The electric soldering iron can be used to weld metal materials, and different metal materials can be soldered with different electric iron tips, which will also achieve different results. The tip of an electric soldering iron can be said to be a key part of the electric soldering iron and plays a key role to a certain extent. The electric soldering iron can not only be used for welding some building materials, but also has a wide range of applications in some industries and construction industries. Next, let's take a closer look at some pictures of soldering iron heads!
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Soldering iron head pictures
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　 Selection when using soldering iron tip
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For the selection of lead-free soldering temperature, consideration should be given to the thickness of the PCB board, the size of the pad, the device and whether there is a large heat dissipation area around it. It is recommended to use a temperature of about 350 ° C for conventional solder joints. The soldering iron should meet the requirements. The size of the head should be as large as possible, because the larger the welding tip, the greater the thermal capacity, the set temperature can be lower, and the heat loss is less. In this case, the welding speed will be relatively increased to ensure the welding quality.
After applying lead-free soldering, the life of the tip will be greatly shortened. The reason is that the structure of the general welding tip is composed of copper, and the outside will be coated with iron, that is, the iron plating layer. The front of the iron-plated layer will be plated with tin, that is, the tin-plated layer, and the rear end will be coated with anti-oxidation chromium. Since iron and tin are also highly active metals, they are easy to form mixed metals, especially at high temperatures. Moreover, the flux used during soldering, especially high-activity flux, is also a catalyst for forming mixed metal reflection. When welding, tin and iron will continue to produce a mixed reaction, and because the resulting mixed metal will peel off from the surface of the coating of the welding tip, the coating of the welding tip will gradually be eroded away, and then tin will quickly erode the copper in the welding tip In the end, it will cause the welding tip to penetrate the hole in a short time.
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Tip maintenance
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The new electric soldering iron needs to be tinned on the soldering iron tip when it is initially used to make the soldering smoother. The tin soldering method is: plug in the power supply and use tin wire containing rosin when the soldering iron tip temperature reaches 260 degrees Apply evenly to the tip of the soldering iron; repeat it a few times. It is forbidden to polish the tip of the soldering iron with a file or sandpaper, because it will damage the electroplated metal and greatly reduce the life. The correct method is to use a wet soldering iron sponge (Subject to no dripping) Repeatedly add tin and wipe on the sponge until the tip of the iron returns to metallic luster. The life of the soldering iron head is determined according to the number of solder joints, and the length of its life is related to the thickness of the plating on the head. The thicker the coating, the longer the life of the soldering iron tip, but the heat conduction efficiency will greatly reduce the life of the soldering iron tip.
The above is the content about the picture, selection and maintenance of the soldering iron tip. For soldering iron tips of the same temperature series, the life of the thin soldering iron tip is shorter than that of the thick soldering iron tip. The soldering iron head will inevitably wear on the surface when it is working. The thin soldering iron tip is more prone to wear and reduces the life of the soldering iron tip.
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