Welding, also known as welding, is a manufacturing process and technology that can join metal or other thermoplastic composite materials such as plastics by applying heat, high temperature, or pressure. There are three welding methods:
1. 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. Pressure must be applied to the welded parts during the welding process, which belongs to various metal materials and certain metal material processing.
3. Brazing. Metal structural materials with a melting point lower than the base metal can be used as a brazing material, wet the base metal with liquid solder, fill the joint gap, diffuse the base material, and realize the welding of connected weldments. It is suitable for welding and welding various active materials in enterprises. Different as well as metallic or non-uniform lead to welding of materials.
The welding temperature of low-carbon straight seam steel pipe is controlled at 1250 to 1460 degrees, which can meet the requirements of the pipe wall thickness of 3 to 5 mm. When the input heat resources are insufficient, the welding edge of the heated straight seam steel pipe cannot reach the required welding temperature, and the metal industrial structure can maintain a firm, forming non-melting or penetration; when the input heat is too large, the edge of the weld seam is heated To exceed the temperature of the welding environment, resulting in overheating of the weld or the formation of droplets.
A common feature of the 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 alloying elements and intrusion of harmful elements into the weld, which simplifies the welding process and improves the safety and hygiene conditions of welding. At the same time, due to the relatively low heating temperature and short heating time, the thermal influence is small. Many materials that are difficult to weld by fusion welding can often be welded into high-quality joints with the same strength as the base metal by pressure welding.
Post time: Dec-22-2022