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Retort furnace for heat treating metal workpieces

A metal workpiece and retort furnace technology, which is applied in the field of electric heating retort furnaces, can solve the problems of lack of convection part, which is decisive for gas heating and heating uniformity, and achieves the improvement of heat treatment efficiency, uniform heating and reduction of thermal induction load. Effect

Active Publication Date: 2011-09-07
IPSEN INTL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] 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

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Embodiment Construction

[0159] The variants of the invention are explained in detail on the basis of the following examples.

[0160] Variant I:

[0161] according to figure 1 with 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.

[0162] 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 reto...

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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

[0001] This divisional application is based on the Chinese patent application with the application number 200980128640.8 (PCT / DE2009 / 000963), the application date being July 13, 2009, and the invention name being "retort furnace for heat treatment of metal workpieces". . technical field [0002] 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 [0003] Retort furnaces of this type for the heat treatment of metal workpieces are already known according to the state of the art, eg according to DE-AS 2010433, DE-OS 2754034, DE 3028952C2, DE 3143532A1, DE 3631389...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/74C23C8/24C23C8/30
CPCC21D1/74F16K1/2007F27B5/12C21D9/0043F27D7/00F27D5/0056F16K1/20F27B5/06
Inventor R·扎勒斯H·施瓦尔
Owner IPSEN INTL
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