Lead, cadmium and other heavy metal elements pollute the environment and harm human beings: with the improvement of social and economic level and the enhancement of human awareness of environmental protection and health, the pollution of living environment and the harm of human health caused by lead, cadmium and other harmful elements have been highly valued by the whole society. According to the introduction of medical experts, because lead is a harmful element, it is not easy to be excreted after being ingested by the human body, and can cause all kinds of harm to the human body: damage the hematopoietic system, thus increasing blood pressure, hindering the synthesis of heme, leading to anemia; Affect the function of digestive system; Inhibit the function of immune system, affect liver, kidney and other organs, interfere with renal function and reproductive function, and irreversibly damage the brain, brain center and peripheral nervous system; The clinical manifestations of chronic poisoning are: emphysema, bone changes, anemia, and paralysis. Children, especially, are at high risk of lead poisoning because their digestive tract absorption rate is five times higher than that of adults. According to information disclosure, 30% - 40% of urban children's blood lead level exceeds the standard.
Lead free free cutting aluminum alloy
6020 T8 aluminum round bar is based on 6020 alloy. The harmful element lead (PB) is removed, the element bismuth (BI) is added, and the content of tin (SN) and bismuth (BI) is optimized to prepare a new environmental friendly lead free cutting aluminum alloy. Its chemical composition is as follows (weight): Si 0.40～0.9％ Fe 0.0-0.5％Cu 0.30～0.9％ Mn 0.0-0.35％ Mg 0.6～1.2％ Cr 0～0.15％ Zn 0.0-0.25％ Ti0.0～0.15％ Bi 0.4～0.7％ Sn 0.2-0.3% margin is al.
6020 T8 aluminum round bar is a kind of low melting point structure (eutectic) formed by Sn and Bi elements in the matrix to replace Pb element. The cutting process is discontinuous and easy to break, which can significantly improve the cutting performance of aluminum alloy. It not only has good cutting performance, but also does not contain lead harmful substances, which meets the requirements of environmental protection; At the same time, it also effectively improves the production efficiency, reduces the cost, and improves the product performance and surface finish.
6020 T8 aluminum round bar has the advantages of light weight, high strength, high precision, recyclability, easy processing and so on. The demand for aluminum alloy is showing a steady growth momentum. In addition to being widely used in civil buildings, it has been widely used in machinery, electronics, transportation, military industry, aerospace and other fields. With the improvement of living standards and the enhancement of environmental protection awareness, people pay more and more attention to health. The concept of lead-free further promotes the strong development of aluminum alloy in the world, especially the
6020 T8 aluminum round bar, which breaks through the technical barriers of EU ROHS directive, It will bring good news to the upstream industries of electronic and electrical production, such as electronic components, mechanical parts, accessories and other raw materials and parts, and has a very broad application prospect.
