Abstract:

This paper introduced the pressure stabilizing device used for heat treatment carburizing furnace and working device used for vertical hoisting and quenching.The combination of both the above devices improved the performances of die sleeve lower hardness and diameter size distortion out of tolerance caused by unstable and volatile pressure for carburizing furnace.As a result, the furnace pressure were stable,the quality of products after heat treatment and production efficiency were improved,and the production cost were reduced.