Method for representing distribution of non-metallic inclusions in large-scale steel ingot by electrolytic method

A technology of non-metallic inclusions and inclusions, applied in the field of metal materials, can solve problems such as unsatisfactory, one-sided steel ingots, and needs to be improved, and achieve the effect of improving the quality of steel ingots

Inactive Publication Date: 2019-06-14
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this evaluation of steel ingots is one-sided and cannot meet the needs of understanding the overall inclusion distribution of large steel ingots in industrial production
Therefore, the existing methods for characterizing the distribution of inclusions in steel ingots still need to be improved

Method used

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  • Method for representing distribution of non-metallic inclusions in large-scale steel ingot by electrolytic method
  • Method for representing distribution of non-metallic inclusions in large-scale steel ingot by electrolytic method
  • Method for representing distribution of non-metallic inclusions in large-scale steel ingot by electrolytic method

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Embodiment 1

[0083] (1) Preparation for electrolysis

[0084] The steel ingot to be characterized is sectioned on a symmetrical plane, and on the obtained section according to Figure 4 Indicating sampling, the sample is required to be in the shape of a cuboid, with a thickness of 10mm and a length and width of 100mm. A total of 3 groups of samples are taken, which are marked as A, B, and C. Each group takes 6 samples, which are respectively recorded as A1~A6, B1~B6, C1~C6. Drill 3 M5 screw holes with a depth of 15mm at equal distances on one side of each sample to prepare bolts for hanging. The surface of the sample is required to be smooth, oil-free, and rust-free. The electrolyte solution is composed of tetramethylammonium chloride 2wt%, acetylacetone 8wt%, glycerin 5wt%, triethanolammonium 6wt%, and the rest is methanol with a purity of 99.9%.

[0085] (2) Electrolysis

[0086] Take the sample as the anode and the barbed wire as the cathode, adjust the electrolysis potential to 1.5-...

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Abstract

The invention discloses a method for representing the distribution of non-metallic inclusions in a steel ingot. The method for representing the distribution of non-metallic inclusions in the steel ingot comprises the following steps: cutting the steel ingot to be represented, forming a section on the steel ingot to be represented, and obtaining a thin plate sample from the section; taking the thinplate sample as an anode to perform an electrolytic treatment, and collecting an electrolyte; performing ultrasonic cleaning on the thin plate sample after the electrolytic treatment to obtain a cleaning solution, and d combining the cleaning solution with the electrolyte to obtain a mixed solution; filtering the mixed solution to obtain total inclusion particles; performing magnetic separation treatment on the total inclusion particles to obtain non-metallic inclusions; separating the non-metallic inclusions according to the particle size, and counting the number of the non-metallic inclusions of different particle sizes; and obtaining the distribution of the non-metallic inclusions in the steel ingot to be represented through mathematical model fitting according to the number of the non-metallic inclusions. According to the invention, through the method of mathematical fitting, the density size distribution of the whole steel ingot can be derived according to the particle size distribution characteristics of the local sample.

Description

technical field [0001] The invention relates to the field of metal materials, in particular, the invention relates to a method for characterizing the distribution of non-metallic inclusions in steel ingots by electrolysis. Background technique [0002] Large steel ingots are widely used and are the foundation of nuclear power, metallurgy, petrochemical, shipbuilding and other pillar industries that are related to the national economy and people's livelihood, and have a significant impact on national economic construction, national defense, and heavy industry development. In recent years, my country's industrialization has developed rapidly, and the major technical equipment used in the development of heavy industry has become increasingly large. The market's demand for large steel ingots with high quality and that can meet special requirements has become increasingly urgent. The inclusions in the steel ingot have a great influence on the quality of the steel ingot, not only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02G01N1/28G01N1/34G01N1/38
Inventor 谢梦叶沈厚发
Owner TSINGHUA UNIV
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