Tin phosphor bronze has excellent comprehensive properties such as high elasticity, corrosion resistance, wear resistance, antimagnetic, easy brazing, and electroplating. It is one of the most widely used elastic copper alloy materials at present. In electronic and electrical equipment, it is widely used to make various components such as connectors, connectors, relays, contactors, wire terminals, contacts and springs.
In recent years, with the rapid development of electronics, instrumentation and communication industries, the market of tin phosphor bronze is also constantly changing and developing. Not only the demand has increased significantly, but the technical level and quality requirements of products are also gradually improving. Since the 1980s, on the basis of introducing, assimilating and absorbing foreign advanced equipment and technology of tin-phosphorus bronze strips, my country has transformed and built a batch of professional production lines with Chinese characteristics.
The new tin-phosphor bronze professional production line realizes induction melting, continuous ingot casting, high-precision cold rolling, computer control, non-oxidizing continuous annealing, combined cleaning, finishing, high-precision shearing, plate control, online quality control and rapid chemical composition analysis etc. The phenomenon of "reverse segregation" of tin phosphor bronze is easy to form in the ingot casting process, which makes it prone to edge cracks or surface cracks during cold rolling, resulting in increased waste, increased cost, and greatly reduced yield, which has become a thorny problem that plagues production. . In order to improve the quality of tin phosphor bronze and meet the production demand, it has certain theoretical and practical significance to study and discuss the problems in its production process.