Air cooling system for horizontal vacuum high-pressure air quenching

Abstract

The invention discloses an air cooling system for horizontal vacuum high-pressure air quenching. The air cooling system comprises a fan, an impeller, a volute, an air inlet pipeline, an air inlet channel, an air door I, an upper air channel, an upper small heat shield, an air door II, an air return channel, a heat exchanger, an air return pipeline, a lower air channel, a lower small heat shield and the like. The heat exchanger is arranged in a closed shell on an outer side of a furnace body and is connected in series in the air return pipeline; the upper small heat shield and the lower small heat shield are of translation structures and are driven by a cylinder, and the upper small heat shield and the lower small heat shield are closed during heating and opened during cooling; the air doorI and the air door II are installed in the air inlet channel and the air return channel separately, are translation type structures and are driven by the air cylinder. Through the movement of the airdoor I and the air door II, the air inlet channel can be communicated with the upper / lower air channel, and the air return channel is communicated with the lower / upper air channel, so that switchingof cooling airflow directions in the air quenching process is realized. And the cooling uniformity in the gas quenching process is improved, so that the uniformity of the structure and performance ofa workpiece is improved, and the deformation of the workpiece is reduced.

Description

technical field [0001] The invention relates to an air-cooling system for vacuum high-pressure gas quenching, in particular to an air-cooling system for horizontal vacuum high-pressure gas quenching which can realize alternate cooling of airflow up and down. Background technique [0002] Heat treatment is a process technology that gives or improves the service performance of the workpiece by changing the microstructure inside the workpiece, or changing the chemical composition of the workpiece surface, and fully exploits the potential of the material. Vacuum high-pressure gas quenching is a heat treatment technology developed in recent years. It uses inert gases such as high-purity nitrogen or argon as the quenching cooling medium. It has the advantages of cleanness, no pollution, no need for subsequent cleaning, and easy adjustment of quenching strength. It is widely used in aerospace, military industry, automobile and other fields. [0003] At present, vacuum high-pressur...

AI Technical Summary

Problems solved by technology

In the case of multi-workpiece loading, the 360° jet cooling along the circumferential direction will easily cause the external workpiece to cool quickly and the internal workpiece to cool slowly; while the one-way jet cooling of the airflow will gradually slow down the cooling speed of the workpiece along the airflow direction

[0004] The above two cooling methods are easy to cause uneven structure and performance on both sides of a single workpiece and between different workpieces, and large deformation of the workpiece

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