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Retort furnace for heat treating metal workpieces

A technology for metal workpieces and retort furnaces, which is applied in the field of electric heating retort furnaces, can solve the problems of lack of convective parts that are decisive for the uniformity of gas heating and heating, and achieve the goals of improving heat treatment efficiency, easy replication, and improving charging capacity Effect

Active Publication Date: 2011-11-09
IPSEN INTL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The heat transfer from the heating element to the retort takes place exclusively by radiation, so the convective component that is decisive for the uniformity of heating in the case of gas heating is missing in the case of electrical heating

Method used

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  • Retort furnace for heat treating metal workpieces
  • Retort furnace for heat treating metal workpieces
  • Retort furnace for heat treating metal workpieces

Examples

Experimental program
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Effect test

Embodiment Construction

[0158] The variants of the invention are explained in detail on the basis of the following examples.

[0159] Variant I:

[0160] according to figure 1 and 2 , the retort furnace I.1 for the heat treatment of metal workpieces not described here comprises a metal horizontal tubular retort I.3 and a furnace hood I.2 surrounding the retort I.3. The retort I.3 has a gas-tight process chamber and material chamber I.10 for accommodating protective and reactive gases and a holding frame I.8 for positioning the material container, the process chamber or the material chamber for the workpiece (for example: materials) for heat treatment.

[0161] The furnace hood I.2 contains heating elements, not described here, which heat the retort I.3 and the treatment chamber or material chamber I.10 for the heat treatment of workpieces in protective gas. Furthermore, a fan unit not described here and a protective gas guide not described here in the retort furnace I.3 are contained in the retor...

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PUM

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Abstract

In order to increase the practical value and provide for increased availability of retort furnaces (I.1, II.1, III.1) for the heat treatment of metal workpieces using tubular retorts (I.3, II.3, III.3) surrounded by furnace housings (I.2, II.2, III.2), according to a first variant the weight of the batch is to be decoupled from the retort (I.3), according to a second variant a second circulation device (II.18.2) is to be arranged for heating elements (II.6) of the retort (II.3), and according to a third variant a bottom (III.9) of the retort (III.3) is to be equipped with a second bottom (III.9.1) and / or adjusting flaps (III.20, III.21). Combinations of the three variants create the prerequisites for a variety of designs of retort furnaces (I.1, Il.1, III.1), which increase the efficiency of the heat treatment of metal workpieces.

Description

technical field [0001] The invention relates to an electrically heated retort furnace for heat treatment, for example for bright annealing, nitrogen annealing or nitrogen / hydrogen annealing, nitriding or nitrocarburizing of metal workpieces, for which the retort furnace comprises a furnace hood and curved The structure of the neck retort, a heating device and a turning device also exists in various combination variants for increasing the efficiency of the heat treatment. Background technique [0002] Retort furnaces of this type for the heat treatment of metal workpieces according to the current state of the art, for example according to DE-AS 2 010 433, DE-OS 27 54 034, DE 30 28 952 C2, DE 31 43 532A1, DE 36 31 389C2 and DE 103 38 431 A1 already discloses various structures. [0003] The invention preferably uses a horizontal retort furnace which essentially consists of a flat lying tubular retort, an insulated mantle surrounding the retort and means for heating the retort...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00F27B5/12F27D5/00F27B5/16
CPCF27D7/00C21D9/0043C21D1/74F16K1/2007F16K1/20F27B5/12F27B5/06F27D5/0056
Inventor R·扎勒斯H·施瓦尔
Owner IPSEN INTL