Aluminum alloy ring piston device

The utility model relates to a thermal treatment device of an aluminum alloy ring piston. The thermal treatment device comprises a quenching tank, wherein a suspended thermal treatment basket is placed into the quenching tank; a space for containing a plurality of work-pieces in parallel is formed inside the basket; a piston is placed into each work-piece; a movable lower blowing device is arranged on the thermal treatment basket. Particularly, the thermal treatment basket is a round basket; the movable lower blowing device is arranged on the quenching thermal treatment basket. Compared with the prior art, the thermal treatment device has the beneficial effects that the mechanical property of the pistons can be improved; the bond area rate of a durable ring of each piston and a corresponding aluminum piston body is improved.