Method for simultaneously determining W, B and Nb in high-alloy deposited metal

Abstract

The invention discloses a method for simultaneously determining W, B and Nb in a high-alloy deposited metal. The method comprises the following steps: placing a high-alloy deposited metal sample in a mixed acid solvent comprising hydrochloric acid, nitric acid and hydrofluoric acid, digesting through utilizing a microwave digestion instrument to prepare a W, B and Nb simultaneously-dissolved solution to be tested, selecting the optical analytic spectral lines of all elements according to the matrix of the sample and the composition of coexistence elements, determining a spectral interference correcting method, preparing a group of standard solutions having concentrations from the low to the high through a coupling method of a matrix close to the sample matrix, introducing the standard solutions to ICP-AES (inductively coupled plasma-atomic emission spectrometer) under optimized apparatus working parameters, drawing a working curve according to the concentrations and the intensities of elements to be tested, introducing the sample solution to the ICP-AES, testing to obtain the intensities to be tested, and determining the contents of W, B and Nb in the sample solution according to the working curve. The method has the advantages of less reagent application amounts, reduction of the pollution of chemical reagents to the environment, and effective satisfying of the practical needs of the scientific research and the production.

Description

technical field [0001] The invention relates to a method for simultaneously measuring tungsten, boron and niobium in high-alloy surfacing metals, in particular to a method for measuring tungsten, boron and niobium in high-alloy surfacing metals using microwave digestion-inductively coupled plasma atomic emission spectrometry (ICP-AES) The method belongs to the field of metallurgical analytical chemistry. Background technique [0002] At present, some hard phase surfacing materials researched at home and abroad often have outstanding performance in terms of wear resistance, erosion resistance and thermal stability. However, during the welding process, the surfacing metal often has cracks and even the welding seam peels off in pieces. After a certain amount of W, Nb, B, Cr and other elements are added in proportion to the surfacing metal, it can effectively improve the intergranular segregation, refine the grains, and improve the crack resistance of the surfacing metal. W, Nb...

AI Technical Summary

Problems solved by technology

The above analysis methods involve a simple sample matrix, a narrow detection range, a large amount of reagents, or need sulfuric acid to fume or need to add tartaric acid, which is time-consuming and affects the determination of other elements boron and phosphorus

The technology of the present invention intends to provide a method for simultaneous determination of tungsten, boron and niobium in high-alloy surfacing metals, which mainly solves the problems that the current analysis of each element cannot be completed at one time, the operation process is long, and the measurement range is narrow, etc., and microwave digestion technology is coupled with inductance The combination of plasma atomic emission spectrometer reduces the consumption of reagents and reduces the pollution of chemical reagents to the environment, avoiding the volatilization of elemental boron in the form of boron fluoride, and the recovery rate of the method is high

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