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Analysis method for online determination on nitrogen in steel by direct-reading spectrometer

A technology of direct reading spectrometer and analysis method, which is applied in the field of iron and steel analysis, can solve problems such as long time, unfavorable timely adjustment of smelting production, and lack of timely guidance, and achieve the effect of saving analysis time

Inactive Publication Date: 2019-04-23
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The entire analysis process (excluding sampling and transmission) takes about 20 minutes. Compared with the production rhythm of steelmaking, the analysis process takes a long time, and the significance of timely guidance is not strong, which is not conducive to the timely adjustment of smelting production

Method used

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  • Analysis method for online determination on nitrogen in steel by direct-reading spectrometer
  • Analysis method for online determination on nitrogen in steel by direct-reading spectrometer

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Embodiment 1

[0032] This embodiment provides an analysis method for online measurement of nitrogen in steel by a direct reading spectrometer, which specifically includes the following steps:

[0033] (1) Determine the analysis conditions of the direct reading spectrometer

[0034] Purify argon (high-purity argon, liquid argon) twice, using domestic TKCA-12 argon purification device and imported argon purifier to improve the quality of argon. Nitrogen content in the gas ≤ 3ppm, oxygen < 1.5ppm, moisture < 2.5ppm;

[0035] Nitrogen analysis line is 149.26nm, tertiary spectrum line; internal standard iron spectrum line is 273.07nm;

[0036] The argon flushing time is 5s, the pre-integration time is 5s, and the integration time is 4s;

[0037] (2) Set the working conditions of the milling prototype

[0038] Adjust the spindle speed of the milling machine to 700-800 rpm, the working speed to 4.5-5.5 mm / s, and the milling thickness to 0.2-0.6 mm;

[0039] (3) Draw the working curve

[0040]...

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Abstract

The invention discloses an analysis method for online determination on nitrogen in steel by a direct-reading spectrometer. The method concretely comprises the following steps of (1) determining the analysis condition of the direct-reading spectrometer; (2) setting the work condition of a sample milling machine; (3) drawing a work curve; (4) performing sampling and testing. The method has the advantages that through once sampling and once sample preparation, the analysis on each element and the nitrogen element content can be completed; the simultaneous generation and simultaneous reporting ofdata are realized; the analysis speed is high; the operation method is simple; the analysis accuracy and precision are high; the analysis time is greatly shortened; the quality control in the online nitrogen control or nitrogen regulating process of high-quality steel types of iron and steel industry is improved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel analysis, and relates to an analysis method for iron and steel components, specifically a method for measuring nitrogen content in iron and steel (mainly aiming at a mass fraction of 0.0020%-0.0150%), specifically an online measurement method of a direct reading spectrometer Analytical method of nitrogen in steel. Background technique [0002] Nitrogen can strengthen the steel, but it will significantly reduce the plasticity, toughness, weldability and cold bending performance of the steel, and increase the aging tendency and cold brittleness. Generally, the nitrogen content in steel is required to be less than 0.008%. At present, my country's "Carbon Steel and Medium and Low Alloy Steel Spark Source Atomic Emission Spectroscopic Analysis Method (Conventional Method)", referred to as the direct reading spectrometer analysis method (GB / T4336-2016), has not formulated a national standard anal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/67G01N1/32
CPCG01N1/32G01N21/67
Inventor 黄伟潘宇洁
Owner NANJING IRON & STEEL CO LTD