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Preparation method of sample for testing metallographic structure of vanadium-based alloys

A metallographic structure and sample preparation technology, which is applied in the field of sample preparation for vanadium-based alloy metallographic structure inspection, can solve the problem of affecting the display effect of vanadium-based alloy sample inspection and analysis, affecting the effect of grinding and polishing treatment, and affecting The quality of sample preparation of vanadium-based alloys can solve the problems of easy slag falling and sand embedding, good display effect, reliability and accuracy

Active Publication Date: 2019-03-12
SICHUAN ENG TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the relatively soft and tough texture of vanadium-based alloys, if the metallographic sample preparation process measures are carried out in accordance with the metallographic sample preparation process of ordinary steel, the vanadium-based alloy sample will be embedded with sand grains at the initial stage of polishing treatment, and a large area will be formed. This will affect the effect of subsequent grinding and polishing treatment, which in turn will affect the quality of sample preparation of vanadium-based alloys, that is, the effect of inspection and analysis of vanadium-based alloy samples.

Method used

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  • Preparation method of sample for testing metallographic structure of vanadium-based alloys
  • Preparation method of sample for testing metallographic structure of vanadium-based alloys
  • Preparation method of sample for testing metallographic structure of vanadium-based alloys

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Embodiment 1

[0045] The present invention carries out sample preparation on the basis of the metallographic examination and analysis of VCr2 alloy, and the present invention comprises following process step:

[0046] Step 1. Cut and sample the VCr2 alloy material by wire electric discharge cutting, and the sample size is about 20mm×15mm;

[0047] Step 2. Thermally mount the sample on the resin matrix, and the cured hardness of the resin matrix after thermal mounting is required to be kept at about 48HRC;

[0048] Step 3. Polish the sample on the resin matrix according to the following procedure:

[0049] ①. Use 120# water sandpaper to grind the sample in a single direction, lubricate with water during the grinding process, and the grinding depth is about 0.5mm;

[0050] ②. Rotate and adjust the sample by about 90° relative to the polishing direction of process ①, and use 400# metallographic sandpaper to grind the sample in a single direction, and the thickness of the grinding removal is a...

Embodiment 2

[0064] The present invention carries out sample preparation on the basis of the metallographic structure inspection analysis of VCrTi1 alloy, and the present invention comprises following processing steps:

[0065] Step 1. Cut and sample the VCrTi1 alloy material by wire electric discharge cutting, and the sample size is about 20mm×15mm;

[0066] Step 2. Thermally mount the sample on the resin matrix, and the cured hardness of the resin matrix after thermal mounting is required to be maintained at about 50HRC;

[0067] Step 3. Polish the sample on the resin matrix according to the following procedure:

[0068] ①. Use 120# water sandpaper to grind the sample in one direction, lubricate with water during the grinding process, and the grinding depth is about 0.4mm;

[0069] ②. Rotate and adjust the sample by about 80° relative to the polishing direction of process ①, and use 400# metallographic sandpaper to grind the sample in a single direction, and the thickness of the grindin...

Embodiment 3

[0083] The present invention carries out sample preparation on the basis of the metallographic structure inspection analysis of VCrTi4 alloy, and the present invention comprises following process steps:

[0084] Step 1. Cut and sample the VCrTi4 alloy material by wire electric discharge cutting, and the sample size is about 20mm×15mm;

[0085] Step 2. Thermally mount the sample on the resin matrix, and the cured hardness of the resin matrix after thermal mounting is required to be maintained at about 52HRC;

[0086] Step 3. Polish the sample on the resin matrix according to the following procedure:

[0087] ①. Use 120# water sandpaper to grind the sample in a single direction, lubricate with water during the grinding process, and the grinding depth is about 0.3mm;

[0088] ②. Rotate and adjust the sample by about 45° relative to the polishing direction of process ①, and use 400# metallographic sandpaper to grind the sample in a single direction, and the thickness of the grind...

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Abstract

The invention discloses a preparation method of a sample for testing metallographic structure of vanadium-based alloys. The preparation method includes the steps of 1, collecting a sample from vanadium-based alloy material; 2, inlaying the sample into a resin base; 3, using various different abrasive papers to grind the sample on the resin base according to a set sequence; 4, using a lubricant topolish the ground sample in a set sequence through various different polishing agents; 5, eroding the polished sample in a corrosive agent for 10-70 s, using saturated borax solution to neutralize thecorrosive agent, taking out the sample, washing with clear water, washing with absolute ethyl alcohol, and blow-drying the washed sample to obtain the metallographic sample for testing and analysis of metallographic structure. The technical problem is effectively solved that falling chips and embedded sand easily occur during sample preparation with vanadium-based alloys; sample quality is improved reliably and feasibly; the sample has good displaying effect during subsequent testing and analysis.

Description

technical field [0001] The invention relates to metallographic structure inspection technology, in particular to a sample preparation method for vanadium-based alloy metallographic structure inspection. Background technique [0002] Vanadium-based alloys have excellent stability against neutron irradiation, low activation characteristics, resistance to hydrogen embrittlement, low thermal expansion, liquid metal corrosion resistance, high heat transfer rate, etc., and are internationally recognized as ideal fusion reactors Structural materials have broad application prospects in the nuclear industry, aerospace, and high-temperature fields. [0003] In order to clearly understand the quantitative relationship between the microstructure of metal materials and various properties, it is necessary to conduct inspection and analysis of the metallographic structure of the metal material. The inspection and analysis of the metallographic structure is realized on the basis of sample p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/32
CPCG01N1/286G01N1/32
Inventor 吴代建李艳丽赵怀昊单丽梅方琴傅骏彭显平张光明蔺虹宾
Owner SICHUAN ENG TECHN COLLEGE
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