Soldering is a joining process used to join different types of metals together by melting solder. Solder is a metal alloy, usually made of tin and lead, that is melted using a hot iron.
The heat from the soldering iron attached to the temperature controller melts the solder and joins it together. It is heated to standard temperature and melted, waiting to cool down to form a solder joint.
In addition to creating a strong electrical joint, you can also use a desoldering tool to remove the solder.
Solder is a metal alloy used to create strong, permanent adhesive soldering; such as copper connections and copper pipe joint soldering in circuit boards that we often encounter.
Generally, tin is used in soldering, because it is a soft, malleable, silver-white microstrip light blue metal which has the advantages of chemically stable, easy to extrude, stretch, forge and cut, resistant to corrosion, easy to melt, low friction coefficient.
When soldering, the soldered joint will have impurities such as oil or dirt. Soldering flux helps prevent oxidation and also chemically reacts with impurities to clean the metal. The flux we generally use for soldering is rosin flux, which helps to increase the viscosity of the soldering and make the soldering more solid.
There are three types of soldering. The higher the soldering temperature, the stronger the soldered joint:
a. Soft solder (90 °C - 450 °C) Soft solder has the lowest melting point of the filler metal of all solder types. Since the temperature used in soft soldering is relatively low, it does little damage to the components around the solder, and it is also not suitable for high temperature use, as this type of solder would loses strength and melt.
b. Hard (silver) soldering (>450 °C) Silver or brass is the metal alloy used in this process, because its melting point is relatively high, to reach the melting point temperature, we need to use a blowtorch to reach its metal temperature.
c. Brazing (>450 °C) – The temperature of brazing soldering is much higher than that of soldering and brazing, however, like brazing, the metals being joined are heated rather than melted. Once both materials are sufficiently heated, you can place the solder metal between them and it will melt and act as an adhesive.
To complete a perfect soldering, first we should prepare the soldering tools, such as soldering station, soldering iron, tweezers, cleaning sponge, spare soldering iron tip, flux and so on.
Before soldering, we need to prepare the materials to be soldered, and it is also important that the soldered circuit boards be clean to prevent errors during soldering.
1. Turn on the power, pay attention to the temperature change of the soldering station, and wait for the temperature to reach the standard temperature
2. The first step is to tin the position where the components need to be soldered on the pad
3. Then use tweezers to clamp one leg of the component to be soldered with the left hand, and solder the remaining pins with tin wire.
4. After the tip of the soldering iron gently presses the soldered joint, quickly remove the tip and wait for cooling.
5. After cooling, check the degree of soldering of the soldered part, whether it is a spherical interface, and how bright the soldering is. If the soldering point is dark, it is necessary to check whether it is false or fake soldering. If it is, it needs to be re-soldered according to the above steps.
6. After the soldering is completed, turn off the power and place the soldering iron on the soldering iron stand. After waiting for it to cool down, unplug it.
How to solder electronic products requires us to have a certain soldering foundation. If you have not participated in any soldering projects, then you need to practice the basic skills of soldering on scrapped circuit boards. You can also watch related videos about soldering, which will help to improve your soldering skills.
The above are the methods that AiXun provides on how to weld. Soldering is not just about understanding soldering, but also requires us to participate in welding. If you have any questions about welding, please contact our soldering engineers. We will pair with One answer for you.
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