(1) High-frequency quenching: The weathering steel plate is put into the high-frequency coil and connected to the high-frequency current, which generates induced current in the workpiece. The high-frequency current concentrates only on the appearance of the weathering steel plate, so as long as the appearance of the weathering steel plate is heated. This heating and quenching method fa called high frequency induction heating quenching.
(2) flame quenching: this is to stop heating oxygen and other gases flame quenching method.
(3) carburising quenching: in order to achieve the purpose of only increasing the carbon content of the surface of the weathering steel plate, the weathering steel plate into the carburising agent, stop heating carburising quenching. Carbon, coke and other liquid carburising agent with zuo carburising agent CO waiting for gas carburising agent. When this carburising agent stops heating, the carbon element will penetrate into the appearance of the weathering steel plate, which will only make the appearance of the weathering steel plate into a high carbon weathering steel plate. The carburising quenching layer can be up to mm depth.
