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Vacuum high-pressure air quenching furnace liner structure capable of realizing up-down alternate switching of air currents

An alternate switching, high-pressure gas technology, applied in quenching devices, heat treatment equipment, manufacturing tools, etc., can solve the problems of uneven hardness, affecting the mechanical properties and service performance of the workpiece, and inconsistent cooling speed, and achieve the control of furnace temperature uniformity. Effect

Active Publication Date: 2018-10-12
BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using a one-way circulating furnace structure for gas quenching, within a cooling cycle, the heat exchange intensity of the parts of the work area that first contact and then contact the cooling air flow is inconsistent, which will cause inconsistent cooling speeds and temperature in the work area during the cooling process of the workpiece. Uneven, resulting in uneven hardness of the workpiece after heat treatment, difficult to control heat treatment deformation, affecting the mechanical properties and service performance of the workpiece after heat treatment

Method used

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  • Vacuum high-pressure air quenching furnace liner structure capable of realizing up-down alternate switching of air currents
  • Vacuum high-pressure air quenching furnace liner structure capable of realizing up-down alternate switching of air currents
  • Vacuum high-pressure air quenching furnace liner structure capable of realizing up-down alternate switching of air currents

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specific Embodiment approach

[0014] The preferred embodiment of the furnace structure of the vacuum high-pressure gas-quenching furnace capable of alternately switching the air flow up and down according to the present invention is as follows:

[0015] The furnace includes an outer frame with a square structure. There are heating elements, load thermocouples and temperature control thermocouples inside the furnace. The upper and lower parts of the outer frame are respectively provided with openings, and the two sides of the opening are provided with sealing doors. Guide rail, the door sealing guide rail is provided with a door seal, and the opening part of the lower part of the outer frame is provided with a material platform column and a material platform beam.

[0016] The opening size matches the cross-sectional size of the working area in the furnace, and the upper and lower sealing doors are facing the air outlet of the air cooling system.

[0017] The closed door is driven by a cylinder to slide alo...

specific Embodiment

[0022] Such as Figure 1a , Figure 1b , Figure 2a , Figure 2b As shown, the furnace adopts a square structure, including: an outer frame composed of a metal cylinder and a heat insulating layer 1, a heating element composed of graphite rods uniformly distributed along the space 2, molybdenum edge sealing 3, and both sides of the upper and lower parts It is composed of push-pull opening and closing sealing door 4, door sealing guide rail 5, upper and lower load thermocouples 6, temperature control thermocouples 7, material platform column 8 and cross beam 9, etc. The heat insulation layer is composed of ceramic fiber, soft carbon felt and hard carbon felt, and the evenly distributed heating element 2 can ensure the uniformity of the furnace temperature; the upper and lower sealing doors 4 are used to complete the on-off between the furnace heating space and the cooling and ventilation passage Switching; the door sealing guide rail 5 is used for the limit guide during the p...

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Abstract

The invention discloses a vacuum high-pressure air quenching furnace liner structure capable of realizing up-down alternate switching of air currents. The structure adopts a square closed structure, and comprises an outer frame consisting of a metal cylinder and a thermal insulation layer, heating bodies consists of graphite rods uniformly distributed, molybdenum sealing edges, double-side push-pull opening and closing sealing doors at the upper parts and the lower parts, sealing door guide rails, upper and lower load thermocouples, temperature control thermocouples, material table stand columns, cross beams and the like. The thermal insulation layer consists of ceramic fibers, soft carbon felts and hard carbon felts, and cooperates with the heating bodies, uniformly distributed, to guarantee the furnace temperature uniformity; the upper and lower sealing doors are used for switching furnace liner heating space and a cooling ventilation passage; and the upper and lower load thermocouples are used for controlling up-down alternate switching of the air currents. The furnace liner structure facilitates guarantee of the cooling speed uniformity of workpieces in different positions in the air quenching process, can improve such indexes as structure performance, hardness and deformation of the workpieces after heat treatment, can improve the uniformity, and reduces deformation.

Description

technical field [0001] The invention relates to a vacuum heat treatment furnace for high-pressure gas-quenching cooling of workpieces, in particular to a vacuum high-pressure gas-quenching furnace furnace structure capable of alternately switching up and down airflow. 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 technology uses inert gases such as high-purity nitrogen or argon as the quenching medium. It has the advantages of cleanness, no oil pollution, no need for subsequent cleaning treatment, easy adjustment and control of quenching intensity, and small deformation of the workpiece. It has developed rapidly in recent years. Vacuum high-pressure gas quenching process is mainly used to imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/773C21D1/62
CPCC21D1/62C21D1/773
Inventor 丛培武周有臣陆文林周新宇杜春辉崔红娟李勇王赫何龙祥尹承锟
Owner BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH