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Dendritic crystal corrosion macroscopic examination reagent for solidification structures and defects of continuous cast blank and preparation method thereof

A technology of solidification structure and low-magnification inspection, which is applied in the field of continuous casting of iron and steel, and can solve the problems of unclear observation of solidification structure

Active Publication Date: 2011-09-07
苏州东大汉森冶金实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formula of the mixed acid reagent is 500ml of hydrochloric acid, 25ml of sulfuric acid, and 100 grams of copper sulfate. After the sample is polished, the erosion method is applied until the solidification structure is displayed. The defect can also be observed using the mixed acid reagent, but the solidification structure cannot be observed clearly

Method used

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  • Dendritic crystal corrosion macroscopic examination reagent for solidification structures and defects of continuous cast blank and preparation method thereof
  • Dendritic crystal corrosion macroscopic examination reagent for solidification structures and defects of continuous cast blank and preparation method thereof
  • Dendritic crystal corrosion macroscopic examination reagent for solidification structures and defects of continuous cast blank and preparation method thereof

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Effect test

Embodiment 1

[0014] The continuous casting slab solidification structure and defect dendrite corrosion low-magnification inspection reagent of this embodiment, its composition is by mass percentage: copper chloride (CuCl 2 ) 0.28%, magnesium chloride (MgCl 2 ) 0.17%, ferric chloride (FeCl 3 ) 1.60%, hydrochloric acid 1.30%, absolute ethanol 54.75%, and the balance is water. Wherein the mass concentration of hydrochloric acid is 37%.

[0015] The preparation method of the continuous casting slab solidification structure and defect dendrite corrosion low-magnification inspection reagent of this embodiment is: the raw material ratio is according to the mass percentage of the reagent composition, that is, copper chloride (CuCl 2 ) 0.28%, magnesium chloride (MgCl 2 ) 0.17%, ferric chloride (FeCl 3 ) 1.60%, hydrochloric acid 1.30%, absolute ethanol 54.75%, and the balance is water. Add water to the container, then add copper chloride, magnesium chloride, ferric chloride and hydrochloric aci...

Embodiment 2

[0019] The continuous casting slab solidification structure and defect dendrite corrosion low-magnification inspection reagent of this embodiment, its composition is by mass percentage: copper chloride (CuCl 2 ) 1.09%, magnesium chloride (MgCl 2 ) 0.27%, ferric chloride (FeCl 3 ) 0.56%, hydrochloric acid 1.28%, absolute ethanol 55.80%, and the balance is water. Wherein the mass concentration of hydrochloric acid is 38%.

[0020] The preparation method of the continuous casting slab solidification structure and defect dendrite corrosion low-magnification inspection reagent of this embodiment is: the raw material ratio is according to the mass percentage of the reagent composition, that is, copper chloride (CuCl 2 ) 1.09%, magnesium chloride (MgCl 2 ) 0.27%, ferric chloride (FeCl 3 ) 0.56%, hydrochloric acid 1.28%, absolute ethanol 55.80%, and the balance is water. Add water to the container, then add copper chloride, magnesium chloride, ferric chloride and hydrochloric aci...

Embodiment 3

[0024] The continuous casting slab solidification structure and defect dendrite corrosion low-magnification inspection reagent of this embodiment, its composition is by mass percentage: copper chloride (CuCl 2 ) 1.0%, magnesium chloride (MgCl 2 ) 0.20%, ferric chloride (FeCl 3 ) 1.30%, hydrochloric acid 1.29%, absolute ethanol 54.70%, and the balance is water. Wherein the mass concentration of hydrochloric acid is 36%.

[0025] The preparation method of the continuous casting slab solidification structure and defect dendrite corrosion low-magnification inspection reagent of this embodiment is: the raw material ratio is according to the mass percentage of the reagent composition, that is, copper chloride (CuCl 2 ) 1.0%, magnesium chloride (MgCl 2 ) 0.20%, ferric chloride (FeCl 3 ) 1.30%, hydrochloric acid 1.29%, absolute ethanol 54.70%, and the balance is water. Add water to the container, then add copper chloride, magnesium chloride, ferric chloride and hydrochloric acid;...

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Abstract

The invention discloses a dendritic crystal corrosion macroscopic examination reagent for solidification structures and defects of a continuous cast blank and a preparation method thereof. The reagent comprises the following components by mass percent: 0.28-1.09% of copper chloride, 0.17-0.27% of magnesium chloride, 0.56-1.60% of ferric chloride, 1.28-1.30% of hydrochloric acid with the mass concentration of 36-38%, 54.70-55.80% of absolute ethyl alcohol and the balance of water. The preparation method comprises the following steps: adding the water into a container, and then adding the copper chloride, magnesium chloride, ferric chloride and hydrochloric acid; and adding the absolute ethyl alcohol after all the added raw materials are fully dissolved, and evenly stirring. Compared with the prior art, the invention solves the problem that other corrosive reagents can not clearly display the dendritic crystal solidification structures of a continuous cast blank; and the reagent has the characteristic of original-size display without expansion or reduction for interior defects of a continuous cast blank when used for dendritic crystal corrosion macroscopic examination on the solidification structures and defects of the continuous cast blank.

Description

technical field [0001] The invention belongs to the technical field of continuous casting of iron and steel, and relates to low-magnification inspection technology of dendrite corrosion, in particular to a low-magnification inspection reagent for solidification structure and defect dendrite corrosion of continuous casting slabs and a preparation method thereof. Background technique [0002] At present, the commonly used continuous casting slab solidification structure and defective dendrite corrosion reagents are cupric chloride perammonium chloride solution and mixed acid reagents. The formula of cupric chloride ammonium perchloride solution is: 35 grams of cupric chloride, 53 grams of ammonium perchloride, 1000ml of water, the sample is corroded in cupric chloride perammonium chloride solution for 30 ~ 90 seconds, rinsed afterwards, and rinsed In the process, the copper on the grinding surface is wiped off. With copper chloride perammonium chloride solution, defects can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/28G01N1/32G01N21/88
Inventor 孙中强许庆太陶立群李吉东冯新
Owner 苏州东大汉森冶金实业有限公司
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