What is the difference of seamless aluminum tubes between air-cooled and water-cooled quenching?

- Jan 24, 2019-

Seamless aluminum tubes are generally processed in a fine processing process and can be processed by air-cooling and water-cooling quenching processes. So what is the difference between the two?

The quenching of the seamless aluminum tube is suddenly reduced from high temperature to low temperature for quenching. For example, the steel knife blade is hardened and sharpened in the water, and the quenching of the aluminum material is both water-cooled quenching and air-cooled quenching. The 6063 aluminum profile for construction is quenched by air-cooling, and the quenched aluminum profile is placed in the aging furnace for a certain period of time, the internal crystal of the aluminum profile is rearranged, and the mechanical strength is obviously improved. Among all metal alloys, only the aluminum alloy is in a aging state.

The forming temperature of the seamless aluminum tube extrusion profile is 460~500 degrees, and the temperature after quenching is generally required to be 200. After high-temperature extrusion molding, the state of artificial aging after solution heat treatment (quenching) is air-cooling (T5); it is cooled by a high-temperature extrusion molding process, and then the state of artificial aging is water cooling (T6).