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Austenitic stainless steel continuous cast billet oscillation mark zone solidification structure and dendrite structure corrosion liquid and corrosion method thereof

A technology of austenitic stainless steel and solidification structure, which is applied in the field of corrosive solution for solidification structure and dendrite structure in the vibration mark area of ​​austenitic stainless steel continuous casting slab, and can solve the problem that the solidification structure is easily corroded, the erosion effect is not good, and the reaction is strong. problem, to achieve good display effect, good erosion effect, and stable erosion effect

Inactive Publication Date: 2015-04-22
ZHENSHI GROUP EASTERN SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, the low-magnification corrosion solution of continuous casting slabs is generally used to conduct corrosion research on the solidification structure and dendrite structure in the vibration mark area. Chinese patent, but this corrosive solution reacts strongly, the solidified structure is easily corroded, it is not easy to control, and the erosion effect is not good

Method used

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  • Austenitic stainless steel continuous cast billet oscillation mark zone solidification structure and dendrite structure corrosion liquid and corrosion method thereof
  • Austenitic stainless steel continuous cast billet oscillation mark zone solidification structure and dendrite structure corrosion liquid and corrosion method thereof
  • Austenitic stainless steel continuous cast billet oscillation mark zone solidification structure and dendrite structure corrosion liquid and corrosion method thereof

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Effect test

Embodiment 1

[0027] 1. Formula of corrosion solution.

[0028] The corrosion solution is formed by mixing ferric chloride, hydrochloric acid, absolute ethanol and water. The water is deionized water. The mass percentages of each component are: ferric chloride 1.32%, hydrochloric acid 13.16%, absolute ethanol 32.89%, and It is water; the mass concentration of hydrochloric acid is 36% to 38%.

[0029] 2. Preparation of corrosion solution.

[0030] Prepare the corrosion solution in the following order: first measure 80 ml of water, then measure 2 g of ferric chloride, after the ferric chloride is completely dissolved in water, then measure 50 ml of absolute ethanol, and finally measure 20 ml of hydrochloric acid.

[0031] 3. Metallographic corrosion.

[0032] Step 1. The sample is cleaned of scale, coarsely ground, finely ground, polished, cleaned and dried according to conventional methods.

[0033] Step 2. Fully immerse the prepared sample in the prepared corrosive solution and corrode f...

Embodiment 5

[0063] 1. Formula of corrosion solution.

[0064] The corrosion solution is formed by mixing ferric chloride, hydrochloric acid, absolute ethanol and water. The water is deionized water. The mass percentages of each component are: ferric chloride 2.60%, hydrochloric acid 12.99%, absolute ethanol 32.47%, and the balance It is water; the mass concentration of hydrochloric acid is 36% to 38%.

[0065] 2. Preparation of corrosion solution.

[0066] Prepare the corrosion solution in the following order: first take 80 ml of water, then measure 4 g of ferric chloride, after the ferric chloride is completely dissolved in water, then measure 50 ml of absolute ethanol, and finally measure 20 ml of hydrochloric acid.

[0067] 3. Metallographic corrosion.

[0068] Step 1. The sample is cleaned of scale, coarsely ground, finely ground, polished, cleaned and dried according to conventional methods.

[0069] Step 2. Fully immerse the prepared sample in the prepared corrosive solution and ...

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Abstract

The invention provides an austenitic stainless steel continuous cast billet oscillation mark zone solidification structure and dendrite structure corrosion liquid with a good erosion effect, and a corrosion method thereof. The corrosion liquid is prepared by mixing 1.32-2.60mass% of iron chloride with 13.03-19.67mass% of hydrochloric acid, 30.49-32.89mass% of anhydrous ethanol, and the balance of water, wherein the mass concentration of hydrochloric acid is 36-38%. The corrosion method comprises the following steps: washing scales of a sample through a routine technology, carrying out coarse grinding, carrying out fine grinding, polishing, cleaning, and carrying out blow drying; fully immersing the prepared sample in the prepared corrosion liquid, continuously shaking in the corrosion process, and corroding for 1-2.5min until the oscillation mark zone of the sample is eroded to be silvery to obtain a corroded sample; and flushing the corroded sample below a tap, cleaning by using alcohol, and carrying out blow drying.

Description

technical field [0001] The invention relates to an corrosive liquid and an corrosive method for the solidification structure and dendrite structure in the vibration mark area of ​​the austenitic stainless steel continuous casting slab. Background technique [0002] Since its inception, austenitic stainless steel has been playing an important role in stainless steel due to its good comprehensive properties, and its production and usage account for about 70% of the total production and usage of stainless steel. Since austenitic stainless steel undergoes peritectic reaction during solidification, it not only produces large solidification shrinkage, but also peritectic phase transformation shrinkage, so it is a strong shrinkage steel, and it is easier to produce disordered vibration marks in the continuous casting process , Depression, cracks and segregation defects, so the billet surface needs to be ground before rolling, which increases the process and processing costs. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/28G01N1/32
Inventor 陈晨李杰王士瑞
Owner ZHENSHI GROUP EASTERN SPECIAL STEEL
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