Continuous protective atmosphere heating high-pressure gas quenching furnace

Abstract

The invention discloses a continuous protective atmosphere heating high-pressure gas quenching furnace which is characterized by comprising a continuous protective atmosphere heating furnace, wherein the protective atmosphere heating furnace comprises a vacuum air exchange antechamber, a heating zone and a heat preserving zone; the heat preserving zone of the continuous protective atmosphere heating furnace is in sealed connection with a high-pressure gas quenching chamber; and the high-pressure gas quenching chamber is hermetically connected with a vacuum air exchange discharging chamber. The vacuum air exchange antechamber plays the roles of preventing the air entering the heating zone, shortening the air exchange time and reducing the nitrogen consumption; the heating zone and the heat preserving zone play the role of protecting the protective atmosphere heating furnace, wherein the protective gas can be nitrogen and methanol atmosphere or nitrogen and ammonia cracking gas; and the vacuum air exchange discharging chamber plays the role of preventing the air from entering the high-pressure gas quenching chamber. The furnace disclosed by the invention has the advantages of reducing the equipment investment cost and the energy consumption, increasing the high-pressure gas quenching intensity, increasing the equipment automation degree and reducing the labor intensity and the labor cost.

Description

technical field [0001] The invention relates to a continuous protective atmosphere heating high-pressure gas quenching furnace. Background technique [0002] At present, the heat treatment of low-carbon alloy steel carburized parts with high requirements for deformation and cleanliness adopts the following methods: the first step: slow cooling in a protective atmosphere after carburizing in an atmosphere furnace, or low-pressure carburizing in a vacuum furnace Then slow cooling or gas quenching (high temperature tempering); the second step: finishing; the third step: high-pressure gas quenching in the vacuum furnace. The third step generally uses a single-chamber vacuum furnace for single-furnace processing. figure 1 shown. The disadvantages of using a vacuum furnace are: the cost of vacuum furnace equipment is high; the heating chamber is repeatedly heated and cooled together, so the energy consumption is large; the quenching intensity of the workpiece is not enough due t...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to reduce equipment investment cost and energy consumption, increase the quenching intensity of high-pressure gas quenching; improve equipment automation, reduce labor intensity and labor cost

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