Welding materials:
The purity of CO2 gas should be 99.5%; The water content shall not exceed 0.65438 0%; The carbon content shall not exceed 0. 1%.
There is no rust on the surface of copper-plated welding wire.
Extended data:
Welding preparation
1. Cleaning the weld before welding requires that burrs, oil stains and rust scales that affect the weld quality within 30mm on both sides of the groove must be cleaned up.
2. When the construction environment temperature is below zero or the carbon equivalent of steel is more than 0.4 1%, and the structural stiffness is too large and the object is thick, preheating measures should be taken before welding. The preheating temperature is 80℃~ 100℃, and the preheating range is 5 times of the plate thickness, but not less than100 mm.
3. When the thickness of the workpiece is greater than 6mm, in order to ensure the penetration strength, a V-shaped or X-shaped groove should be cut at the butting edge of the plate, the groove angle is 60, the blunt edge P is 0~ 1mm, and the assembly clearance B is 0 ~1mm; When the thickness difference is greater than or equal to 4 mm, the butt edges of thicker plates shall be chamfered, as shown in the figure:
4. Before welding, carefully check the smooth wire feeding and gas flow of CO2 welder.
5. If bottled gas is used, it should be discharged and purified, and the gas pressure should be checked. If it is lower than 9.8×10.5pq (10kgf/mm2), stop the machine.
6. Adjust the specifications according to different welding workpieces and welding positions. The following formula can be used in common welding specifications: V=0.04I+ 16 (allowable error 1.5V).
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