4047 braze alloy sheet metal and strip have many characteristics such as high strength, low density, corrosion resistance, good thermal conductivity, high reliability, low cost, easy recycling and excellent brazing performance. In recent years...

4047 braze alloy sheet metal and strip have many characteristics such as high strength, low density, corrosion resistance, good thermal conductivity, high reliability, low cost, easy recycling and excellent brazing performance. In recent years, they have been widely used in aviation, automobiles, household appliances, The chemical industry and diesel machinery manufacturing and other fields, especially automotive radiator parts, such as water tanks, condensers, evaporators and fans, use a large number of 4047 braze alloy sheet metal and strips, and their market development space is broad.

Hot-rolled composite is a key process in the production of 4047 braze alloy sheet metal and strips. The process is complicated and there are many control elements, which directly affect the quality of the finished composite plates and strips.

The production process of hot-rolled brazed aluminum sheet and strip mainly includes ingot milling, homogenization heat treatment, core plate hot rolling, clad plate hot rolling, cladding operation, heating, hot composite rough rolling, hot composite finishing rolling, cold rolling , Finished to finished product.

In order to ensure the quality of hot-rolled composite, it is necessary to mill the base alloy and cladding alloy ingots first, and ensure that there are no defects such as deep groove marks, aluminum chips, slag inclusions, surface cracks and looseness. Residues on the surface DOI: 10.13979/j.1007-7235.2012.07.009 40 2012, Vol. 40, №7 The remaining oil, dust, metal oxide film and other contaminants must be cleaned by chemical and physical methods before rolling and compounding to facilitate rolling and compounding. The surface pretreatment process is generally: alkaline washing→room temperature water washing→neutralization washing→room temperature water washing→hot water washing→drying.