Under the condition of keeping the die temperature at 160 ℃ and high extrusion speed of 0.4m/s, the pouring temperature of 580, 600, 620, 630 and 650 ℃ was selected to simulate the rheo squeeze casting. The results of simulating the probability defect parameters of wheel rheo squeeze casting parts are shown in the figure.

When the pouring temperature is between 580 ℃ and 600 ℃, the number of probability defects is large and the total area is relatively small; when the pouring temperature reaches 620 ℃, the core defects increase slightly, and the parts become narrower, and the defects at the intersection merge into slender shape; when the pouring temperature reaches 630 ℃, the length of probability defects at the intersection becomes smaller, but the probability defects at the center increase; when the pouring temperature reaches 630 ℃, the probability defects at the intersection become smaller, but the probability defects at the center increase When the temperature is 650 ℃, the probability defects at the narrowing intersection of the squeeze casting parts continue to decrease, and some of the probability defects transfer to the overflow trough, but the probability defects at the center increase significantly.

Therefore, when the die temperature is fixed at 160 ℃ and the extrusion speed is 0.4m/s, the pouring temperature with less probability defects can be achieved at 630 ℃.