Abstract: Heat treatment of aluminum alloy has strict requirements for temperature tolerance and temperature synchronization, and the solution treatment process of clad aluminum alloy has special requirements for the recovery time. In order to find a solution to the problems of abnormal high and low points, temperature overshoot, poor recovery time and temperature synchronization existed in the 8 m long furnace for aluminum alloy heat treatment, the temperature measurement and control method of large bottom discharge furnace were investigated. The results show that the furnace can meet the strict temperature tolerance requirements and special recovery time requirements of aluminum alloy heat treatment only by feeding back the result of temperature uniformity survey to temperature control, choosing correct process sensor and locating it to right position, scientifically setting PID parameters and heating power.

Key words: clad aluminum alloy, recovery time, temperature gradient, PID parameter, temperature synchronization