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How many degrees should the lead-free tin bars be set properly during use?

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Update time : 2022-09-06 16:48:46
Generally speaking, we should set the appropriate degree during use. I believe that many technical experts will discuss this issue. The general temperature of lead-free solder bar welding is set to 280 plus or minus 10 degrees, because there is no preheating for manual dip soldering. , so the temperature setting is generally higher. The main components of the commonly used environmentally friendly tin bars are composed of 99.3% tin and 0.7% copper. They are solid, silver-white and odorless. For high-demand welding, widely used in wave furnace, hand dip furnace. The temperature of the environmental protection tin bar (peak temperature) is 270~300 ℃, and the lead solder bar depends on the lead content and the material of the components to be welded.
High temperature tin bar:
The liquidus temperature is higher than the melting point of the tin-lead eutectic (183 ℃) and can be kept without oxidation at a working temperature of over 450 ℃. The tin bar that can be soldered normally is called a high-temperature tin bar. High temperature tin bars are specially formulated additives added to tin-lead alloys, which can also play and oxidize at temperatures above 450 °C. The product is suitable for welding processes with high working temperature requirements. Such as: tin on the lead pins of the transformer, etc.
Low temperature tin bar:
For solders with a melting point lower than 183°C, different soldering processes can be provided, and solder alloys with different melting points can be provided.
High anti-oxidation solder bar:
At the soldering temperature below 300℃, the surface of the liquid energy solder is like a mirror surface, the wetting time is short, and the expansion rate is larger than that of ordinary solder. Due to the addition of anti-oxidation, the solder joints are bright and beautiful, and it is suitable for wave soldering and hot dip soldering of PCB.
Anti-oxidation high temperature solder bar:
Under the high temperature condition of 450℃, the surface of the solder can maintain a silver-white mirror state for a long time, and the amount of slag is only about 1/7 of that of ordinary solder. It is suitable for wave soldering and hot dip soldering, especially for the manufacture of various transformers. Tin enamel for self-dissolving enameled wire. The effect of low slag amount not only reduces bad solder joints, saves costs, but also reduces soldering maintenance opportunities.
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