(1) Coarse Grains. Coarse grains often manifest as wheat-ear crystal structure. As mentioned above, due to the lack of active crystal nuclei in electrolytic aluminum liquid and superheated aluminum melt, the energy of homogeneous nucleation is higher than the energy of nucleation on the surface of the casting roller sleeve. Therefore, during the casting process, when [...]
Capacitor surface defects include: (1) Horseshoe cracks. As a typical capacitor surface defects, horseshoe cracks are easy to appear when the casting and rolling process is abnormal. Its distribution surface is large and dense, and it may appear in groups, and sometimes even expand to the entire plate surface. The probability of a single occurrence is small. This [...]
1 Quality inspection of casting and rolling process in capacitor foil rolling When the casting and rolling process is normal, the plate is inspected for quality. This operation is particularly important in capacitor foil rolling production. Chemical composition inspection: After the chemical composition adjustment is completed, take a sample from each furnace door in the mixing furnace [...]
1 capacitor casting dendrite structure During the casting process, crystals always grow in the form of dendrites, which easily form a cellular structure with strong directionality or a more obvious dendrite network structure. This phenomenon is particularly significant in the capacitor casting dendrite structure. When the electromagnetic field is introduced during casting, the cellular structure or dendrite [...]
1 Electromagnetic Casting and Rolling Technology of Capacitor Aluminum Alloy The electromagnetic casting and rolling process includes electromagnetic process parameters and casting and rolling process parameters, mainly including: excitation current, magnetic field strength, magnetic field oscillation frequency, magnetic field oscillation form, magnetic field switching frequency, which is suitable for the forming and organization control of capacitor [...]