Hollow blade intracavitary residue detection method

A technology for hollow blades and redundant objects, which is applied in the pretreatment of hollow blades before neutron photography, and in the field of detection of redundant objects in the inner cavity of hollow blades. , a wide range of prices, the effect of simple process
CN110426255AInactive Publication Date: 2019-11-08GUIYANG AVIC POWER PRECISION CASTING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIYANG AVIC POWER PRECISION CASTING
Publication Date
2019-11-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of nondestructive detection, and discloses a hollow blade intracavitary residue detection method which is applied in neutron radiography, and includes thefollowing main steps: (1) preparing 10%-20% of a gadolinium nitrate aqueous solution; (2) placing a to-be-detected hollow blade into the gadolinium nitrate aqueous solution, soaking the to-be-detectedhollow blade at a vacuum degree of 0.07-0.09 atm for 6-8 hours; (3) continuously washing the to-be-detected hollow blade in a 24-64KHZ ultrasonic tank for 5-15 minutes; and (4) drying the be-detectedhollow blade at 80-100 degrees by baking. The to-be-detected hollow blade processed by the method is subjected to neutron radiography, and intracavitary residues of the hollow blade, including a residual core, residual iron powder produced after powder filling detection, and impurities sucked by the blade after long working hours, can be removed effectively. The method is simple in process, low in cost and accurate in detection results, and avoids erroneous judgement and missed judgment caused by other detection methods.
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Description

technical field

[0001] The invention belongs to the technical field of non-destructive testing, and relates to a method for detecting redundant objects in the cavity of a hollow blade, which is specifically applied to the pretreatment of the hollow blade before neutron photography. Background technique

[0002] In the process of investment precision casting, the cooling channels with complex shapes and tortuous inner chambers of high-efficiency air-cooled blades need to be formed by prefabricated ceramic cores with complex shapes. The key to casting high-efficiency air-cooled blades is to form complex cooling channels inside the blades. Preparation of ceramic cores. The cooling channels inside the high-efficiency air-cooled blade are very complex, resulting in a very complex shape of the ceramic core that forms the cavity inside the blade. The inner cavity channel is formed after the core removal process of the blade casting, and there are often some residual ceramic cores,...

Claims

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