Preparation method of spectrum standard sample for 1420 aluminum lithium alloy

Abstract

The invention discloses a preparation method of a spectrum standard sample for 1420 aluminum lithium alloy, which comprises the following steps: performing composition design, and weighing corresponding raw materials for melting according to the designed mass ratio; putting the raw materials for melting into melting equipment for melting; performing sampling analysis after melting, according to the analysis result, adjusting chemical components by adopting the method of adjusting chemical components step by step, finally adjusting the element Li, and adopting a solvent including LiF and LiCl for covering during adding Li; refining by adopting argon before casting, protecting a sluice by adopting argon during casting, and taking a segregation test piece and a metallographical test piece from a cast ingot by cutting for test; performing peeling, homogenization heat treatment and extrusion on the cast ingot conforming to the standards, and cutting the bar material formed through extrusion to obtain a standard sample. Through the adoption of the standard sample prepared through the method, the chemical component analysis and composition control on the 1420 aluminum lithium alloy can be realized, particularly the content of Na can be accurately tested, and the calibration standards can be provided for the normal production and quality inspection of aluminum lithium alloy.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy standard sample preparation, in particular to a method for preparing a 1420 aluminum-lithium alloy spectral standard sample. Background technique [0002] In the field of chemical composition detection of metal materials, photoelectric spectroscopic analysis has been more and more widely used due to its characteristics of fast, accurate, environmental protection, and easy operation. However, there is a prerequisite for using photoelectric spectroscopic analysis to analyze the composition of metal materials, that is, before the analysis, there must be corresponding alloy standard samples for drawing the working curve and correcting the analysis results to ensure the accuracy of the analysis results. [0003] In the prior art, due to the high price and difficulty in buying, the sodium-containing 1420 aluminum-lithium alloy does not have a dedicated spectral standard sample. When controlling a...

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Problems solved by technology

[0003] In the prior art, due to the high price and difficulty in buying, the sodium-containing 1420 aluminum-lithium alloy does not have a dedicated spectral standard sample. When controlling and analyzing its chemical composition, only the sodium-free general aluminum-lithium alloy standard sample can be used. For example, the analysis error is large, especially when there is a requirement for the content of sodium, because there is no corresponding spectral standard sample to trace the source, the spectroscopic method cannot be accurately analyzed, which brings great difficulties to the mass production of 1420 aluminum-lithium alloy

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