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Rapidly developing lead-free solder paste products in smt soldering
Oct 24, 2022
10-24
2022
For lead-free solder paste, its metal composition is different in different application ranges. For example, silver-containing solder paste has relatively high conductivity, but the price is higher than that of tin-copper lead-free solder paste. In the process of SMT soldering in the electronics industry, solder paste has gradually evolved from lead to lead-free, mainly because lead-free solder paste is safer and healthier.
What are the characteristics and purchasing skills of special-shaped solder wire
Oct 24, 2022
10-24
2022
For special-shaped solder wire, use a thermometer to measure the temperature of the soldering iron tip before welding. The soldering process of lead-free tin wire should be as short as possible to avoid damage to the circuit board; and the flux should be able to solder all types of circuit boards and components.
What is the difference between solid crystal solder paste and lead-free solder paste?
Oct 24, 2022
10-24
2022
1. It is tin powder: choose No. 5 or No. 6 powder with very small particles.
2. Packaging: Most of the packaging is 30ml or 10ml syringe packaging.
3. Function: It is mainly used to replace the silver glue welding core.
4. It is a flux paste, which can be welded with semi-non-metallic materials. Understand the coating of the core piece to understand.
Principles and specifications for the use of lead-free solder paste
Oct 21, 2022
10-21
2022
Principles of use of lead-free solder paste:
1. The use of solder paste must give priority to the use of recycled solder paste and can only be used once, and then scrap the rest.
2. The principle of using solder paste: first use first (the remaining solder paste must be mixed with new solder paste when using the first time, and the mixing ratio of old and new solder paste should be at least 1:1 (the proportion of new solder paste is better, and it is the same) model same batch).
Introduction of solder bars
Oct 21, 2022
10-21
2022
Solder bars produced by solder bar manufacturers are refined from high-purity metal raw materials and are used for wave soldering and manual dip soldering of electronic products. Under the strict quality control system and advanced smelting process, the harmful substances in the modified products, such as copper, cadmium, sulfur, zinc, aluminum, iron and oxides, are effectively controlled. The punch truly ensures a good and reliable solder joint. Product features: bright solder joints, beautiful, reliable and less corrosive. Good fluidity, less residue and short welding time.
Causes and solutions of tin wire fried tin
Oct 21, 2022
10-21
2022
As we all know, the use effect of tin wire is very important, the experience of employees is very important, and everyone is concerned about safety issues. Today, we will talk about the reasons and solutions for tin wire fried tin.
The main reason for fried tin is that the viscosity of the flux is too low to inhibit the evaporation rate of the solvent. The solvent in the flux dipped on the PCB volatilizes, cooling the board surface, and the air in contact with the PCB is condensed to form a mist that condenses on the board surface.
Melting point of lead-free tin wire
Oct 21, 2022
10-21
2022
Lead-free tin wire is used for high temperature solder joints such as Luokou bulbs, and the melting point of lead-free tin wire is 217-227 degrees. As the melting temperature of the tin wire increases, the volatilization rate of the flux is also accelerated, which is likely to cause insufficient tin fluidity, resulting in tin tips, tin bridges or wire drawing, which seriously affect the soldering effect.
Setting of reflow profile of lead-free solder paste
Oct 20, 2022
10-20
2022
The setting of the lead-free solder paste furnace temperature curve is very important, and everyone must be careful. Only by mastering the method of how to set the furnace temperature curve of lead-free solder paste can we ensure that the lead-free solder paste is in the best state.
Attention should be paid to the temperature setting of the solder paste furnace:
How to solve the lead-free solder wire slag
Oct 20, 2022
10-20
2022
How to deal with the problem of excessive tin dross during the use of lead-free tin wire solder? For the hand dip furnace, the problem of excessive tin dross is not very normal, and this problem rarely occurs. The customer shows that the tin surface turns yellow or fades Purple, this situation may be that the furnace temperature deviation is too large during the operation of the customer. For example, the temperature is too high or the tin furnace has not been cleaned for too long, resulting in too much anti-oxidation loss and no effect. In this case, as long as Adding a small amount of anti-oxidant or cleaning the furnace, and then controlling the temperature of the tin furnace can be solved.
What is the difference between lead-free solder balls and lead-free solder balls
Oct 20, 2022
10-20
2022
People often confuse lead-free solder balls with lead-free solder balls, but they are not. The difference between lead-free solder balls and lead-free solder balls from solder ball manufacturers is the main difference in the mechanism of production. In addition, in terms of appearance and volume, the outer shape of lead-free solder balls is larger than that of lead-free solder balls, usually greater than 5mil in diameter. From the position of appearance, the lead-free solder balls are mainly concentrated in the middle of the chip component and the lower sides of the component body, while the lead-free solder balls are anywhere in the flux residue.
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