What precautions should be taken when using lead-free tin bars?

Lead-free tin barIt is an energy-saving raw material without lead-containing chemical substances, also known as low-carbon and environmentally friendly solder wire, which has been successfully developedSGSThe detection does not cause air pollution. What should be noted when using lead-free solder wire? Then, I, Jia Jinyuan, will reveal the secrets for you.

When using lead-free solder wire, it is necessary to be careful not to touch the road surface with your hands. Do not touch the battery charging, including the pen cap, as it is very likely to cause an electric shock accident. During the operation process, professional technicians should also wear protective clothing as much as possible. This is mainly because organic solvents of liquid types will be produced throughout the arc welding process, and it is more likely to be injured without wearing protective clothing.

When using lead-free solder wire in the work area, children should not be allowed to get close to it, and people around who are not familiar with the types of lead-free solder wire should not be allowed to touch it. Whether it is arc welding or disassembly, it must be carried out by the standardized staff in charge of product development. Besides understanding this, the welding process workers must also pay attention to the following aspects: 

One of the common questions: The melting point of lead-free tin bars is very important. Pay attention to many common melting points. The melting point is related to the metal composition of the solder rod. The melting point of the solder rod of tin alloy copper is227The ambient temperature during electric welding work is270to300In the middle. 

Common Question No. 2: Lead-free tin bars are just so-so It should be applied together with flux. Therefore, pay attention to the purchase of lead-free flux. It is necessary to choose flux with good vitality, heat resistance and no need for rubbing. This can also improve the welding efficiency in electric welding work. 

Common Question No. 3:Green and environmentally friendly lead-free solder wire furnaces should be applied. When using lead-free solder wire, whether it is a solder wire furnace or a solder wire flux, lead-free ones must be selected to meet environmental protection requirements and not be used together with lead-containing furnaces. 

Common Problem No. 4: Pay attention to the height-to-width ratio of the liquid level in the solder wire furnace. The amount of tin inside should neither be too much nor too little. Professional technicians should pay special attention to effective operation. Common Question No. 5: There are many types of lead-free tin bars. It is necessary to figure out which type of aluminum alloy chemical composition lead-free tin bar you are using, such as tin alloy copperSn99.3Cu0.7Or contain silver0.3Lead-free tin barSn99.0Ag0.3Cu0.7Or contain silver3.0Lead-free tin barSn96.5Ag3.0Cu0.5Or high-temperature lead-free tin strips, etc. The functions and applications promoted by different aluminium alloys may vary to some extent.

Secondly, after applying lead-free solder wire, the main power switch should be turned off in a timely manner. After the main power switch is closed, waterproof sleeves and other equipment cannot be stored quickly. They can only be sorted out after cooling. When storing, it is also necessary to pay attention to the dry storage space environment. The thick smoke formed during the entire arc welding process of lead-free solder wire is caused by the fusion of the solder wire in the flux and the high-temperature soldering iron. The solder wire additives contain rosin and chemical materials. If they adhere to the human body for a long time, it will cause safety hazards. It is strongly recommended to use exhaust fans as much as possible to keep the air circulating continuously.   

As is often mentioned, lead-based production and processing have better laser weldability than lead-free ones, but lead-free production and processing have a better concept of the natural environment. Want to know about itSMTFor any other problems regarding solder paste in surface mount technology, we warmly welcome you to consult us in ShenzhenJJYLet's learn and grow together, Industrial Production High-tech Co., LTD.!