Because of the great potential of CCA Wire Factoryfoil for air conditioner market, currently engaged in air-conditioning foilmanufacturers are more and more, air-conditioner foil in the future marketcompetition will become increasingly fierce, so as air conditioner foil manufacturers,while meet performance and surface quality requirements of the air conditionerfoil users, should try to reduce the production cost. Through the analysis ofthe content of manganese in materials chemical composition, to determine anoptimal control range, makes the subsequent pass can get excellent performanceat lower annealing temperatures in fire process, to a certain extent, canreduce the production cost.According to user requirements for airconditioner foil performance, decided to adopt the incomplete annealing processto meet the requirements of the products half hard state. The annealingtemperature selection generally determine the recrystallization temperature above100 DEG in the alloy at 200, but inorder to prevent coarse grain, surface oxidation, inhale and reduce therecrystallization texture and so on, should reduce the upper annealingtemperature or low temperature. The annealing time depends on the loadingamount, the thickness of the product, the temperature distribution and thethermal efficiency of the annealing furnace. Generally with increasingtemperature, the loading amount of annealing furnace inhomogeneity increases,product thickness increasing and reducing annealing furnace heat efficiency,annealing time to lengthen, all products but the furnace heat preservation timeshould not exceed the loading to the annealing temperature and the timerequired for the appropriate.Manganese powder as an important additive in alloy, can prevent aluminum alloy recrystallizationprocess, improve the recrystallization temperature, and can significantlyrefine recrystallized. Refinement of recrystallized grain is mainly through themanganese compound dispersoid particle on the recrystallization behaviorhinder. Another effect of manganese is forming compounds with iron impurities, reducethe harmful effects of iron, this is also the reason why the tensile strength ofalloy containing manganese is higher than the low content of manganese in thesame conditions. But with the increase of manganese content, therecrystallizing temperature increase, to achieve the same degree ofcrystallization need higher temperature to complete. Therefore, high containingalloy manganese at 325 can achievethe incomplete recrystallization annealing in this experiment, the elongation canmeet the requirements of air conditioner foil users, compared to the lowmanganese content alloy, annealing cost of equipment increases, therequirements of annealing furnace increases. But as the annealing temperaturecontinues to rise, reached 360,the refined grain is continue to grow up, macroscopic performance with thedecrease of the yield strength, elongation rate also fell, the sample in tensiletest can be observed obviously in "Snow", it said the brightannealing at this temperature exist significant grain growth trend.According to metal powder supplier, producedair-conditioning foil by alloy, the manganese powder content should becontrolled in 0.05%, annealing temperature at 290 canmeet requirements of performance. Manganese as an important alloying element,exists in the alloy can improve the crystallization degree, at the same time,improve the yield strength of the alloy.
