With the continuous improvement of environmental protection awareness, lead-free solder bar has become the mainstream products of the modern electronics industry. Compared to traditional lead solder bar, lead-free solder bar not only protects the environment better, but also has higher soldering performance.
Lead-free high-temperature solder bar is a new type of soldering material with excellent performance and a wide range of applications.It can not only meet the requirements of the modern electronics industry for environmental protection and efficiency, but also improve the reliability and stability of products.
This article will explain the advantages, application scope and market prospect of high-temperature lead-free solder bar.
What are leaded and lead-free soldering
Because lead is volatile at high temperatures, it will cause great harm to the environment and human health, so more and more regions have begun to promote lead-free soldering technology.
Lead-free solder bars are mainly composed of tin, silver, copper, antimony and other metals, of which the tin content is more than 95%.
In the electronics manufacturing industry, soldering is a common connection method, of which lead soldering and lead-free soldering are the two main types.
Lead solder: an alloy consisting of tin (melting point 232 degrees) and lead (melting point 327 degrees). The solder consisting of 63% tin and 37% lead is called eutectic solder, and the melting point of this solder is 183 degrees.
Lead-free solder: Sn tin-Ag silver-Cu copper melting point (217 °C) high, melting point high temperature (260±3 °C). Lead-free solder products are pioneers in green environmental protection, beneficial to human physical and mental health, and non-corrosive. The specific gravity is slightly smaller, similar to the specific gravity of tin, the fluidity is poor, and the service life of the soldering iron tip is short.
Problems with lead-free soldering:
The structure of the alloy itself makes it relatively brittle and less elastic than lead solder. The melting point of the liquid and solid phase of Sn-Zn alloy will increase, but as the mass of Bi increases, the melting interval of the solder will only expand, not shrink.
When Cu is added to Sn-Ag alloys, the eutectic point changes. When the mass fraction of Ag increases by 4.8% and Cu increases by about 1.8%, eutectic is generated, and if In is added to the alloy, it will cause the micronization strength and expansion characteristics of the alloy to be improved, and an oxide film will be formed on the surface, so the wettability is slightly worse.
What’s the the advantage of high-temperature lead-free solder bar
Traditional welding materials usually contain a lot of lead, which is a harmful substance that has adverse effects on human health and the environment. With the enhancement of environmental awareness, high-temperature lead-free solder bar has gradually become the mainstream products in the soldering industry. Compared with traditional solder materials, high-temperature lead-free solder bars have the following advantages:
1. Environmental protection and safety
Lead-free solder bars do not contain harmful lead elements, and there is no pollution and harm to human health and the environment.
In the process of production and use, it will not produce toxic and harmful waste gas, waste water and waste residue, which meets the requirements of environmental protection and safety.
2. Excellent high temperature performance
High-temperature lead-free solder bars have a high melting point and low melting, which can maintain stable performance in high temperature environments. Its melting point is usually above 250 °C, which can meet the requirements of high-temperature soldering without excessive heat on the soldering material and circuit board.
3. High welding reliability
The solder joint strength, soldering density and corrosion resistance of high-temperature lead-free solder bar are good, and the reliability and stability of the solder point can be achieved. It also has good fluidity and wettability, which can effectively fill the gaps and surface protrusions of the welding point, improving the integrity and strength of the weld.
Where is high temperature lead-free solder bar used for
High-temperature lead-free solder bars are widely used in electronics, communications, automotive, aerospace and other fields, mainly used for the soldering of electronic components, circuit boards, LED lamp beads, electronic devices and cables.
Its range of application has the following characteristics:
1. Electronics industry
High-temperature lead-free solder bars are one of the commonly used soldering materials in the electronics industry. It can be used for the soldering of various electronic components, such as transistors, integrated circuits, capacitors, inductors, resistors, etc. It can improve the stability and reliability of electronic products and reduce the failure rate of solder joints.
2. Automotive industry
High-temperature lead-free solder bar is also widely used in the soldering of electronic components in the automotive industry. It can improve the stability and reliability of automotive electronic products, and at the same time improve the waterproof and anti-vibration performance of automotive electronic products, and improve the adaptability and reliability of automotive electronic products.
3. Aerospace industry
High-temperature lead-free solder bar is also widely used in the aerospace industry.
What is the trend of lead-free solder bars
1. Continuous innovation in technology
The technology of lead-free solder bars continues to innovate, and a variety of lead-free solder bars have appeared.
In the future, with the continuous development of technology, the performance of lead-free solder bar will become more and more superior, and the application range will be more and more extensive.
2. Growing market demand
With the continuous improvement of environmental awareness, the market demand for lead-free solder strips is also growing.
In the future, lead-free solder bars will become the mainstream products of the electronics industry, and the market prospect is broad.
3. The industrial chain ecology is continuous
The production of lead-free solder strips involves multiple links, including raw material procurement, production and processing, sales, etc.
Lead-free solder bars are mainly composed of tin, silver, copper, antimony and other metals, of which the tin content is more than 95%.
1. Environmental protection and safety
2. Excellent high temperature performance
3. High welding reliability
1. Continuous innovation in technology
2. Growing market demand
3. The industrial chain ecology is continuous
