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Method for rapidly judging silicon content in alloy

A technology of silicon content and alloy, which is applied in the detection field of silicon content in alloy, can solve the problems of uncertain test accuracy, formula method relying on experience, and lengthy test process, etc., to achieve the reduction of reagent consumption, shortening of operation process and cost reduction Effect

Pending Publication Date: 2021-09-17
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a quick judgment method for the silicon content in the alloy, which solves the problems of lengthy test process and large amount of reagents in the working curve method; the problem that the formula method relies on experience and the test accuracy is uncertain

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  • Method for rapidly judging silicon content in alloy

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Embodiment 1

[0028] The quick judgment method of silicon content in the alloy of the present embodiment comprises the following steps:

[0029] 1) For copper alloys, the acceptable range of silicon content in copper alloys is required to be [0.1wt%, 0.2wt%]. Weigh 0.0200 g of the copper alloy to be tested, 0.0200 g of the copper alloy with a known silicon content of 0.1 wt%, and 0.0200 g of a copper alloy with a known silicon content of 0.2 wt%.

[0030] Add 5ml of nitric acid to the weighed samples, heat to dissolve, then add 2ml of 10% ammonium persulfate solution, and heat to system boiling; cool to room temperature (eliminate the influence of temperature on constant volume) and then add 5% ammonium molybdate 20ml of solution, 20ml of 5% oxalic acid solution, 40ml of 5% ferrous ammonium sulfate solution, and finally set the volume in a 100ml volumetric flask, and develop color for 20min.

[0031] 2) Pipette the sample solution into a cuvette respectively, and use the solution without c...

Embodiment 2

[0037] The quick judgment method of silicon content in the alloy of the present embodiment comprises the following steps:

[0038] 1) For copper alloys, the acceptable range of silicon content in copper alloys is required to be [0.1wt%, 0.3wt%]. Weigh 0.0300g of the copper alloy to be tested, 0.0300g of the copper alloy with a known silicon content of 0.1wt%, and 0.0300g of a copper alloy with a known silicon content of 0.3wt%.

[0039]Add 5ml of nitric acid to the weighed samples, heat to dissolve, then add 2ml of 10% ammonium persulfate solution, and heat until the system boils; after cooling to room temperature, add 20ml of 5% ammonium molybdate solution and 20ml of 5% oxalic acid solution in sequence , 40ml of 5% ferrous ammonium sulfate solution, and finally set the volume in a 100ml volumetric flask, and develop color for 20min.

[0040] 2) Pipette the sample solution into a cuvette respectively, and use the solution without copper alloy as a blank control to measure th...

Embodiment 3

[0043] The quick judgment method of silicon content in the alloy of the present embodiment comprises the following steps:

[0044] 1) For copper alloys, the acceptable range of silicon content in copper alloys is required to be [0.05wt%, 0.2wt%]. 0.0100 g of the copper alloy to be tested, 0.0100 g of the copper alloy with a known silicon content of 0.05 wt %, and 0.0100 g of a copper alloy with a known silicon content of 0.2 wt % were weighed respectively.

[0045] Add 5ml of nitric acid to the weighed samples, heat to dissolve, then add 2ml of 10% ammonium persulfate solution, and heat until the system boils; after cooling to room temperature, add 20ml of 5% ammonium molybdate solution and 20ml of 5% oxalic acid solution in sequence , 40ml of 5% ferrous ammonium sulfate solution, and finally set the volume in a 100ml volumetric flask, and develop color for 20min.

[0046] 2) Pipette the sample solution into a cuvette respectively, and use the solution without copper alloy as...

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Abstract

The invention relates to a method for rapidly judging the content of silicon in an alloy. The method comprises the following steps: 1) aiming at alloys of the same type, respectively carrying out consistency pretreatment on a first alloy with known silicon content of m, a second alloy with known silicon content of n and an alloy to be detected, and correspondingly preparing a first alloy detection solution, a second alloy detection solution and an alloy to be detected detection solution for silicon molybdenum blue spectrophotometric analysis, m being greater than or less than n; (2) respectively detecting the absorbance of the first alloy detection solution, the absorbance of the second alloy detection solution and the absorbance of the to-be-detected alloy detection solution; (3) judging whether the silicon content of the to-be-detected alloy is between m and n. According to the method, the preparation of a silicon standard sample and the drawing process of a working curve in a traditional spectrophotometric method are omitted, and whether the silicon content is in a certain specific qualified interval or not can be rapidly judged; meanwhile, the operation process is greatly shortened, the reagent dosage is reduced, and the cost is reduced; the method has the characteristics of simplicity in operation, accurate result and good stability.

Description

technical field [0001] The invention belongs to the detection field of silicon content in alloys, and in particular relates to a rapid judgment method for silicon content in alloys. Background technique [0002] In industrial alloys, adding a small amount of silicon as an alloying element can significantly improve the viscosity and fluidity of the alloy. Adding a small amount of silicon to copper alloys can also improve processability, mechanical properties and corrosion resistance. In metal solder, adding a small amount of silicon can improve the performance of solder to a certain extent. However, the amount of silicon added is not as good as possible. In actual industrial production, it is usually necessary to clarify that the silicon content is within a certain qualified range, so the content of silicon element needs to be determined. [0003] At present, inductively coupled plasma spectrometer can be used to measure the silicon content in copper alloy, but this method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/3103G01N21/78G01N31/22
Inventor 龙伟民钟素娟聂孟杰程亚芳秦建董博文黄俊兰李文彬
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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