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Solder wire welding method

Views : 116
Update time : 2022-12-15 16:10:13
Many people now know that solder wire is composed of tin alloy and additives. Different types of solder wire will produce different fluxes. The oil on the surface of the welding material will increase the welding area.
The welding methods of welding wire mainly include the following methods:
1. Fusion welding: It is a method in which the interface of the workpiece is heated to a molten state during the welding process and the welding is completed without pressure. During fusion welding, the heat source will rapidly heat and melt the interface between the two parts to be welded to form a molten pool. The molten pool moves forward with the heat source and cools to form a continuous weld that joins the two parts into one.
During fusion welding, if the atmosphere is in direct contact with the hot pool, the oxygen in the atmosphere will oxidize the metal and various alloying elements.
Nitrogen and water vapor in the atmosphere enter the molten pool, and in the subsequent cooling process, defects such as pores, slag inclusions, and cracks will be formed in the weld, which will deteriorate the quality and performance of the weld.
2. Pressure welding: It is under the condition of pressure to make two workpieces achieve atomic bonding in solid state, also known as solid state welding.
When the current passes through the connecting ends of the two components, the resistance is large and the temperature rises. When heated to a plastic state, they are connected into one under the action of axial pressure.
The common feature of various pressure welding methods is that pressure is applied during the welding process and no filler material is required. do not have a melting process, so there will be no beneficial alloying elements such as fusion welding burns, and harmful elements will enter the weld, thus simplifying the welding process and improving At the same time, compared with fusion welding, the heating temperature is lower, the heating time is shorter, and the heat-affected area is small. high-quality joints with the same strength as the wood.
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