The higher the deformation degree, the lower the elongation and the higher the tensile strength.
Click https://www.xinyu-enameledwire.com/ for more detail about enameled wire.
The annealing of copper wire is commonly used in three ways: plate annealing; Continuous annealing on the drawing machine. A continuous annealing on the paint charter. Neither of the first two methods can meet the requirements of enameling process. The plate annealing can only soften the copper wire, but the oil is not complete, because the wire is soft after annealing, and the bending is increased when the wire is released. Continuous annealing on the wire drawing machine, although it can achieve the softening of copper wire and the removal of the surface grease, the soft copper wire wound around the line plate to form a lot of bending. Continuous annealing is not only the purpose of softening the oil, but the annealed wire is straight. It can be directly applied to the painting device and can be coated with a uniform paint film.
The temperature of annealing furnace depends on the length of annealing furnace, specification of copper wire and line speed. At the same temperature and speed, the longer the annealing furnace, the better the recovery of the conductor lattice. In the annealing temperature is lower, the higher the temperature, elongation, the better, but high annealing temperature occurs opposite phenomenon, the higher the temperature, the smaller the elongation, and conductor surface loses luster, even easy to brittle fracture.
The temperature of annealing furnace is too high, which not only affects the service life of the furnace, but also it is easy to burn off when the parking is finished and broken. Demands the highest temperature of annealing furnace control at about 500 ?. It is effective to select temperature control point in the position of static and dynamic temperature.
Copper easily oxidized at high temperature, copper oxide is a degeneration, paint film is not strong adhesion on copper wires, copper oxide has catalytic effect to coating aging, flexibility of Enameled Wire, thermal shock and thermal aging has bad influence. For copper conductors not to oxidize, the copper wires at high temperatures should not be exposed to oxygen in the air, so protect the gas. Most of the anneals were sealed and the other was open. The water in the furnace sink has three functions: the closed furnace mouth, the cooling conductor, and the steam to protect the gas. When driving, the water vapor in the annealing tube is too small to remove the air in time, and a small amount of alcohol solution can be poured into the annealing tube (1:1). (do not drink alcohol and control usage)
