Preparation method of V-based alloy metallographic sample

A technology for metallographic samples and base alloys, which is applied in the field of preparation of V-based alloy metallographic samples, can solve problems such as insufficient surface finish of samples, reduce operational difficulty and uncertainty, and achieve high metallographic appearance Effect

Inactive Publication Date: 2014-06-25
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a V-based alloy metallographic preparation method, which avoids the problem that the second phase falls off and produces scratches during mechanical polishing, which leads to insufficient surface finish of the sample and thus affects the observation of the metallographic morphology of the sample and the study of the microstructure.

Method used

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  • Preparation method of V-based alloy metallographic sample
  • Preparation method of V-based alloy metallographic sample
  • Preparation method of V-based alloy metallographic sample

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) The V-5Cr-5Ti alloy 10 × 10 × 10mm block sample was pretreated by rough grinding with coarse sandpaper, and then water-grinded step by step with water sandpaper until it was ground to 2000# water sandpaper.

[0032] (2) Electrolytic polishing solution preparation: Anhydrous glacial acetic acid and perchloric acid are used to prepare electrolytic polishing solution. The volume ratio of anhydrous glacial acetic acid and perchloric acid is 95:5, and anhydrous glacial acetic acid and perchloric acid are required to be of industrial purity. The polishing solution is a new solution.

[0033] (3) Electropolishing equipment and parameters: 0~100V DC regulated power supply, stainless steel cathode, liquid nitrogen cooling container. The polishing voltage is 70V, the current is 3.8A, and the polishing time is 20s.

[0034] (4) Before electrolytic corrosion, ultrasonically clean the polished sample. The cleaning solution is industrial alcohol to remove the covering produced o...

Embodiment 2

[0041] (1) The V-4Cr-4Ti alloy 10 × 10 × 10mm block sample was subjected to rough grinding pretreatment with coarse sandpaper, and then water grinding was carried out step by step with water sandpaper until it was ground to 2000# water sandpaper.

[0042] (2) Preparation of electrolytic polishing solution: Anhydrous glacial acetic acid and perchloric acid are used to prepare electrolytic polishing solution. The volume ratio of anhydrous glacial acetic acid and perchloric acid is 92:8. Anhydrous glacial acetic acid and perchloric acid are required to be of industrial purity. The polishing solution is a new solution.

[0043] (3) Electropolishing equipment and parameters: 0~100V DC regulated power supply, stainless steel cathode, liquid nitrogen cooling container. The polishing voltage is 90V, the current is 4.3A, and the polishing time is 15s.

[0044] (4) Before electrolytic corrosion, ultrasonically clean the polished sample. The cleaning solution is industrial alcohol to re...

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Abstract

The invention provides a preparation method of a V-based alloy metallographic sample, and belongs to the fields of heterogeneous alloy metallographic phase preparation. The method includes: subjecting a block V-based alloy sample to coarse grinding pretreatment, grinding with water step by step, preparing an electrolytic polishing solution, subjecting the sample to electrolytic polishing, subjecting the polished sample to cleaning under ultrasonic wave, wiping with alcohol, blowing the sample to dry the sample, preparing an electrolytic corrosion solution, subjecting the sample to electrolytic corrosion, washing the sample, wiping the sample with alcohol, blowing the sample to dry the sample, and performing metallographic observation. By adjusting experiment parameters and controlling the preparation steps of the V-based alloy metallographic sample, different metallographic phase shapes of the V-based alloy can be obtained, thus meeting observation requirements of different metallographic phases, reflecting comprehensive V-based alloy microstructure and providing experiment support for research of the V-based alloy.

Description

technical field [0001] The invention relates to a method for preparing a metallographic sample of a V-based alloy. The metallographic sample of the V-based alloy is prepared by performing electrolytic polishing and electrolytic corrosion on the V-based alloy, and belongs to the field of metallographic preparation of multi-phase alloys. Background technique [0002] Driven by the International Thermonuclear Experimental Reactor (ITER), the research on nuclear fusion reactor technology has made great progress. Among a series of candidate structural materials such as austenitic steel, ferritic / martensitic steel, SiC, and V-Cr-Ti alloy, V-(4~5)Cr-(4~5)Ti alloy has its unique The advantages of these materials have become the most promising candidate structural materials for fusion reactor core components. In recent years, the research on V-Cr-Ti alloys has also achieved remarkable results. The research results mainly focus on the preparation and performance of the alloys. With t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32
Inventor 胡晓康李增德崔舜
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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