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Pre-vacuumizing controlled atmosphere heat treatment furnace

A pre-evacuation and heat treatment furnace technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of large gas consumption, achieve the effect of reducing gas consumption, avoiding disturbance, and good quality

Active Publication Date: 2021-12-10
江苏丰东热技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method mainly uses nitrogen for dilution and replacement, so the gas consumption is very large

Method used

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  • Pre-vacuumizing controlled atmosphere heat treatment furnace
  • Pre-vacuumizing controlled atmosphere heat treatment furnace
  • Pre-vacuumizing controlled atmosphere heat treatment furnace

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specific Embodiment

[0038] see figure 1 and figure 2 , this embodiment provides a pre-vacuum controllable atmosphere heat treatment furnace 100, which can reduce the gas consumption, and enable the workpiece to be heated, quenched or slowly cooled in an oxygen-less or oxygen-free environment, so that the quality of the processed workpiece can be improved. Good, and avoid the disturbance of the air to the heat treatment atmosphere, and reduce the intergranular oxidation of the workpiece during the heating and cooling process.

[0039] The pre-evacuation controlled atmosphere heat treatment furnace 100 provided in this embodiment includes a front chamber 110, a transition chamber 120, a heating chamber 130, a pre-evacuation device 140, a replacement gas introduction device 150, a pressure measurement device 160 and an oxygen probe 170, The heating chamber 130 is used to heat treat the workpiece, the front chamber 110 is used to cool the workpiece, the transition chamber 120 is connected to the he...

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Abstract

An embodiment of the invention provides a pre-vacuumizing controlled atmosphere heat treatment furnace, and relates to the technical field of heat treatment furnaces. The pre-vacuumizing controlled atmosphere heat treatment furnace comprises a front chamber, a transition chamber, a heating chamber, a pre-vacuumizing device, a replacement gas introducing device, a pressure measuring device and an oxygen probe. The pre-vacuumizing device and the replacement gas introducing device are arranged on the front chamber, a pre-vacuumizing ventilation method is adopted, when a workpiece is heated, quenched and slowly cooled, gas in the front chamber is pumped out through the pre-vacuumizing device, replacement gas is introduced into the front chamber through the replacement gas introducing device, and when the oxygen content is reduced to a second preset value, the front chamber and the heating chamber communicate with each other by opening a middle door, and the workpiece can be conveniently conveyed between the front chamber and the heating chamber. Compared with a conventional direct replacement method, the furnace has the advantages that through the mode of performing vacuumizing firstly and then replacing the gas, the gas does not need to be replaced slowly, so that the gas consumption of the replacement gas is effectively reduced, the replacement gas can be remarkably saved, and the gas replacement time is shortened.

Description

technical field [0001] The invention relates to the technical field of heat treatment furnaces, in particular to a pre-evacuation controllable atmosphere heat treatment furnace. Background technique [0002] The heating chamber of the existing ordinary controllable atmosphere heat treatment furnace uses a protective atmosphere to heat. During the heat treatment process of the workpiece, if there is excess gas in the furnace, it will cause oxidation of the metal surface. If the entire equipment is completely vacuum treated, the gas consumption will be large, and the production high cost. [0003] Existing equipment is mainly ventilated by filling nitrogen, that is, in a closed furnace, a gas that will not explode after mixing with the residual atmosphere in the furnace is continuously introduced into the furnace (often called flushing gas, which is some non-explosive gas) Non-combustible gases that chemically react with the residual atmosphere in the furnace, such as N 2 , ...

Claims

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Application Information

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IPC IPC(8): C21D1/74C21D1/773C21D9/00
CPCC21D1/74C21D1/773C21D9/00Y02P10/20
Inventor 朱海林束东方李健锋
Owner 江苏丰东热技术有限公司
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