Restoration method for eliminating heat treatment deformation of metal internal teeth

A technology of heat treatment deformation and repair method, which is applied to the repair field of heat treatment deformation of metal workpiece inner teeth, can solve the problems of high cost, uneven repair, low efficiency, etc., and achieves the effects of low cost, convenient operation and high efficiency

Inactive Publication Date: 2009-12-02
CHANGZHOU RUITAI ENG MASCH CO LTD +1
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Problems solved by technology

[0005] The purpose of the present invention is to solve the above technical problems and provide a low-cost and high-efficiency method for repairing the heat treatment deformation of the internal teeth of metal workpieces after carburizing and quenching. The method is simple to operate, does not require special repair equipment, and can quickly and batch Repair the reduction and deformation of the internal teeth of the metal workpiece after heat treatment, overcoming the shortcomings of traditional cutting methods such as high cost, low efficiency, and uneven repair

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  • Restoration method for eliminating heat treatment deformation of metal internal teeth
  • Restoration method for eliminating heat treatment deformation of metal internal teeth

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Embodiment Construction

[0049] The material of the metal internal teeth in the embodiment of the present invention is a ferrous alloy metal, and its main chemical components include Fe, Cr, Ni, Mn, Mo, C, P, S, and Si. The iron and carbon contained therein can be combined with nitric acid, respectively. The principle of chemical reaction with hydrogen peroxide replaces the traditional metal cutting and forming method to quickly correct the shrinkage and deformation of the internal teeth of the metal workpiece after heat treatment, so that many problems caused by traditional metal cutting can be avoided. At the same time, in order to prevent the non-repaired part of the metal internal tooth workpiece from chemically reacting with nitric acid and hydrogen peroxide, the non-repaired part of the metal internal tooth workpiece is covered and protected to form a protective layer. The protective layer can be made of non-metallic materials (such as plastic, petrolatum, wax, etc.). If only the repaired part of th...

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Abstract

The invention discloses a restoration method for eliminating heat treatment deformation of metal internal teeth, which comprises the following steps: performing covering protection on a quenched metal internal teeth workpiece according to required corrosion resistant materials, and only exposing parts needing restoring; contacting the metal internal teeth workpiece after the covering protection with acid corrosive liquid to generate chemical reaction; when the corrosive dissolution amount of the chemical reaction on the parts of the metal internal teeth workpiece needing restoring is equal to the swelling amount of the heat treatment deformation of the metal internal teeth workpiece, taking the metal internal teeth workpiece out; and cleaning the metal internal teeth workpiece, and performing rust-proof treatment. The invention provides a chemical processing method for the metal inner teeth surface with simple process, convenient operation, reasonability and high efficiency, which can quickly solve the problem of shrink deformation of the internal teeth of a metal workpiece after heat treatment without adopting the conventional cutting method.

Description

Technical field [0001] The invention relates to a repair method for eliminating heat treatment deformation of metal, in particular to a repair method for heat treatment deformation of internal teeth of a metal workpiece. Background technique [0002] With the rapid development of the machinery industry, the application of internal and external gear connection is more and more extensive, and the requirements are getting higher and higher. For metal internal tooth workpieces, especially carburized and quenched metal internal tooth workpieces, the heat treatment deformation of the internal teeth is inevitable and difficult to control, and the yield is low. In order to solve the problem of heat treatment deformation, the usual approach is to do heat treatment deformation process experiments in advance to find out a certain deformation law, and then make it by optimizing process parameters. Even so, there is still no guarantee that the finished products will pass with a high pass rate...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/02C23F1/16
Inventor 常安全张新国张磊
Owner CHANGZHOU RUITAI ENG MASCH CO LTD
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