The difference between lead-free and leaded welding stations

Lead-free welding platform manufacturers know that the welding platform is divided into lead-free welding platform and lead welding platform, but many people must not know why it is so divided, based on what is the most obvious difference between lead-free welding platform and lead welding platform is four aspects:

1, welding temperature difference:

The most direct difference is the difference in welding temperature, lead-free tin wire requires a higher welding temperature, generally about 250 degrees, while the ordinary solder wire welding temperature is 180 degrees, so the welding temperature of the lead-free welding table is higher, and the heating speed of the lead-free welding table is faster.

2. Difference in environmental protection degree:

Lead welding is economical and has been widely used before. However, lead is a harmful metal to human health, which has led to the topic of lead-free welding. Lead-free welding table can do not be polluted and become lead-free environmental protection products, so there is no need to worry about harm to the environment and the human body, lead solder is not environmentally friendly many export products are prohibited lead products.

3, the difference in price:

Lead welding is economical, lead-free welding relatively high price, the use is not popular;

4, raw material difference:

The difference between lead and lead-free solder paste is whether it contains lead, and the change in composition leads to a change in the physical property melting point and a change in wettability. When the flux is added to the lead solder paste, it is called lead flux, and when it is added to the lead-free solder paste, it is called lead free flux. It's not named for whether or not there's lead in the flux.

5, the difference in use:

Lead-free flux and lead flux, the difference is that the use, the composition of most of the same, a small number of components changed. In theory, lead solder joints can also be welded with a lead-free welding table, because the temperature of the lead-free welding table can reach the melting point of the lead solder. But in fact, no one uses it this way, because once the lead solder is welded on the lead-free welding table, the lead-free welding table is contaminated and can no longer do lead-free environmental protection products. Lead-free welding table has a wide range of uses, from common electronic appliances repair to electronic integrated circuits and chips will be applied to lead-free welding table as a welding tool, often used in electronic factory PCB solder. Especially suitable for lead-free precision electronic welding operations. With the gradual improvement of international environmental protection requirements, lead-free process has become an inevitable process for the development of the electronics industry. Although the lead-free process has been implemented for so many years, there are still some enterprises using the lead process, but the lead-free process completely replaces the lead, which is an inevitable result. However, some places in the use of lead-free process may be worse than the lead process, so we will study how to make the lead-free process better replace the lead process. Let rosh environmental protection more widely popularized, to achieve both profit and environmental win-win goals. At present, many large domestic companies do not completely adopt lead-free process but adopt lead-free process technology to improve reliability. We say that lead-free is not 100% lead-free, people often say that gold is not enough, the current standard is as long as the lead content does not exceed 1000ppm can be called lead-free. Secondly, you need to know that whether there is a lead welding table and a lead-free welding table, itself is lead-free, so why there is a lead and lead-free point, the reason is that the solder used in the welding table, before the lead-free welding table came out, the traditional welding table is used as a lead tin alloy as a solder, lead-tin alloy as a solder has a long history, it itself as a solder has unparalleled advantages, First of all, the lead tin alloy has good strength and fatigue resistance after soldering, and then the melting point of the lead tin alloy is generally low, and the fluidity after melting is better, and then the lead reserves are rich and the price is cheap. We all know that lead is toxic. The U.S. Environmental Protection Agency (EPA) has classified lead and its compounds as one of 17 chemicals that seriously endanger human life and the natural environment. Lead enters the food chain of animals and humans by seeping into the groundwater system. In daily work, the human body can absorb lead or its compounds through the skin, breathing, eating, etc. When these substances reach a certain amount in the human body, it will affect the normal synthesis of proteins in the body, destroy the central nervous system, resulting in nervous and regenerative system disorders, lethargy, anemia, mental decline, hypertension and even infertility and other symptoms; Lead poisoning is a heavy metal poisoning, in the human body it can not be excreted, and will gradually accumulate the problem, it is because of this, lead-free more and more human attention, lead-free solder came into being, and lead-free

Welding table is one of the tools of lead-free solder. So a variety of lead-free solder has been developed, but they all have a characteristic, that is, the melting point is relatively high, common lead tin composition of 63/37 melting point is 180°-185°, lead-free tin is 225°-235°, the melting point of the welding table put forward higher requirements, first of all, welding the same size of the solder joint, the need for more heat, second, In order to ensure welding quality and production capacity, welding of the same size solder joints, welding time can not be extended. Third, the welding temperature cannot be increased too much, because electronic components and PCB are more sensitive to high temperature, blindly increasing the temperature may burn the product, so compared with the traditional welding platform, the power of the lead-free welding platform is larger, and the thermal conductivity of the handle part is higher, so as to provide more heat at the same temperature

More heat, then, the temperature sensor of the lead-free welding table is more precise and close to the working part of the soldering iron head to detect and control temperature changes. Lead-free welding table has a wide range of uses, from common electronic appliances repair to electronic integrated circuits and chips will be applied to lead-free welding table as a welding tool, often used in electronic factory PCB solder. Especially suitable for lead-free precision electronic welding operations. There are many functions of the welding platform, which is also to adapt to the production requirements of the precision electronic processing industry, the general requirements are the following aspects:

1: The temperature locking function of the welding table can not have a large deviation.

2: Password lock function to prevent workers from accidentally changing the welding temperature.

3: Anti-static function, precision chip welding process needs to be strict on anti-static requirements.

4: Automatic sleep function, in order to extend the life of the iron head.

5: Temperature compensation function, temperature rise and return speed should be fast.

6: Digital display temperature, easy to adjust.

In fact, the main difference is the welding temperature, lead-free tin wire requires a higher welding temperature, generally about 250 degrees, while the ordinary solder wire welding temperature is 180 degrees, so the welding temperature of the lead-free welding table is higher, and the heating speed of the lead-free welding table is faster. Of course, there are exceptions, in lead-free solder, there are also low-temperature solders, whose melting point is lower than that of lead solder. But the price of this low-temperature solder is quite expensive. In fact, the general constant temperature welding platform has reached the requirements of lead-free welding, the welding temperature of the ordinary constant temperature welding platform can reach 450 degrees, such as the cxg80 intelligent lead-free welding platform, the maximum temperature can reach 450 degrees, which can fully meet the requirements of lead-free welding.