Original crystalline grain displaying agent of high-alloy and low-carbon martensite steel and displaying method

A technology of martensitic steel and display agent, which is applied in particle size analysis, particle and sedimentation analysis, measuring devices, etc., can solve the problems of difficult corrosion, few documents, and inapplicability of high-alloy low-carbon martensitic steel, etc., and achieve operational Simple, novel idea, complete grain boundary display effect
CN103018141AActive Publication Date: 2013-04-03安徽华驰动能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
安徽华驰动能科技有限公司
Publication Date
2013-04-03

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Abstract

The invention relates to an original crystalline grain displaying agent of high-alloy and low-carbon martensite steel and a displaying method. The displaying agent is formed by the following components according to solvent volume (ml) and mass (g): 5-10 ml of concentrated nitric acid, 10-30 ml of concentrated hydrochloric acid, 50-100 ml of alcohol, 0.5-4 g of picric acid and 1.0-6.0 g of sodium dodecyl benzene sulfonate. The displaying method is carried out by the steps of preparing a test sample, configuring the displaying agent, corroding the test sample, organizing and observing, and collecting an image. The original crystalline grain displaying agent of high-alloy and low-carbon martensite steel and the displaying method have the advantages of novel concept, simplicity in operation, complete crystal boundary display effect, capability of clearly recognizing a grain size, and convenience for accurately measuring the original grain size and grain fineness number, and provide good conditions for formulating and optimizing a steel product production process.
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Description

technical field

[0001] The invention belongs to the technical field of reagents for metallographic structure inspection of iron and steel materials, and in particular relates to a reagent and method for microstructure detection of high-alloy low-carbon steel martensitic steel. Background technique

[0002] High-alloy low-carbon martensitic steel is widely used in industry, especially large-scale castings and forgings in the heavy machinery industry, such as rotors of steam turbines, runners and blades of water turbines, etc. The original grain of martensitic steel is one of the important indicators to evaluate and test the performance of martensitic steel. For high-alloy martensitic steel, it contains a large amount of alloying elements, such as chromium, nickel, manganese, etc., which make it relatively corrosion-resistant. Generally, strong acid solutions are commonly used for the corrosion of its structure. However, it is difficult to corrode the grain boundaries of prio...

Claims

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