Vacuum heat treatment and subzero treatment integrated machine

Abstract

The invention relates to a vacuum heat treatment and subzero treatment integrated machine and belongs to the field of metal heat treatment devices. The vacuum heat treatment and subzero treatment integrated machine is characterized in that four door openings are arranged on the left lateral face and the right lateral face of a middle corridor chamber in a two-to-two symmetrical mode and provided with unsealing and sealing doors which are respectively connected with a material loading and unloading chamber, a vacuum high-pressure gas quenching heating chamber, a vacuum high-pressure gas quenching cooling chamber and a subzero chamber. One unsealing and sealing door is arranged at the outer end of the material loading and unloading chamber, and a rail for enabling a material conveying cart to move is arranged in the middle corridor chamber. A first solenoid valve and a second solenoid valve are arranged on the outer wall of the material loading and unloading chamber, a third solenoid valve and a fourth solenoid valve are arranged on the outer wall of the vacuum high-pressure gas quenching cooling chamber, and a fifth solenoid valve and a sixth solenoid valve are arranged on the outer wall of the subzero chamber. A gas storage tank is connected with a liquid nitrogen valve through a second stop valve, connected with the vacuum high-pressure gas quenching cooling chamber through a first stop valve and the third solenoid valve, and connected with the subzero chamber through a check valve, an air compressor, a sucking pump and the sixth solenoid valve. The vacuum heat treatment and subzero treatment integrated machine has the advantages of saving device investment, reducing material consumption and improving the production rate and product quality.

Description

technical field

[0001] The invention belongs to the field of heat treatment equipment for metal materials, and in particular relates to an integrated equipment capable of both vacuum heat treatment and cryogenic treatment. Background technique

[0002] Vacuum high-pressure gas quenching is a technology for surface hardening of metal parts. It has uniform hardening, small deformation, no damage to the surface finish of parts, and reduces the surface processing procedures after quenching, thereby improving production efficiency and reducing production costs. cost. At present, there are many patents related to vacuum high-pressure gas quenching equipment. Cryogenic technology is to continue the cooling process of the quenched metal material to a temperature much lower than room temperature, so as to promote the further transformation of retained austenite after conventional heat treatment into martensite, improving and refining the structure. At present, the research and deve...

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