Solder wireIt is a soldering material composed of tin alloy and flux. Lead-solder alloy is divided into tin-lead and lead flux, while environmentally friendly solder is made up of tin-copper alloy and lead-free flux. The main function of solder wire is to fill, repair or connect the primary soldering material between two electronic components. Can all materials be welded with solder wire? Today, the solder paste manufacturer will take you to learn about which ones are suitable for soldering?
Soldering principles and metals with high solderability
The principle of soldering is to heat and melt the solder, and then fully utilize the liquid "solder" to wet the base plate, filling the gap between the base plate and the electronic components. As the environmental temperature drops in recent years, it will gradually solidify, thus achieving the welding point to join the base plate and the electronic components together. Theoretically, the two would be bonded by metallic chemical bonds, presenting a continuous connection. However, under actual conditions, the base plate is eroded by air and the natural environment, thus forming an oxide film to block the "soldering", making it difficult to achieve a good wetting effect. This phenomenon is just like pouring water on a plate coated with grease, where the water can only concentrate in a certain area. It may lead to an inability to distribute it evenly and comprehensively on the plate. Therefore, not all raw materials can be connected through solder wire. Currently, only a small number of metals with good solderability (ultimately, they may all be soldered with tin) in the market can be connected through solder. For instance, materials such as copper and its alloys, gold, silver, zinc, and nickel have good weldability, while materials like aluminum, stainless steel, and cast iron have relatively poor weldability.
Properly handle metals with weak weldability
For some metals with poor weldability, our welding manufacturers also have different solutions. We can choose different metals and add different welding agents or rare metals to improve the welding performance. Therefore, products such as special welding wires for stainless steel and welding wires for stainless steel are conducive to the practical selection of these metal welding customers.
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