vacuum carburizing furnace Models: WZST-20, WZST-30, WZST-45, and WZST-60.It is gas-cooled and oil-cooled double-chamber ... horizontal vacuum heat treatment equipment. It is suitable for cemented quenching ... for oil-quenching, gas-quenching, annealing, brazing, sintering and other vacuum heat treatment processes of high-speed steel, high-alloy tool ...