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What is the appropriate temperature for welding straight seam steel pipes

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Welding, also known as welding, is a manufacturing process and technology that can join metal or other thermoplastic composite materials (such as plastics) through the application of heat, high temperature, or high pressure. There are three welding methods:

1. Fusion welding. The workpiece is heated to form a molten pool. After cooling and solidification, the molten pool can be connected, and filling materials can be added if necessary. It is suitable for pressureless welding of various metals and alloys in enterprises.
2. Pressure welding. During the welding process, pressure must be exerted on the welded parts, which belong to various metal materials and certain metal material processing.
3. Brazing. The use of metal structural materials with a melting point temperature lower than that of the base metal can be used as solder. The liquid solder is used to moisten the base metal, fill the joint gap, diffuse the base metal, and realize the welding of the connected weldments. It is suitable for the welding and welding of various activities of the enterprise. Different metal or uneven welding results in materials.

The welding temperature of low carbon steel straight pipes is controlled at 1250 degrees to 1460 degrees, which can meet the requirements of pipe wall thickness of 3 to 5 mm.

When the input heat resources are insufficient, the welded edge of the heated straight seam steel pipe cannot reach the required welding working temperature, and the metal industrial structure can remain firm without melting or penetration; when the input heat is too large, the weld edge is heated to exceed the welding environment temperature, resulting in overheating of the weld or formation of molten droplets.

A common feature of various pressure welding methods is the use of pressure without filler material during the welding process. Most pressure welding methods, such as diffusion welding, high-frequency welding, cold pressure welding, etc. There is no melting process, so there is no problem of burning loss of alloy elements and intrusion of harmful elements into the weld, simplifying the welding process and improving the safety and health conditions of welding. At the same time, due to the relatively low heating temperature, the heating time is short and the thermal impact is small. Many materials that are difficult to weld by fusion welding can often be welded through pressure welding to form high-quality joints with the same strength as the base metal.




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