What are the technical characteristics of the brass strip application? Rectangular copper bar with large width, small thickness, small cross-sectional area, large surface area. Therefore, according to the skin effect of current, the carrying capacity is larger than that of the standard rectangular copper bar with the same cross-sectional area. Compared with the standard rectangular copper bar with the same cross-sectional area, the mechanical strength is relatively small and the impedance of the bus bar is relatively large. Larger busbar impedance increases the voltage loss on the busbar. Manufacturers through the brass strip processing is very thin, so as to save the copper consumption, improve the load capacity, in a certain degree of technical rationality. The copper bar in the dense busbar product is closely laminated, and there is no air gap between the brass strip, which is more conducive to the heat dissipation of the copper bar. Under the same specifications, the load capacity of the copper bar is larger than that of the bare laid in the air. At present, there is no load rate standard of each specification copper bar used in dense busbar, which objectively causes difficulties in reviewing whether the busbar product core material is sufficient.

The requirement of brass strip processing output is increasing, the product variety is expanding, and the product quality is more strict. It is understood that the heating process of brass strip includes loading temperature, heating temperature, heating speed, holding time, furnace gas composition and so on. If the heating is not proper, such as the heating temperature is too high and the heating time is too long, it will cause decarbonization, overheating, overburning and other defects. For the billet with large section size, poor thermal conductivity and low plasticity, if the heating speed is too fast and the holding time is too short, the temperature distribution is often uneven, causing thermal stress and cracking of the billet. The role of hot rolling mill for brass strip processing is to change the casting structure into processing structure through hot deformation, and to provide hot rolling coil with the smallest thickness as possible, excellent plate shape, higher surface quality, smaller dimensional tolerance fluctuation and qualified microstructure properties for the subsequent production processes such as high precision cold rolling. It is of great significance to the processing of brass strip.