Method for simply detecting CZ state 2A12 aluminum alloy over burning

[0028] As shown in Figure 1, the judgment diagram is a judgment diagram for overburned areas, non-overburned areas, suspicious areas, and corrosion-prone areas. According to the existing research results, it is known that the 2Al2 aluminum alloy is overburned at 500 °C. Considering the experimental error, it is determined that the area below 498°C is definitely not overheating, that is, the right side of Line 1; the area above 502°C is definitely overburning, that is, the left side of Line 2; the area between 498°C and 502°C is a suspicious area, It needs to be further tested by metallographic method, that is, the area between lines 1 and 2.

[0029] The abscissa in the figure represents the conductivity value, and the ordinate represents the hardness value; lines 3, 4, 5, and 6 represent the change curves of different cooling times (from 10 seconds to 120 seconds). Isotherms can be made by connecting the same temperatures in each line (such as lines A, B, and C). As long as th