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Detecting method for sample crystal grain and microstructure of GH4648 board

A plate sample and microstructure technology, applied in the field of testing and testing, can solve the problems of increasing the difficulty of the sample preparation process, incapable of sample inlay and sample preparation, etc., to improve the corrosion efficiency and detection efficiency, improve the preparation quality and efficiency, The effect of improving the finish

Active Publication Date: 2019-03-29
CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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AI Technical Summary

Problems solved by technology

The plates are all thin-walled parts, and electrolytic corrosion cannot be used to inlay samples for sample preparation. Manual grinding and polishing can only be used for grinding and polishing, which increases the difficulty of the sample preparation process.

Method used

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  • Detecting method for sample crystal grain and microstructure of GH4648 board

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Embodiment Construction

[0025] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings, but the required protection scope is not limited to the description;

[0026] Such as figure 1 Shown, detection method concrete steps of the present invention are as follows:

[0027] (1) After grinding the GH4648 plate test piece, put every 5 pieces into the sample mounting mold for sample mounting, and choose hot mounting or cold mounting according to the size of the test piece.

[0028] (2) Put the inlaid sample on the grinding and polishing equipment for grinding and polishing. After the grinding and polishing of the sample, dry it with hot air. There should be no visible grinding and polishing marks on the side light; if there are grinding and polishing marks, Needs to be re-polished.

[0029] (3) Corrosion of the specimen, see figure 1 As shown, first add an appropriate amount of water into the large beaker 2, and the water surface 5 must...

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Abstract

The invention provides a detecting method for a sample crystal grain and a microstructure of a GH4648 board, thereby improving preparation quality and efficiency of a high-power sample of the GH4648 board. Particularly, according to the method of the invention, an embedding sample is prepared in a manner of superposing multiple GH4648 boards; after polishing, the embedding sample is placed in aqueous solution which is composed of iron chloride and hydrochloric acid; furthermore corrosion liquid is preheated to 90-100 DEG C; and after corrosion, the crystal grain and the high-power tissue of the sample are observed through a microscope in a multiplying power of 100 or higher multiplying power. Compared with an existing testing method, the detecting method is advantageous in that the crystalgrain and the microstructure of the GH4648 board sample can be obtained without electrolytic corrosion; and furthermore, fineness of the sample before corrosion is improved, and corrosion efficiencyand detecting of the sample are improved.

Description

technical field [0001] The invention belongs to the technical field of testing and testing, and relates to a method for detecting grains and microstructures of GH4648 plate samples. Background technique [0002] GH4648 sheet is mainly used to manufacture components working below 800°C. Plates are often delivered in a hot-rolled or quenched state. It is difficult to corrode grains and microstructures with high-temperature alloy corrosives at room temperature. Electrolytic corrosion is often used to obtain their grains and microstructures during production and testing. The plates are all thin-walled parts, and electrolytic corrosion cannot be used to inlay samples for sample preparation. Manual grinding and polishing can only be used for grinding and polishing, which increases the difficulty of the sample preparation process. In view of the above problems, corresponding solutions are urgently needed. Contents of the invention [0003] The invention aims to provide a detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32
CPCG01N1/32
Inventor 熊勇陈昌达李永斌唐靖高芸杨玉川汤浩
Owner CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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