Method for surface peeling of powder superalloy

A high-temperature alloy and delamination technology, which is applied in the preparation of test samples, measuring devices, instruments, etc., can solve the problems of no obvious removal of delamination on the surface of powder superalloy, and can not meet the test requirements of residual stress on the surface of the sample. Eliminate the surface deformation disturbance layer, the removal effect is obvious, and the effect is easy to carry out
CN102759475AInactive Publication Date: 2012-10-31AECC AVIATION POWER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
AECC AVIATION POWER CO LTD
Publication Date
2012-10-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for the surface peeling of powder superalloy. An oxalic acid solution is taken as electrolyte, and by means of controlling corrosion voltage, corrosion current and corrosion time, the surface of the powder superalloy is subjected to corrosive peeling layer by layer until the residual stress of a sample is 0. The method disclosed by the invention is suitable for powder superalloy samples of different shapes and sizes, in addition, additional deformation cannot be caused by carrying out peeling removal on all surfaces of each sample, a surface deformation disturbance layer is easy to remove, and the method is simple to operate and carry out, obvious in removal effect and free from influencing a test result.
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Description

technical field

[0001] The invention relates to the field of corrosion processing of metal materials, in particular to a method for peeling off the surface of a powder superalloy. Background technique

[0002] When performing a material residual stress detection test, it is necessary to perform a peeling test on the surface of the material one by one according to a certain method, and then perform the test to obtain the residual stress curve of the material. There are usually two methods for peeling, one is mechanical and the other is electrochemical. Mechanical methods are prone to produce plastic deformation and crystal structure distortion on the surface of parts. These microstructural changes are likely to generate residual stress on the surface of parts and affect the accuracy of test results.

[0003] The closest existing technology to the present invention is electrochemical machining, which selectively and controllably removes metal through chemical reactions, and e...

Claims

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