Melting point and quality of solder wire

The premise of lead-free solder wire soldering is to melt the solder wire first, and then solder the solder wire and components. The melting point of solder wire is a physical property of a substance, and the melting point ofsolder wire is closely related to the melting point of solder content and alloy composition.

Lead-free solder wire can be divided into a variety according to the alloy composition, and its melting point is also different, the following are several commonly used alloy solder wire and its melting point: Sn-Cu series (the most common and commonly used), alloy Sn - 0.7Cu, melting point of 217 - 227 °C;  Sn-Ag series (usually rarely used due to high cost), alloy Sn-3.0Ag, melting point 221 °C;  Sn - Ag - Cu series is mainly divided into two types (due to the high cost, used for special component welding, less used): alloy Sn - 3.0Ag - 0.7Cu, melting point of 217 °C - 220 °C; Alloy Sn - 0.3Ag - 0.7Cu, melting point 217 °C - 220 °C.

In the actual production of electronic manufacturing, the correct selection of lead-free solder wire is crucial. For example, in the mass production of high-precision electronic products, due to the extremely high quality requirements of solder joints, it is necessary to consider various factors such as the melting point of the solder wire, the operating temperature, and the diffusion. If you choose a solder wire with an inappropriate melting point, it may lead to an error in the operating temperature setting, which in turn will affect the soldering effect. Like Sn-Ag series solder wire, because of its melting point of 221 °C, the cost is high and rarely used, but in some special electronic components with extremely high requirements for solder joint stability, if the cost factor is not considered, its higher melting point can provide more stable welding results.

Lead-free solder wire: Lead-free Kabel prajurit liquid phase temperature (about 217 degrees) + 130 degrees is more common, 365 ± 15 degrees is the working temperature of the solder wire, the operating temperature here refers to the temperature set by the soldering iron tip when the solder wire is manually soldered, and the soldering wire is converted from solid to liquid when the soldering time is 3-5 seconds. The higher the melting point, the higher the operating temperature, which is not fixed. Lead-free solder has poor solder diffusion, and the diffusion area is about 1/3 of eutectic solder. The melting point of lead-free solder is about 34 to 44 degrees higher than that of ordinary Sn-Pb eutectic solder, so the temperature setting of the soldering iron tip is also higher.

Solder wire soldering: In the electronic soldering process, the solder wire and the electric soldering iron cooperate with each other, the high-quality electric soldering iron can provide stable and continuous melting heat, and the solder wire is added to the surface and gap of the electronic components as a filler metal to fix the electronic components, which is the main component of soldering. The composition of solder wire is closely related to the quality of solder wire, which will affect the chemical, mechanical and physical properties of solder wire. Solder wire without additives cannot be soldered electronic components because it does not have wetting and expanding, spatter will occur when soldering, and solder joints are not well formed, and long-term studies have shown that the performance of additives will affect the performance of solder wire soldering.

Lead-free solder wire: When lead-free solder wire is soldered, according to the alloy melting point, soldering process and soldering method of the solder wire, it can be seen from the common manual soldering iron process that the melting point and the operating temperature are interrelated, and the melting point will directly affect the operating temperature. The solder wire produced by the double Chilean solder wire manufacturer, including environmentally friendly solder wire, nickel-plated environmentally friendly tin wire, silver-containing environmentally friendly tin wire, special agent environmentally friendly tin wire, rosin core tin wire, etc., the wire diameter and weight of the solder wire can be customized according to actual needs; If you have any questions about soldering needs and technical questions, you can pay attention to the online message of the solder manufacturers in Chile and interact with us. In the actual production of electronic manufacturing, the correct selection of lead-free solder wire is crucial. For example, in the mass production of high-precision electronic products, due to the extremely high quality requirements of solder joints, it is necessary to consider various factors such as the melting point of the solder wire, the operating temperature, and the diffusion. If you choose a solder wire with an inappropriate melting point, it may lead to an error in the operating temperature setting, which in turn will affect the soldering effect. Like Sn-Ag series Kabel prajurit, because of its melting point of 221 °C, the cost is high and rarely used, but in some special electronic components with extremely high requirements for solder joint stability, if the cost factor is not considered, its higher melting point can provide more stable welding results.

From the perspective of the soldering process, in the manual soldering iron process, the operator needs to adjust the operating temperature of the soldering iron tip according to the different alloy composition and melting point of the solder wire. For lead-free solder wire with high melting point, such as Sn-0.7Cu in the Sn-Cu series, the melting point is 217 - 227 °C, which requires the soldering iron tip to set a higher temperature and control the soldering time at 3 - 5 seconds, so as to ensure that the solder wire is smoothly converted from solid to liquid state and achieve good soldering results. At the same time, additives play an indispensable role in the welding process. High-quality additives can improve the wettability and propagation of solder wires, avoid spatter during soldering, and ensure that solder joints are well formed.

In terms of the production of lead-free solder wire, companies such as double Chile solder wire manufacturers that can provide various types of solder wire provide great convenience for users with different needs. Users can customize the wire diameter and weight of solder wire according to actual needs, whether it is environmentally friendly solder wire, nickel-plated environmentally friendly tin wire, silver-containing environmentally friendly tin wire, or special chemical environmentally friendly tin wire, rosin core tin wire, etc., which can meet the needs of users in different electronic welding scenarios. Moreover, the online message interaction provided by the manufacturer is convenient for users to solve the needs and technical questions about soldering, which helps users to better select and use lead-free solder wire, and further improves the quality and efficiency of electronic soldering.

In terms of the production of lead-free solder wire, companies such as double Chile solder wire manufacturers that can provide various types of solder wire provide great convenience for users with different needs. Users can customize the wire diameter and weight of solder wire according to actual needs, whether it is environmentally friendly solder wire, nickel-plated environmentally friendly tin wire, silver-containing environmentally friendly tin wire, or special chemical environmentally friendly tin wire, rosin core tin wire, etc., which can meet the needs of users in different electronic welding scenarios. Moreover, the online message interaction provided by the manufacturer is convenient for users to solve the needs and technical questions about soldering, which helps users to better select and use lead-free solder wire, and further improves the quality and efficiency of electronic soldering.