Research on Die Casting Process of AlSi7Mg Aluminum Alloy for Automotive

AlSi7Mg aluminum alloy specimens were die casted with different pouring temperatures and die preheating temperatures, and the mechanical properties of the specimens were tested and X-ray nondestructive analysis was carried out.The results are as follows: when the pouring temperature is 700℃, with the increase of the die preheating temperature from 150℃to 350℃, the strength of the test piece first increases and then decreases.The tensile strength of the specimen with the die preheating temperature of 250℃reaches the maximum value of 240.74 MPa, and the yield strength is 182.71 MPa.When the die preheating temperature is 250℃, the strength of the specimen also shows a trend of increasing first and then decreasing as the pouring temperature increases from 680℃to 720℃.Under the same conditions of other die-casting parameters, no obvious defects are observed in the X-ray non-destructive testing of AlSi7Mg aluminum alloy die-casting specimens poured at 700 ℃when the die preheating temperature is 250℃.