There are many reasons for deformation of zinc alloy and the effect of heat treatment is also great. See what the heat treatment will have and solve its problems.

1. The effect of heat treatment heating speed on die casting of zinc alloy
When quenching and heating, the faster the heating speed, the greater the thermal stress of zinc alloy die casting, it is easy to form deformation and cracking of zinc alloy die casting. Especially alloy steel and high alloy steel, due to their poor thermal conductivity, special attention should be paid to preheating. For some shape of disordered alloys, it is necessary to use repeated preheating.

2. The effect of temperature
The hardening property of the data is affected by the quenching temperature, which is jointly affected by the composition and grain size of austenite. From the aspect of hardenability, high heating temperature will increase the thermal stress, but together increase the hardenability, so the organizational stress will also increase, and gradually occupy the dominant position in the direction. From the aspect of austenite composition, the quenching temperature gradually increases the carbon content of austenite, while the square of martensite increases after quenching (specific capacity increases), and then increases the volume after quenching. Generally, it is not good to choose too much quenching temperature for deformation. Always select a lower heating temperature without affecting the function.

3. The influence of processing speed

Zinc alloy die casting is often used for grading or grading isothermal quenching, which is not completely hardened, so it is often based on the influence of thermal stress, which makes the cavity tend to shorten, but because the thermal stress is not very large, the deformation is relatively small. If water oil double liquid quenching or oil quenching is used, the greater the thermal stress is, the shorter the cavity will increase.

4. The influence of tempering temperature
The influence of tempering temperature on deformation is mainly caused by the structural transformation during tempering. If the phenomenon of "secondary quenching" occurs during tempering, the remaining austenite experience will be transformed into martensite due to the horse produced. The specific volume of austenite is larger than that of retained austenite, which will cause the expansion of the die casting cavity of zinc alloy.