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Measuring method for silicon in aluminium alloy

A measurement method, aluminum alloy technology, applied in the field of analysis and testing, can solve the problems of not meeting the requirements of silicon content detection, long analysis and measurement process, cumbersome operation steps, etc., and achieve the effects of protecting health, shortening the detection cycle, and high analysis efficiency

Inactive Publication Date: 2018-09-21
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the standard test method that can be used for the determination of silicon in aluminum alloys is silicon molybdenum blue photometry (wet chemical method). The determination range of this method is (0.050% ~ 1.00%), which cannot meet the detection requirements of silicon content below 0.050%.
In addition, a variety of reagents need to be prepared, and the analysis and determination process is long, requiring processes such as sample dissolution, alkali dissolution, acidification, constant volume, fractionation, and color development.
In addition, the inductively coupled plasma atomic emission spectrometry is used to measure the silicon content in aluminum alloys, which mainly uses sodium hydroxide to dissolve in alkali and then acidify. Difficult to guarantee
Especially for the accurate determination of silicon elements with a content of 0.001% to 0.50%, there is currently no reliable method for the accurate determination of silicon elements in aluminum alloys

Method used

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  • Measuring method for silicon in aluminium alloy
  • Measuring method for silicon in aluminium alloy
  • Measuring method for silicon in aluminium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Analysis of aluminum alloy standard samples Y1 and Y2

[0015] Step 1. Preparation of test conditions

[0016] 1.1: Instrument selection

[0017] It is determined that the full-spectrum direct-reading inductively coupled plasma emission spectrometer is the equipment for detecting the accurate content of silicon in aluminum alloys. The setting parameters of the equipment are: high-frequency emission power: 1300W, plasma gas flow: 15L·min －1 , Auxiliary argon flow: 0.20L·min －1 , Atomizer flow: 0.80L·min －1 , sample flow: 1.50mL·min －1 , observation height: 15.0mm, observation mode: axial, integration mode: three-point peak area to ensure the measurement accuracy of the spectrometer.

[0018] 1.2: Preparation of reagents

[0019] Hydrochloric acid: excellent grade pure, ρ is 1.19g·ml －1 ; Water: ultrapure water; hydrogen peroxide: excellent grade pure, ρ is 1.10g·ml －1 ;Single element standard solution: the single elements are manganese, copper, magnesiu...

Embodiment 2

[0038] Example 2: Analysis of Aluminum Alloy LD7-4

[0039] Step 1. Preparation of test conditions

[0040] 1.1: Instrument selection

[0041]It is determined that the full-spectrum direct-reading inductively coupled plasma emission spectrometer is the equipment for detecting the accurate content of silicon in aluminum alloys. The setting parameters of the equipment are: high-frequency emission power: 1300W, plasma gas flow: 15L·min －1 , Auxiliary argon flow: 0.20L·min －1 , Atomizer flow: 0.80L·min －1 , sample flow: 1.50mL·min －1 , observation height: 15.0mm, observation mode: axial, integration mode: three-point peak area.

[0042] 1.2: Preparation of reagents

[0043] Hydrochloric acid: excellent grade pure, ρ is 1.19g·ml －1 ; Water: ultrapure water; hydrogen peroxide: excellent grade pure, ρ is 1.10g·ml －1 ;Single element standard solution: the single elements are manganese, copper, magnesium, zinc, titanium, iron, chromium, nickel, concentration: 1000μg·mL －1 ;Sili...

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Abstract

The invention belongs to the technical field of analysis testing, and particularly relates to a measuring method for silicon in aluminium alloy. The measuring method for the silicon in the aluminium alloy includes the steps that after testing conditions are ready, interference of a base body and coexistence elements in silicon is determined with a same-base-body standard sample, then at least three silicon standard solutions having the silicon content mass concentration distributed according to the gradient and covering the silicon content of a to-be-measured aluminum alloy sample are prepared, an aluminum alloy sample is weighed and put into a high-temperature-resistant silicon-free container, and a to-be-measured solution is obtained after treating through hydrochloric acid and hydrogenperoxide; a silicon standard working solution is measured, a working curve is established, a linearly dependent coefficient is measured, and it is guaranteed that the linearly dependent coefficient ofthe silicon standard working solution is larger than or equal to 0.9995; the weight of the aluminum alloy sample and the volume of the to-be-tested liquid are input into an inductively coupled plasmaemission spectrometer, and the silicon content in the to-be-tested liquid is obtained after calculation through the working curve of the silicon standard working solution. The measuring method is simple in sample dissolving, short in time consuming, small in reagent dosage and small in environment pollution, and has the high accuracy.

Description

technical field [0001] The invention belongs to the technical field of analysis and testing, and particularly relates to a method for determining silicon element in an aluminum alloy. Background technique [0002] Aluminum alloys are widely used in aerospace, ships, vehicles and other fields. Compared with other alloy materials, aluminum alloy has the characteristics of low density, corrosion resistance, plasticity and good thermal conductivity. The silicon element added to the aluminum alloy is mainly used to improve the casting performance of the alloy. Silicon and aluminum can form a solid solution, improve the high temperature moldability of the alloy, reduce the shrinkage rate, and have no tendency to hot crack. When the silicon content in the alloy exceeds the eutectic composition, the hard spots of free silicon appear, which makes cutting difficult. Therefore, the silicon content should be strictly controlled, and it is required to accurately detect the content of si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 沈英姬李增乐薛强吴锐红何森虎
Owner SHAANXI HONGYUAN AVIATION FORGING