(1) Quality type: fast cooling at high temperature stage, slow cooling at low temperature stage. That is, cracks are eliminated and quenching deformation is reduced.
(2) Environmental protection type: no toxic, harmful smoke or gas volatilization, not easy to burn, easy to clean the workpiece after quenching, no corrosion to the equipment, no irritation to burn the skin.
(3) Stable type: The performance of the workpiece is uniform and stable after quenching, and the performance of the medium itself is stable for a certain period of time.
(4) Economical type: high quality and good price, low energy consumption.