What are the new cooling methods for 高周波焼入れ機?

There is a tool heat treatment process called double-liquid quenching process. For example, high-carbon steel tools that are easy to crack are water-quenched and oil-cooled. The purpose is to quickly cool with water in the unstable austenite area, and use oil in the martensitic transformation area to slow down. Cold, solve the problem of workpiece quenching and cracking. This process is very effective, and the “controllable intermittent cooling” quenching process is now used for steering knuckles, hubs and other parts, and the “controllable intermittent cooling process and equipment” has been developed. And control the cooling time and interval cooling time. Its essence is double-liquid quenching and self-tempering, but it is controlled and guaranteed by reliable installation device for pressure, flow and time, which opens up the way to solve the quenching crack of induction quenching. new way.