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What is the relationship between solder wire and solder bar?

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Update time : 2022-10-08 16:00:51
There are solder wires and solder bars in the soldering industry, so what is the relationship between solder wires and solder bars, where are they applied, and are the processes the same, as follows:
Solder wire is mainly divided into two types according to environmental protection standards, one is leaded solder wire, and the other is lead-free solder wire. The basic condition for solder wire welding is to melt the solder wire and convert the solid state of the solder wire into a liquid state. The required temperature is the melting point of the solder wire. When the temperature required for the melting of the solder wire does not reach its melting point, the solder wire is transformed from a solid state. In the liquid state, the wettability and solderability will lose their effect, and then the welding requirements will not be met.
The welding rod is also called tin rod because of its strip shape. It is also one of the most commonly used materials in electronic welding. According to environmental protection standards, it is also divided into leaded solder rods and lead-free solder rods.
Let's focus on some situations of solder bars:
The lead in the solder bar is an alloy composed of tin and lead. The melting point is 183 degrees. 50, etc., mainly used for fusion welding of wave furnace and tin furnace.
Lead-free solder bars are made of tin and copper alloys; common lead-free environmentally friendly solder bars, according to different components, include tin-copper environmentally-friendly tin bars (Sn-0.7Cu), tin-silver-copper environmentally-friendly tin bars (Sn-Ag0.3-Cu0 .7); According to different liquidus temperature critical points, environmentally friendly solder bars include high temperature solder bars and conventional solder bars, and another is lead-free pure tin bars.
1. The same point of solder wire and solder bar is that solder wire and solder bar belong to the same main material - tin.
Second, the differences between solder wire and solder bar are as follows:
1. From the appearance, it can be seen at a glance that the solder wire is formed as a filament and rolled on the reel, while the solder bar is formed in a strip.
2. The application scenarios of solder wire and solder bar are also different. Solder wire can be used for manual spot welding and automatic solder wire welding, while solder bar is used for wave soldering or tin furnace welding;
3. Some structures of solder wire and solder bar are different. For example, there is flux in the middle of solder wire, which can be directly used to weld electronic products, and the solder joints are very beautiful; and the material of solder bar is completely metal (tin, lead Or copper, etc.) without flux, so the solder bar should be used together with flux, which is more convenient when welding components.
4. The process of the solder bar in use is different. The antioxidant component in the solder bar is higher, but the solder wire does not.
The above is some small knowledge of solder wire and solder bar. I believe that after reading it, you will have a certain understanding of solder wire and solder bar. Production process needs to choose
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