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Preparation method of steel sample for determining component content in steel

An element and sample-taking technology, which is applied in the field of element sample preparation in steel, can solve the problems of not fully satisfying the quality control before the furnace and the long sample preparation time.

Inactive Publication Date: 2009-01-14
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sample preparation time of this method is as long as 16 minutes, which cannot fully meet the needs of quality control in front of the furnace.

Method used

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  • Preparation method of steel sample for determining component content in steel
  • Preparation method of steel sample for determining component content in steel
  • Preparation method of steel sample for determining component content in steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] What the present embodiment prepared was 0Cr18Ni9 (national standard 304) steel oxygen sample, and its steps are as follows:

[0035] I. Take sample from ladle

[0036] The frustum-shaped barrel-shaped analysis sampler 2 with a long handle 1 is used to take the steel sample from the ladle, and pour it out after cooling and solidification. The rod-shaped sample 9 obtained by the analysis sampler 2 is a frustum-shaped cone with a taper. The length is 40mm, the bottom diameter is Φ48mm, the top diameter is Φ38mm, the long handle 1 is 1.8m long, the diameter of the upper port 3 of the analytical sampler 2 is Φ55mm, the diameter of the lower bottom 4 is Φ35mm, and the height is 90mm, see figure 1 ;

[0037] II. Cutting the sample

[0038] The length is 26mm, the inner diameter of the upper opening 6 is 46mm, the inner diameter of the lower opening 7 is 32mm and the annular cutting fixture 5 with a 2mm push rod 8 in the middle of the ring is installed on the cutting equipme...

Embodiment 2

[0049] What present embodiment prepared was AISI304 (be American Standard 304) steel carbon sample, what used was drum shape analysis sampler 17 when ladle sampling, see Figure 7 The rod sample 19 that analysis sampler 17 obtains is cylindrical, sees Figure 8 , the length of the sample is 50mm, and the diameter is Φ36mm. When cutting the rod-shaped sample 19, use the annular cutting fixture 20. When processing the two surfaces of the thin-sheet sample, the roughness is R a 0.8, other steps and used equipment are identical with embodiment one. The measured carbon content ranged from 0.4 ppm to 6.0%.

Embodiment 3

[0051] What present embodiment prepares is SUS304 (this steel grade is Japanese standard 304) steel sulfur sample, what used during ladle sampling is drum shape analysis sampler 17, and the bar sample 19 that analysis sampler 17 obtains is cylindrical, The length of the sample is 48mm, and the diameter is Φ36mm. When cutting the rod-shaped sample 19, the rod-shaped sample 19 is directly clamped with a lathe and cut by a turning tool. Other steps and equipment used are the same as in the first embodiment. The sulfur content was measured to be 0-0.4%.

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Abstract

The invention relates to a method for preparing element sample of steel, which comprises: 1, sampling the ladle, while the sample is a rod whose taper degree is 0-0.4, and the rod sample can confirm the thicknesses of sample that cut with head and tail are both thicker than 10mm, then making the middle thickness higher than 6mm; 2, cutting sample, using clamper to clamp the rod sample, cutting sheet samples, whose thickness is not lower than 6mm; 3, processing two surfaces of sheet sample, and using surface processor to process two surfaces of sample sheet, while the processed surface roughness is not higher than Ra1.6; 4, punching sample, and arranging sheet sample into punch device to be punched into particle samples whose diameter is 3-10mm; 5, dipping and washing, arranging particle samples into ultrasonic dipper to be washed with acetone, and dried by hot air or natural wind. The inventive method is simple, accurate and quick, while it can be made into particle sample in four minutes.

Description

technical field [0001] A method for preparing element samples in steel. Background technique [0002] Rapid determination of carbon, sulfur, nitrogen in steel, especially oxygen content in steel is not only the basis for quality monitoring of deoxidation in steelmaking process and oxygen absorption degree of continuous casting and drawing steel, but also the key to reducing the content of inclusions in steel and improving the internal quality of steel One of the indicators. The traditional chemical method to determine the oxygen content is only suitable for the liquid steel sample of aluminum deoxidation, not for the analysis of the oxygen content of the solid metal. The sample preparation method is to process the sample into iron filings with a planer, drilling machine, etc. At present, most of the sample preparation methods for solid metal analysis of oxygen are to process the sample into granular or chip samples with hollow drilling machines, lathes and other equipment, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/06G01N1/30
Inventor 张存贵薄世明王鹏郝艳峰王惠苹李爱华王峰
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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