper rod, and even infinite mutual solubilization elements. The single-phase brass rod, bronze rod and white copper rod used in the project have excellent corrosion resistance function, which is an important heat exchange information.