Keywords: Q355NH steel plates, weathering steel engineering installation
There are three manual welding methods for Q355NH weathering steel engineering installation:
- Manual carbon arc welding
A groove is processed at the end of the workpiece waterway, and the periphery of the circular hole is milled into a single-sided V-shaped groove with an angle of about 45 ° and a groove depth of 3.5 to 4.7 mm. The material requirements of the 7 round plugs are the same as those of the workpiece, with a thickness of 4.9mm. The shape and dimensions of the cantilever river are the same as those of the weathering steel engineering installation. The preheating temperature of 890 ° C for weathering steel engineering installation uses DC positive pipe to improve the temperature of the workpiece. Welding current is 333A. Welding clamp adopts self-made water-cooled welding clamp.
- manual arc welding
When the
Q355NH steel plate thickness is greater than 4.6mm, it must be preheated before welding, and the preheating temperature is generally around 450-880 ℃. Use XZ-CF56 weathering steel for engineering installation and welding. The power supply should be DC reversed. Short arcs should be used when welding, and weathering steel engineering installation should not be used for lateral swing. The weathering steel is installed in a reciprocating linear motion to improve the formation of the weld. When welding, the slag between layers must be completely removed, and welding should be performed in a well-ventilated place. After the weathering steel project is installed and welded, a flat-head hammer is used to strike the weld to eliminate stress and improve the quality of the weld.
- manual argon arc welding
In the installation of manual argon arc welding of weathering steel engineering, the weathering steel engineering installation includes weathering steel engineering installation XZ-L76 and weathering steel engineering installation XZ-PS45. Before welding, the oxide film, oil and other dirt on the welding edge of the workpiece and the surface of the board must be cleaned to avoid defects such as pores and slag inclusion. When the weathering steel installation diameter of the joint is less than 7mm, in order to avoid incomplete penetration, generally no blunt edge is left. Welcome to send email to
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