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Verification method for accuracy of alloy component detection result
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A technology of detection results and detection methods, applied in thermal excitation analysis, material excitation analysis, etc., to achieve the effect of effective verification of accuracy
Inactive Publication Date: 2019-08-20
SHANXI BADA MAGNESIUM
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However, there is inevitably a certain deviation between the test results of various detection methods and the true component content in the sample.
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[0039] The composition test results are shown in Table 1
[0040] Table 1
[0041]
[0042] The ingredient requirements are shown in the table above. During the smelting process of conventional magnesium alloys, the added component manganese will react with the iron element in the charge and tools and will be lost and separated from the melt; zinc will be separated from the melt due to gravity segregation and other reasons; beryllium will be used in the alloy smelting process The flux that protects the melt reacts and is lost from the melt. However, the amount of loss of various components caused by various reasons cannot be determined. The accuracy of test results obtained by ICP testing cannot be obtained.
[0043] Step 1) From pure magnesium ingot (Mg9995B), pure aluminum ingot (Al99.97), pure zincingot (Zn99.995), manganesepowder (DJMnP), aluminum...
[0053] The content of Al is about 2%, the content of Zn is about 2%, the content of Cu is about 2%, and the rest is magnesium. The composition of the sample is determined by ICP.
[0054] Implementation steps:
[0055] 1: Manually make simulated samples: weigh and physically mix the corresponding metal elements and magnesium ingots according to the proportions of Al 2.0%, Zn 2.0%, Cu 2.0%, and Mg94.0%, to make a sample; Carry out pretreatment and sample dissolution;
[0056]2. Measure the alloy sample with a read-only spectrometer: Al content is about 2%, Zn content is about 2%, Cu content is about 2%, and the rest is magnesium. The measurement results are: Al 2.1%, Zn 2.0%, Cu 1.3%. Al and Zn are very close to the theoretical values, so they are considered accurate. Since there is no corresponding standard sample for Cu element, it is not possible to judge whether the result is accurate.
[0066] The composition test results are shown in Table 2
[0067] Table 2
[0068]
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Abstract
The invention discloses a verification method for the accuracy of an alloy component detection result. The method comprises the following steps that a sample is weighed, different components are weighed accurately, and the theoretical content is calculated; mixing and sampling dissolving are carried out, a first detection method is used to carry out detection and obtain a first detection result, the first detection result is compared with the theoretical content, and the accuracy of the first detection method is verified; the first detection method is adjusted to obtain a second detection method, the second detection method is used to carry out detection, a second detection result is compared with the theoretical content, and the accuracy of the second detection method is verified; the above steps are repeated to obtain a detection method which can ensure the accuracy of the detection result; and contents of different components are adjusted, the detection method is used, and differentcontents of components of the same constituent element as well as a condition curve of the used detection method is obtained. The method can be used to verify results of component detection methods,which need preparation of dissolved samples, of an ICAP, a spectrophotometer, an atomic absorption spectrometer, a fluorescencespectrometer, titration and the like.
Description
technical field [0001] The invention relates to a method for verifying the accuracy of alloy composition detection results, and belongs to the technical field of chemical inspection and detection. Background technique [0002] In the fields of chemistry, metallurgy, medicine, chemical industry, etc., it is often necessary to use ICAP, spectrophotometer, titration, atomic absorption spectrometer, fluorescence spectrometer, etc. Component / ingredient batching, loss of each component / ingredient during preparation, and final product / sample composition results are monitored. [0003] Taking magnesiumalloymetallurgy as an example: [0004] Alloy grade: AZ91D. Composition requirements (wt): Al:8.7-9.3%; Zn:0.5-0.86%; Mn:0.18-0.22%; Be:0.0010-0.0015%; Si:≤0.06%; Fe:≤0.0030%; Cu:≤0.02 %; Ni: ≤0.0009%. [0005] In the actual smelting process, due to gravity segregation, burning loss and other reasons, the content of each element and the amount of ingredients will not match. It is...
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