The traditional lead brass has good mechanical properties and physical properties, as well as good cold and hot processing performance and cutting performance, and low price, so it is widely used in instrumentation, electronics, appliances, household hardware, drinking water systems In other areas, HPb 59-1 is the most used amount. However, the lead contained in drinking water system fittings and other discarded electronics and electrical appliances can easily enter the water body or the soil, and the human body will endanger its health when ingested. Therefore, the United States, Japan, and the European Union have all put forward corresponding restrictions on the lead content of these products. As of July 1, 2006, electronic, electrical products, and plumbing and hardware equipment exported to these countries and regions must meet the lead content specified in the regulations. Therefore, the research of lead-free and easy-to-cut brass is in the ascendant.
Tang Shengqi of Sichuan Wright New Material Science and Technology Co., Ltd. and Li Wenbing of Sichuan University's School of Materials Science and Engineering have controlled the zinc equivalent to 40% to 43% on the basis of traditional (α+β) two-phase brass. Between %, adjusting the Bi content, successfully developed a lead-free easy-cutting brass - Brass. With the use of traditional lead brass production equipment and similar production processes, it has successfully produced high-quality brass hot-rolled, extruded and drawn wire rods with excellent surface quality, cutting performance and mechanical properties. Exceeded the performance of lead brass.
RoHS Introduction The EU’s RoHS Directive is “The Directive for the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment.†This Directive requires that after July 1, 2006, six types of hazardous substances, namely lead, be introduced into the EU’s electromechanical products. The contents of cadmium, mercury, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers must not exceed the maximum limits specified in the RoHS Directive. That is, the limits for harmful substances except for cadmium are 0.01%, and the remaining five are all 0.1%.
The "lead-free directives" that the industry calls the "global manufacturing nerves" will have a huge impact on manufacturing, especially small and medium-sized electromechanical companies. It is reported that the EU is the second largest export market for electromechanical products in China. Last year, the export value reached US$90.48 billion, accounting for 21% of China's total exports of electromechanical products. The implementation of the EU RoHS directive will have a major impact on China's export of about 60% of electromechanical products to the EU. It is also understood that the upstream industry chain will also face an impact. Raw materials and components such as PCBs (electronic circuit boards), components, cables, mechanical parts, and accessories must meet the requirements of the RoHS Directive, otherwise products cannot enter the EU market. .
The implementation of the EU RoHS directive is both a challenge and an opportunity. If we can grasp the right time to take appropriate countermeasures, it will become an opportunity to promote the upgrading of enterprise products and expand exports.
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