Method for testing element distribution in alloy board

Abstract

The invention relates to a method for testing the element distribution in an alloy board. The technical scheme comprises the following steps of: firstly, taking a board with the diameter of 10-20mm from the test boards as a test sample, except for one surface, sealing other surfaces of the test sample with an adhesion agent; then, mixing a strong acid solution with the concentration of 20-50% and mercuric chloride in a glass vessel according to the volume ratio of 1 to (0.003-0.01) to obtain the test solution; adding 10ml of the test solution into a first beaker, weighing the mass m0 of the test sample, adding the test sample into the first breaker, stirring for 30-240s under ultrasonic shaking, taking out the test sample, washing the test sample with distilled water, drying, and weighing the mass m1 of the dried test sample; testing the concentration of each element in the test solution in the breaker by using an inductively coupled plasma optical emission spectrometer, so as to sequentially obtain the thickness delta H1 etched off for the first time and the concentration of each element; repeating the testing process, until the test sample is etched off completely, then, acquiring the element distribution conditions in the alloy board. The method can accurately test the element distribution in the alloy board.

Description

Technical field: [0001] The invention belongs to the technical field of metallurgical analysis, in particular to a method for testing element distribution in alloy plates. Background technique [0002] The distribution of elements in the alloy sheet is substantially inhomogeneous. Especially in the as-cast condition, due to the different specific gravity of each element, specific gravity segregation will be caused. In addition, the order of alloy solidification is different, which will also cause uneven distribution of elements. Even with homogenization, it is difficult to evenly distribute the elements in the sheet. Thus, non-uniformity is a ubiquitous problem in panels. And it is precisely this inhomogeneity that will seriously affect the mechanical, physical and chemical properties of the metal sheet. In most cases, people tend to require more uniform distribution of elements in the sheet. This requires understanding the distribution of elements in the plate to provi...

AI Technical Summary

Problems solved by technology

This requires understanding the distribution of elements in the plate to provide effective quantitative data for the improvement of smelting and heat treatment processes, but it is difficult to know the distribution of elements in the plate more accurately

[0003] At present, metallographic microscope and scanning electron microscope energy spectrometer are used to analyze the distribution of elements (Li Yusheng, Zhai Hu, Ma Baomin, etc. Research on "white spot" segregation of large castings of high-strength ZL205A alloy [J]. Casting, 2007, 56 (2 ): 185-187.), using a metallographic microscope for metallographic structure analysis, although it can be visually determined whether there is microstructure segregation, and the distribution of elements can be qualitatively analyzed, but the distribution of elements cannot be determined quantitatively, and The scanning electron microscope energy spectrometer can carry out qualitative and quantitative analysis on the distribution of elements, but in the case of small alloy element content, the scanning electron microscope energy spectrometer cannot measure or the measurement deviation is large, so it cannot be used for smelting and heat treatment processes. Valid Quantitative Data

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