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Method for fast and effectively improving measurement accuracy of 12 elemental composition in stainless steel

A technology of element composition and stainless steel, applied in thermal excitation analysis, material excitation analysis, etc., to achieve the effect of ensuring stability and reliability, high precision, and wide linear range

Inactive Publication Date: 2009-05-13
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Although the currently outsourced plasma emission spectrometer can simultaneously measure the composition of twelve elements in stainless steel, not each of the twelve elements measured can reach a certain measurement precision, the reason is the optimal working conditions and analysis of each element. The lines are different. It is the key and difficult point to make each element composition measured reach a high precision.

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  • Method for fast and effectively improving measurement accuracy of 12 elemental composition in stainless steel

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Experimental program
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Embodiment Construction

[0027] Step 1. Prepare instruments and equipment

[0028] 1.1 Model 725 Inductively Coupled Full Spectrum Direct Reading Plasma Emission Spectrometer (Varian, USA);

[0029] 1.2 EAT-20T analytical experimental ultrapure water device;

[0030] 1.3 Mettler-Toledo Al204 electronic balance;

[0031] 1.4 LabTech H150 water circulation cooler;

[0032] 1.5 DJW-10KVA automatic AC regulated power supply.

[0033] Connect the plasma gas to the plasma emission spectrometer through the pipeline, access the auxiliary gas through the pipeline in the middle layer of the plasma torch of the plasma emission spectrometer, install the atomizer in the plasma emission spectrometer, and connect the water circulation cooler to the plasma emission spectrometer:

[0034] Step 2. Determine the working parameters of the instrument

[0035] RF generator power: 1.15 kW; plasma gas flow: 15.0 liters / min; auxiliary gas flow: 1.50 liters / min; atomizing gas pressure: 200 kPa; one reading time: 5 seconds;...

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Abstract

The invention relates to a method for fast and effectively improving the component measurement precision of twelve elements in stainless steel. The method is characterized in that plasma gas is connected with a plasma emission spectrometer by a pipeline; auxiliary gas is accessed into a middle layer of a plasma torch tube of the plasma emission spectrometer; an atomizer is arranged in the plasma emission spectrometer; the working parameters of the plasma emission spectrometer such as inductance coupling whole spectrum direct reading and the like are confirmed; the analysis line of each element is confirmed; 5 to 10 standard steel samples or mixed standard working solution similar as an analysis sample are selected as a standard working curve; the sample is put into an Erlenmeyer flask and is put into the plasma emission spectrometer after nitric acid and hydrochloric acid are added, and then is connected with the atomizer; liquid sample is transformed into mist state to be sprayed into an atomizer chamber and reach a plasma torch; and the contents of elements manganese, silicon, phosphor, chrome, nickel, molybdenum, copper, cobalt, columbium, vanadium, aluminium and titanium in the sample are mensurated at the same time. The invention has the advantage that all components of every measured element reach high precision.

Description

technical field [0001] The present invention relates to a method for quickly and effectively improving the measurement precision of twelve elements in stainless steel, in particular to a method for quickly and efficiently using inductively coupled plasma emission spectrum analysis technology for stainless steel materials used in power generation equipment products in the power station industry. The invention provides a method for effectively improving the measurement precision of twelve elements, belonging to the technical field of chemical composition analysis of metal materials. Background technique [0002] Due to the rapid development of the industry, continuous improvement of technology and environmental protection requirements, higher requirements are put forward for the composition analysis of stainless steel materials, that is, more elements to be measured, a wide range of measurements, high precision requirements, and less consumption and emission of harmful substanc...

Claims

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Application Information

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IPC IPC(8): G01N21/73
Inventor 王建林李健陈娟华
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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