Price Of Aluminium Foil 6mic
The principle of the double zero foil finish annealing system is usually for the purpose of double zero foil annealing, one is to obtain a certain degree of plasticity; the other is to obtain a bright, clean and oil-free surface quality. In the past, the main considerations for the formulation of the double zero foil finish annealing process , Is the recrystallization temperature of pure aluminum foil and the distillation range of rolling oil. Since the recrystallization temperature of pure aluminum foil is about 240~260℃, the distillation range of aluminum foil rolling oil is generally about 200~260℃, the annealing process developed in the past The annealing temperature is generally 300~400℃, and the annealing cycle is 10~40h. Due to the high temperature, the oil burns and the oil film carbon chain decomposes and oxidizes, which causes aluminum foil pollution and causes yellow-brown oil spots.
The shortcomings of the past double-zero foil annealing process. In recent years, the so-called low-temperature long-term annealing process has been gradually adopted. The annealing temperature is not less than 280℃ and the annealing time can reach 150h. Does the annealing temperature of zero foil have to be higher than the recrystallization temperature of pure aluminum foil? If the annealing temperature is lower than the recrystallization temperature, can it meet the user's requirements? What is the degreasing effect at low temperature? How to master the annealing temperature and time? It is a question that must be answered through tests to ensure that the mechanical properties and surface quality meet the requirements.
The formulation of the new annealing process is based on the main parameters of the annealing process is the annealing time, which mainly depends on the furnace load, the width of the foil coil and the coil diameter. The larger the furnace load, the larger the coil diameter and the wider the foil, the longer the annealing time. Under the premise of ensuring the degreasing effect, the lower the annealing temperature, the better, regardless of whether the aluminum foil is fully recrystallized. Meeting user requirements is the basis for formulating new annealing.
The application effect of the new annealing process is to carry out the annealing test of aluminum foil in a circulating air furnace. Taking into account the elimination of the edge drum defect of the aluminum foil roll, it is necessary to slow heating and slow cooling, and adopt a stepped heating system. According to the aluminum foil roll diameter and aluminum foil width Test annealing holding time; according to different annealing temperatures to investigate the mechanical properties of aluminum foil, the adhesion of aluminum foil and the degreasing performance of aluminum foil. The annealing test is combined with industrial production, and a 10t box-type circulating air furnace is selected. The heating power is 360kW, and the maximum heating temperature is It is 535℃. The alloy state of the test aluminum foil is 1235-O, the thickness is 0.006~0.007mm, the coil diameter is 300~500mm, and the width is respectively 350, 460, 520, 787, 920, 1024, 1216mm, and annealed according to the specifications of the test aluminum foil The time (heating + heat preservation + cooling) is 30~150h, and the annealing temperature is 180~300℃. The testing methods for the mechanical properties, adhesion and degreasing properties of aluminum foil are carried out in GB3198-1996 Appendix C~Appendix E. Tensile test equipment It is a ZLD-10 electronic tensile testing machine. The test results are shown in Table 1. According to the test data, after analysis and research, it is determined that the annealing temperature of industrial production is below 250 ℃, which can eliminate the sticky defect of aluminum foil. Table 1 Aluminum foil annealing test results comparison annealing Temperature/℃ σb/MPa δ/% Degreasing uncoiling characteristics 280~250 41~69 0.5~1.0 A grade easy to stick 240 73~89 0.5~1.0 A grade L≤200mm 230 76~91 0.5~1.0 A grade L≤200mm 220 87~98 1.0 Class B.
How Much Is Aluminum Foil There are many types of aluminum foil, and different uses,quality and price are also very different.
