Tip 1:
The rule of thumb for the soldering temperature is: melting point of the wire + 120/140°C. This temperature at the soldering tip is perfectly sufficient to achieve good wetting. If the temperature is too high, the flux will decompose too quickly.
- The prerequisite for this is sufficient power at the soldering tip
- It must be possible to keep the set temperature as constant as possible
Example:
Sn60Pb40 = 183-190°C + 120/140°C = 310-330°C Soldering tip temperature (leaded)
Sn99.3Cu0.7 = 227°C + 120/140°C = 347-367°C Soldering tip temperature (lead-free)
Tip 2:
Do not increase the temperature, use a soldering iron with good control and higher power so that the energy flows faster.
Tip 3:
Optimizing the soldering tip -> as thick and as short as possible ensures optimum energy transfer from the heater to the soldering tip.
Tip 4:
Preheating reduces soldering time, prevents delamination of PCB material.
The five factors: temperature, solder, soldering time, flux and solderability can influence each other. It is essential to take each of these influences into account when determining the process so that optimum solder joints can be created.
Do you have any questions?
Lee Hatzikiriakos
