A. Hot shearing of long rods leads to residual air: The shear surface formed during hot shearing of long rods will never be perfect. Simple vertical hot shearing of vertical industrial Dongguan aluminum ingots will make the rods The bending was very serious, resulting in an oval cross section of the Dongguan aluminum ingot and a very large rounded corner that was cut off. Even with the latest type of long-bar hot shear, the angle of the edge of the bar being cut always produces rounds, and these rounds are the best place for air residue.
B. Upsetting results in residual air: Only when the diameter of the cylinder containing the aluminum ingot is larger than the diameter of the rod. Only the rods are enough to be placed in a cylinder containing aluminum ingots. After pressure is applied to the rods in the aluminum ingot cylinder, which causes the rods to expand to the diameter of the ingot cylinder, the gas carried in must be discharged. The gas does not come in, and it remains in the aluminum ingot and eventually turns into a bubble.
C. The contact of the two aluminum rods leads to residual air: because the surface of the two short-column rods is basically flat, the probability of carrying the air in is very small. The quality of the sawing directly interferes with the amount of air carried between the two short rods. At present, there is a new and high technology that can prevent two short rods from being connected. Proceed to eliminate the possibility of air ingress.
After finding the reason, we can find the answer from it. In order to reduce the trouble, it is recommended that everyone pay attention to every detail when producing.
The solid solution of aluminum ingot can significantly improve its physical properties, so that it has obvious improvement in strength, plasticity and corrosion resistance. The effect of solid solution is an important factor related to quality. Today we will look at the factors that affect the solid solution effect of aluminum ingots.
The main factors that affect solid solution are temperature, holding time and cooling rate. The primary factor of solid solution is the temperature. The temperature cannot exceed the overheating temperature of the alloy. Below this temperature, various elements can be incorporated into the aluminum as much as possible. In order to speed up the integration speed, step heating can be used. The holding time should be determined according to the type, composition and casting method of the aluminum ingot. The faster the cooling rate is, the better it is for the processing of the casting, and the higher the capacity of the casting.
In order to improve the solid solution effect of aluminum ingots, ensure the various properties of aluminum ingots after quenching, and the processing quality of castings, we must control various factors that affect the solid solution during production.
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