Method for making and applying micro-porosity standard diagram of cast detected by fluorescence permeation

Abstract

The invention relates a method for making and applying micro-porosity standard diagram of a cast detected by fluorescence permeation, comprising the following steps: simulating the diagrams for different micro-porosity levels according to the characteristics of the micro-porosity of the cast; converting the simulating diagrams by software; and outputting the converted simulating diagrams to a printing paper subjected to fluorescence treatment to obtain the standard diagram capable of observing the micro-porosity levels clearly under black light or white light. During the cast inspection, the fluorescent display image of the micro-porosity of the cast is compared to the standard diagram to determine the level of the micro-porosity of the cast, and the inspection result is accurate.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and in particular relates to a method for making and applying a standard atlas for fluorescent penetrant testing of microporosity of castings. Background technique [0002] In engine manufacturing, there are a lot of casting parts. In order to ensure the safety of these casting parts in flight, it is necessary to carry out non-destructive testing on these casting parts, and fluorescent penetrant testing is the most widely used non-destructive testing conventional method One of the methods. Each non-destructive testing method has its own specific standard or comparison test block. The production methods and application methods of the test blocks of different testing methods are different, and the requirements for testing are also different. At present, there is no comparison test block that uses fluorescent penetrant testing to evaluate the microporosity level of castings. In pra...

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Problems solved by technology

At present, there is no comparison test block in China that uses fluorescent penetrant testing to evaluate the microporosity level of castings. In practice, inspectors judge the microporosity of casting parts based on experience, so they cannot be compared with the real ones. The size and grade of micro-porosity are consistent, so the size and grade of casting micro-porosity cannot be accurately determined, and the accuracy of non-destructive testing cannot be guaranteed.

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