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Method for measuring elemental niobium content of titanium-niobium alloy

A titanium-niobium alloy and element content technology, which is applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc., can solve the problem of not being able to find dissolved titanium-niobium alloy samples, and achieves good precision and simple operation. , the effect of reducing interference

Active Publication Date: 2014-09-03
AEROSPACE PRECISION PROD INC LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no standard method for testing the content of niobium in titanium-niobium alloy by inductively coupled plasma emission spectrometry, and in the actual detection process, there is no way to dissolve the titanium-niobium alloy sample

Method used

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  • Method for measuring elemental niobium content of titanium-niobium alloy
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  • Method for measuring elemental niobium content of titanium-niobium alloy

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Embodiment

[0027] S1. Preparation of titanium-niobium alloy solution: Weigh 0.1000g titanium-niobium alloy sample and place it in a 100mL polytetrafluoroethylene beaker, first add 20mL sulfuric acid (1+1), and place the beaker on a temperature-controlled electric heating plate Heating, during the heating process, drop 1mL of hydrofluoric acid into the beaker, stir until the sample is completely dissolved, then add nitric acid until the color of the solution disappears, after cooling, transfer the mixture into a 100mL plastic volumetric flask, and dilute with distilled water Constant volume to scale;

[0028] S2. Preparation of the solution to be tested: Take 10 mL of the titanium-niobium alloy solution in S1 into a 100 mL plastic volumetric flask, add 1 mL of the internal standard solution, and dilute 10 times with distilled water to a volume of 100 mL.

[0029] S3. Preparation of high-purity titanium matrix solution: Weigh 0.0500g of high-purity titanium into a 100mL polytetrafluoroethylene ...

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Abstract

The invention provides a method for measuring the elemental niobium content of a titanium-niobium alloy. The method comprises the following steps of dissolving a titanium-niobium alloy specimen by using sulfuric acid and a small amount of hydrofluoric acid, adding an internal standard solution, and after diluting to a certain volume, performing measurement by using an inductively coupled plasma emission spectrometer. Before the measurement, five niobium standard solutions with different concentrations are prepared, titanium substrates of the five niobium standard solutions are matched, the same amount of internal standard solution is added, a standard working curve is drawn, and the elemental niobium content of the titanium-niobium alloy is calculated with reference to the standard working curve. According to the method, the titanium-niobium alloy is completely dissolved, the internal standard solution is added to cancel measurement errors caused by the fluctuation of spectral line intensity due to the fluctuation of working conditions of an instrument, and a substrate matching method is used for reducing the interference of a substrate effect; by the measures, the accuracy of the curve is ensured, and the relative standard deviation is 0.29 percent; the method is high in precision and easy to operate, the elemental niobium content of the titanium-niobium alloy can be accurately measured, and quality guarantee is provided for the use of materials.

Description

Technical field [0001] The invention belongs to the field of analysis and determination of elements in alloy materials, and particularly relates to a method for determining the content of niobium in a titanium-niobium alloy. Background technique [0002] As a material for rivets, titanium-niobium alloy is characterized by high plasticity and excellent cold working performance. The shear strength and tensile strength of titanium-niobium alloy are higher than pure titanium, and its deformation resistance is lower than pure titanium. The alloy and Ti-6Al-4V alloy can be made into bimetallic rivets, which have been widely used in Airbus and Boeing aircraft. The chemical composition of materials determines the organization, and the organization determines the performance. The accurate determination of the content of chemical elements in the material and quality control of the material are important guarantees for the development, application and production of materials. At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28G01N1/38
Inventor 康元赵婕黄金湖
Owner AEROSPACE PRECISION PROD INC LTD
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