What is the difference between lead-free solder paste and leaded solder paste?

Everyone knows that in some industries, welding assistance is indispensable, and this is where it comes in handySolder pasteThis can be further divided into lead-free solder paste and leaded solder paste. Some people think that there is not much difference between the two, as they are both used for soldering materials. In fact, there are differences between them. The difference between leaded solder paste and lead-free solder paste lies in the alloy powder,It is generally distinguished by the naked eye,It can be distinguished by color,It has lead and is grayish black in color,Lead-free, grayish-white. Make an accurate distinction.,It is to analyze whether the alloy powder contains lead. Lead-free solder paste is usually stored in green bottles. Also, open the cap and smell the odor. If the odor is strong, it is generally lead-containing solder paste. Now, the solder paste manufacturer will explain it to you:

The soldering temperature of lead-free solder is higher than that of leaded solder, and lead-free solder paste also has strict requirements for temperature. The soldering effect is the best at a certain temperature, and the lowest peak temperature should be at200-205℃The range and the maximum peak temperature should be235℃. This235℃The upper limit temperature is exactly in line with the maximum temperature values of components for most component manufacturers. Therefore, the temperature control of lead-free reflow soldering is much stricter.