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Lead-free solder pasteWhat's the difference from leaded solder paste? Generally speaking, the ingredients of solder paste are different The melting points of solder paste are also different. Nowadays, many products in society must have a combination of solder paste/Welding materials. In many industries, lead-free solder paste is mostly chosen to replace the previous leaded solder paste. This is because people's awareness of environmental protection is getting stronger and stronger. What are the differences between the two and how to distinguish them? Let's talk about it with you from JJY Factory
Leaded solder paste and lead-free solder paste have different colors. Leaded solder paste is grayish black when opened, while lead-free solder paste is grayish white.
Leaded solder paste is divided into:6337Leaded solder pasteLEDSpecialized solder paste, specialized solder paste for stainless steel plates, and high-temperature high-lead solder paste - the alloy compositions of these types of solder paste are also different. Different manufacturers also have certain differences in their formulation and production processes.
The active ingredients of lead-free solder paste are:Sn,Ag,Cu,B iThe main components of lead-based solder paste are:Sn,PB, This alloy cannot be immediately identified by the average human eye. It needs to be tested with quantitative analysis instruments and equipment.
Lead-free solder paste is roughly divided into: high-temperature lead-free solder paste (alloy composition:Sn/Ag/CuMedium-temperature lead-free solder pasteSn/Ag/Bi), ultra-low temperature lead-free solder pasteSn/BiThe differences in alloy composition must be analyzed by professional technical testing equipment, which cannot be detected by the human eye.
That is to say, the amount of lead solder wire is much higher, and thus the temperature requirements for electric welding will be different. The soldering temperature of lead-free electric soldering is higher than that of leaded ones, and the temperature requirements for lead-free solder paste are also very strict. The soldering effect is better at a certain temperature, and the minimum and maximum temperature should be within200-205℃The range of the highest point temperature should be235℃. This one235℃The limited temperature precisely coincides with the maximum temperature values of electronic devices set by most electronic device manufacturers All. Therefore, the temperature control of lead-free reflow soldering furnaces is much more rigorous.
Leaded solder paste is still widely used in China at present. However, in international exports, lead-free solder paste is a must because Western countries such as Europe and the United States have requirements for circuit board assemblyRoHSAccording to the regulations, lead is extremely harmful to the human body and nature, so it must be followedRoHSThe energy conservation and environmental protection regulations. In the future development trend, it is inevitable that lead-free solder paste will replace leaded solder paste. In fact,Lead-free solder pasteAlthough leaded solder paste has certain disadvantages in terms of rationality and the overall range of electric soldering capabilities, this is merely a clear test for the soldering method.
The solder paste of Shenzhen JJY brand has gone through many years12A solder paste and wire manufacturer specializing in the annual research and development of solder paste, solder wire, solder wire, lead-free solder paste, leaded solder paste, solder rods, leaded solder paste, etc. Choose the solder paste manufacturer of JJY brand for solder paste.
