A rapid detection method for the surface structure of nickel-based superalloy forgings, and a high-magnification structure corrosion solution

A nickel-based superalloy and detection method technology, which is applied in the field of high-magnification structure corrosion solution and rapid detection of the surface structure of nickel-based superalloy forgings, can solve the problems of missing abnormal grain structure, inspection is not in place, etc., so that the corrosion surface is clearly visible, Effect of reducing material loss and improving inspection accuracy

Active Publication Date: 2022-04-12
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the low-magnification structure corrosion inspection adopts the visual inspection method, it often occurs that the inspection is not in place and the abnormal grain structure is missed.

Method used

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  • A rapid detection method for the surface structure of nickel-based superalloy forgings, and a high-magnification structure corrosion solution
  • A rapid detection method for the surface structure of nickel-based superalloy forgings, and a high-magnification structure corrosion solution
  • A rapid detection method for the surface structure of nickel-based superalloy forgings, and a high-magnification structure corrosion solution

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preparation example Construction

[0066] In some preferred embodiments, the preparation method of the low-magnification tissue corrosion solution comprises: copper sulfate pentahydrate, concentrated H 2 SO 4 and HCl were added in turn, mixed evenly and set aside.

[0067] In some embodiments, the order of adding the components in the preparation of the low-magnification tissue corrosion solution is copper sulfate pentahydrate, concentrated sulfuric acid, and hydrochloric acid, and the mixture is stirred evenly to obtain the low-magnification tissue corrosion solution.

[0068] Add concentrated sulfuric acid to copper sulfate first, stir well, concentrated sulfuric acid can completely dissolve copper sulfate, then add hydrochloric acid. If hydrochloric acid is added to copper sulfate first, the dissolution of copper sulfate is not sufficient.

[0069] In some preferred embodiments, the forging to be tested is obtained through heat treatment, water immersion ultrasonic flaw detection and machining, and meets t...

Embodiment 1

[0112] A rapid detection method for the surface structure of a GH4720Li nickel-based superalloy disk forging:

[0113] After the disc forging is subjected to standard solution + aging heat treatment, it is judged by ultrasonic flaw detection that there is no metallurgical defect inside the disc forging that affects the service performance of the material, and after the surface flaw detection layer is machined, use clean water and absolute ethanol to clean the oil on the surface of the disc forging , and placed in a fume hood, using a fan to dry. Afterwards, the outer surface of the disc forging is subjected to low-magnification microstructure corrosion.

[0114] Among them, the low-magnification structural corrosion inspection is aimed at the entire outer surface inspection of the disc forging.

[0115] The specific steps of low-magnification tissue corrosion inspection are as follows:

[0116] (1) Low-magnification tissue corrosion

[0117] The disc forging is placed in th...

Embodiment 2

[0127] A rapid detection method for the surface structure of a GH4720Li nickel-based superalloy disk forging, the difference from Example 1 is that when the low-magnification structure is inspected in step (4), the surface structure is observed to be uneven, and the suspected coarse-grained structure is detected. Such as figure 2 , this step cannot judge that the forging of this plate is a qualified product, so it enters the high-magnification structure inspection.

[0128] The specific steps of high-magnification tissue inspection are as follows:

[0129] (1) Polishing treatment

[0130] Use sandpaper and diamond polishing fluid to polish the area where it is impossible to judge whether it is coarse grain or uneven structure after corrosion of the low-magnification structure, and then use a fan to dry it.

[0131] (2) High tissue corrosion

[0132] The disc forging is placed in the corrosion tank of the fume hood, the corrosion solution is applied to the local polishing a...

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Abstract

The invention provides a method for quickly detecting the surface structure of a nickel-based superalloy forging and a high-magnification structure corrosion solution, including: performing low-magnification structure corrosion and inspection on the processed forging surface: if the surface structure is uniform, it is determined that the surface quality of the forging is qualified; If there is a suspected coarse-grained or uneven structure on the surface, perform high-magnification corrosion on the part and use an in-situ metallographic instrument to check the metallographic structure: if no coarse-grained structure is found in this part, or the grain size of the part If the product rating requirements are not exceeded, the surface quality of the forging is determined to be qualified; otherwise, the surface quality of the forging is determined to be unqualified. The present invention can carry out high-magnification structure inspection on coarse grain and light and dark uneven structure without destroying the integrity of forgings, obtain clear corrosion surface and grain structure, achieve comprehensive screening of unqualified products and avoid wrong judgment due to false coarse grains The purpose of forging.

Description

technical field [0001] The invention relates to the technical field of preparation of high-temperature alloy forgings, in particular to a rapid detection method for the surface structure of nickel-based high-temperature alloy forgings and a high-magnification structure corrosion solution. Background technique [0002] With the improvement of the thrust-to-weight ratio of aero-engines, difficult-to-deform nickel-based superalloys such as GH4720Li nickel-based superalloys have gradually become the preferred materials for high-performance turbine disks. High service temperature and harsh service environment require disc forgings to have an extremely uniform grain structure. Coarse grains or mixed grains on the surface and interior of disc forgings will seriously affect the strength, creep and fatigue properties of service materials. If the abnormal grain structure is not detected in time during the production process of the disc forging, it will seriously threaten the safe use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/32C23F1/28
CPCC23F1/28G01N1/32
Inventor 孟令胜史玉亭曲敬龙杜金辉谷雨安腾毕中南王民庆
Owner BEIJING CISRI GAONA TECH
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