Preparation method of standard sample for spectrum analysis

Abstract

The invention provides a preparation method of a spectral analysis standard sample, and the preparation method comprises the steps of sieving the steel class, confirming the element and the initial value of the steel class, preparing the standard sample, testing the uniformity, analyzing the constant value and confirming the standard value, identifying, packaging and making certificate, scrutinizing the stability, and contrasting the standard steel. The invention has the advantages that the analyzing speed can be improved by using the standard steel, the duration of heat is saved, and the benefit is quite impressive. The problem of on-line analysis of the five harmful elements can be solved, and the smelting is monitored in real time, to stop the situation of scrap steel or steel class changing caused by the over limited five harmful elements happening. A piece of standard steel can control the major elements and the residual elements, monitor the five harmful elements and the acid-soluble aluminium in the liquid steel in real time, without the analyzing time increased. The method can be popularized, and the spectral analysis controlling standard steel is necessary for the prior steel-making corporation. By using continuous casting semi finished metal to develop the spectral analysis controlling standard steel, the process is simplified, and the developing cost is reduced.

Description

technical field [0001] The invention relates to a method for preparing a standard sample block for spectral analysis in steelmaking and tube rolling production testing. Background technique [0002] Photoelectric direct reading spectroscopic analysis occupies an important position in modern metallurgical analysis and testing technology. It is an accurate and fast chemical composition analysis method. Generally, it only takes 2-3 minutes to report the analysis results. However, it is a relative analysis method, and the standard steel with known composition content must be used as a reference in order to obtain fast and accurate analysis results. There are two types of standard steel for direct reading spectral analysis. One is standard steel for establishing instrument calibration curves (also known as working curves). Control standard steel for smelting or rolling process analysis. It is difficult to buy suitable control standard steel, because the control standard steel i...

AI Technical Summary

Problems solved by technology

Since these samples are not real control standard steels, there are many problems in actual use, mainly as follows: 1. When analyzing samples, it is necessary to analyze multiple control standard steels (generally 3-4 pieces) at the same time to control the main elements and its content (C / carbon, Si / silicon, Mn / manganese, P / phosphorus, S / sulfur, Ni / nickel, Cr / chromium, Mo / molybdenum, V / vanadium, Ti / titanium, Al / aluminum, etc.), Therefore, the analysis time is delayed (smelting analysis requires that each sample should not exceed 5 minutes); 2. The control standard steel lacks residual trace elements (Ca / calcium, B / boron, Nb / niobium, Cu copper, etc.), especially the five harmful elements (Pb / lead, Sn / tin, As / arsenic, Sb / antimony, Bi / bismuth); although the content of the five harmful elements is small, it is very harmful to the quality of steel, especially oil pipes, and must be monitored in real time during smelting

Due to the lack of control standard steel, on-line analysis cannot be done, resulting in multiple furnaces of scrap steel (150 tons per furnace) or changing steel types, resulting in huge losses

3. Due to the difference in metallurgical structure and the reliability of the fixed value level, the analysis error of the element content is large, and some affect the product quality; 4. The type and quantity of the control standard steel are not enough. With the continuous increase of product varieties, the output This contradiction is becoming more and more prominent

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