Three-chamber vacuum furnace for high-pressure gas quenching and isothermal salt bath quenching, and use method

Abstract

The invention relates to a vacuum heat treatment technology, and discloses a three-chamber vacuum furnace for high-pressure gas quenching and isothermal salt bath quenching, and a use method. The three-chamber vacuum furnace comprises three parts, that is, a gas quenching chamber, a heating chamber and a salt bath chamber, wherein the gas quenching chamber, the heating chamber and the salt bath chamber are sequentially connected; and the gas quenching chamber is mainly used for carrying out carburizing treatment on a heating workpiece under a vacuum environment or an inert-gas-charged environment, the heating chamber is mainly used for carrying out heating or preheating on the workpiece, a temperature achieves 900 DEG C and above, and then the workpiece enters the salt bath chamber and issubjected to salt bath treatment. A three-chamber mechanism is arranged in a split manner, convenient to repair and maintain, and capable of meeting the needs of different heat treatment processes. Ahorizontal conveying-taking mechanism realizes stable (slow-fast-slow) action through a double-speed motor, and is high in starting-stopping speed and short in workpiece conveying time. The three-chamber vacuum furnace is capable of completing the many processes of vacuum isothermal salt bath quenching, vacuum high-pressure gas quenching, vacuum low-pressure carburizing and the like. The main functions of the three-chamber vacuum furnace are capable of realizing the high-pressure gas quenching and isothermal salt bath quenching.

Description

technical field [0001] The invention relates to vacuum heat treatment technology, in particular to a three-chamber vacuum furnace for isothermal quenching in a high-pressure gas quenching salt bath. Background technique [0002] Salt bath furnace refers to an industrial furnace that uses molten salt liquid as a heating medium to immerse the workpiece in the salt liquid for heating (it can be heated in the salt liquid through metal electrodes). [0003] The current salt bath furnaces are all non-vacuum small furnaces. The workpieces placed in the heating crucible are small in size and limited in space. Finally, there are volatile substances that are more serious to air pollution. [0004] A single furnace type cannot be used for multiple processes at the same time, so that some parts with special requirements cannot meet the process requirements at one time. [0005] In view of this, the salt bath furnace of the present invention contains three functional chamber areas, whi...

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Problems solved by technology

[0003] The current salt bath furnaces are all non-vacuum small furnaces. The workpieces placed in the heating crucible are small in size and limited in space. Afterwards, volatile substances are more serious to air pollution

[0004] A single furnace type cannot do multiple processes at the same time, so that some parts with special requirements cannot meet the process requirements at one time

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