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A furnace structure of vacuum high-pressure gas quenching furnace that can realize alternate switching of airflow up and down

An alternate switching, high-pressure gas technology, applied in quenching devices, heat treatment equipment, manufacturing tools, etc., can solve the problems of uneven hardness, uneven temperature, inconsistent cooling speed, etc., and achieve the effect of controlling the uniformity of furnace temperature

Active Publication Date: 2019-08-13
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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  • A furnace structure of vacuum high-pressure gas quenching furnace that can realize alternate switching of airflow up and down
  • A furnace structure of vacuum high-pressure gas quenching furnace that can realize alternate switching of airflow up and down
  • A furnace structure of vacuum high-pressure gas quenching furnace that can realize alternate switching of airflow up and down

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specific Embodiment approach

[0014] The vacuum high-pressure gas quenching furnace structure of the present invention that can realize alternate switching of air flow up and down, its preferred specific embodiment is:

[0015] The furnace includes an outer frame with a square structure. The furnace is provided with a heating element, a load thermocouple and a temperature-controlling thermocouple. The upper and lower parts of the outer frame are respectively provided with openings, and both sides of the openings are provided with sealing doors. The guide rail is provided with a sealing door on the sealing door guide rail, and a material table column and a material table beam are arranged at the opening part of the lower part of the outer frame.

[0016] The size of the opening matches the size of the cross-section of the working area in the furnace, and the outside of the upper sealing door and the lower sealing door face the air spray port of the air cooling system.

[0017] The sealing door is driven by ...

specific Embodiment

[0023] like Figure 1a , Figure 1b , Figure 2a , Figure 2b As shown in the figure, the furnace adopts a square structure, including: an outer frame 1 composed of a metal cylinder and a thermal insulation layer, a heating body 2 composed of graphite rods evenly distributed along the space, molybdenum sealing edge 3, upper and lower double sides It is composed of push-pull opening and closing sealing door 4, sealing door guide rail 5, upper and lower load thermocouple 6, temperature control thermocouple 7, material table column 8 and beam 9 and so on. The heat insulation layer is composed of ceramic fiber, soft carbon felt and hard carbon felt, and the uniform distribution of the 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 heating space of the furnace and the cooling ventilation passage. Switching; door guide rail 5 is used for limit guidance during the pushing and pu...

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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 performing high-pressure gas quenching and cooling on workpieces, in particular to a furnace structure of a vacuum high-pressure gas quenching furnace capable of realizing alternate switching between upper and lower air flow. Background technique [0002] Heat treatment is a process technology that gives or improves the service performance of the workpiece and gives full play to the potential of the material by changing the microstructure inside the workpiece or changing the chemical composition of the surface of the workpiece. Vacuum high-pressure gas quenching technology uses inert gas such as high-purity nitrogen or argon as the quenching medium, which has the advantages of cleanliness, no oil pollution, no subsequent cleaning treatment, easy adjustment and control of quenching strength, and small deformation of the workpiece. It has developed rapidly in recent years. The vacuum high-press...

Claims

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Application Information

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Patent Type & Authority Patents(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