Chemical erosion agent for displaying macrostructure of expansion alloy, and erosion method thereof

A chemical etchant and expansion alloy technology, applied in the preparation of test samples, etc., can solve the problems of the difficulty of macroscopic low-magnification structure of expansion alloys, and achieve the effect of optimizing continuous casting technology, improving solidification structure, and being easy to control.
CN105486567AInactive Publication Date: 2016-04-13TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TAIYUAN UNIV OF TECH
Publication Date
2016-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a chemical erosion agent for displaying the macrostructure of expansion alloy, and an erosion method thereof, and belongs to the technical field of metallographic examination analysis. The chemical erosion agent comprises 3-4g of picric acid, 90-100ml of anhydrous alcohol, 2-3ml of hydrochloric acid and 2g of sodium dodecylbenzene sulfonate. The erosion method of the erosion agent comprises the following steps: heating the prepared erosion agent to a boiling state, allowing the polished surface of a ground sample to be downward, and suspending the ground sample in the boiling erosion liquid for 3-5min; and cleaning the eroded surface with alcohol after the erosion, and flushing the cleaned sample with clear water. The chemical erosion agent has the characteristics of simple operation process, good erosion effect, and easy control of the erosion time, and can be used to rapidly and accurately observe the microstructure of the expansion in order to provide technical bases for optimizing a continuous casting technology and improve the solidification structure of a continuous cast blank.
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Description

technical field

[0001] The invention belongs to the technical field of metallographic inspection and analysis, and in particular relates to a chemical etchant for displaying the macroscopic low-magnification structure of an expanded alloy and an erosion method thereof. Background technique

[0002] The expansion alloy is a single-phase austenite structure, and there is no phase transformation during the solidification process, resulting in a coarse solidification structure of the alloy continuous casting slab, almost all of which are coarse columnar grains, which seriously deteriorates the thermoplasticity of the alloy, causing the continuous casting slab to The cracking phenomenon is serious during the rolling process. Refining the solidification structure of the slab, inhibiting the growth of columnar grains in the slab and increasing the ratio of equiaxed grains in the center of the slab is an effective method to improve the thermoplasticity of the alloy. In order to imp...

Claims

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