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Method for preparing sample showing metallurgical structure of tantalum-tungsten alloy

A technology of metallographic structure and tantalum-tungsten alloy, which is applied in the field of preparing tantalum-tungsten alloy metallographic samples and displaying the structure, can solve the problems such as the difficulty of displaying the grain structure, and achieve the effect of simple implementation, solution to display difficulties, and easy preparation

Active Publication Date: 2010-06-16
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the difficult problems of tantalum-tungsten alloy metallographic sample preparation and grain structure display

Method used

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  • Method for preparing sample showing metallurgical structure of tantalum-tungsten alloy
  • Method for preparing sample showing metallurgical structure of tantalum-tungsten alloy
  • Method for preparing sample showing metallurgical structure of tantalum-tungsten alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Coarse grinding: The tantalum-tungsten alloy sample is polished by 200#, 400#, 600#, 800#, 1000#, 1500#, 2000# silicon carbide water sandpaper in sequence, and water is used as lubricant, which is changed every time during grinding For sandpaper, the sample should be rotated 90 degrees in the same direction, and the surface of the sample should be observed with a microscope to determine the state of the grinding surface;

[0027] 2. Cleaning: Hold the coarsely ground sample with tweezers, put it in the cleaning solution for cleaning, after cleaning for 30 seconds, put it in clean water to rinse;

[0028] 3. Fine grinding: Carry out fine grinding on diamond grinding paper with a particle size of 1 μm. First, grind away the rough grinding scratches along the direction perpendicular to the rough grinding scratches, then turn 90 degrees, and grind again. Observe the surface state and confirm that the surface scratches are in the same direction;

[0029] 4. Cleaning: Hol...

Embodiment 2

[0033] 1. Coarse grinding: The tantalum-tungsten alloy sample is polished by 200#, 400#, 600#, 800#, 1000#, 1500#, 2000# silicon carbide water sandpaper in sequence, and water is used as lubricant, which is changed every time during grinding For sandpaper, the sample should be rotated 90 degrees in the same direction, and the surface of the sample should be observed with a microscope to determine the state of the grinding surface;

[0034] 2. Cleaning: Hold the coarsely ground sample with tweezers, put it in the cleaning solution for cleaning, after cleaning for 45 seconds, put it in clean water to rinse;

[0035] 3. Fine grinding: Carry out fine grinding on diamond grinding paper with a particle size of 1 μm. First, grind away the rough grinding scratches along the direction perpendicular to the rough grinding scratches, then turn 90 degrees, and grind again. Observe the surface state and confirm that the surface scratches are in the same direction;

[0036] 4. Cleaning: Cla...

Embodiment 3

[0040] 1. Coarse grinding: The tantalum-tungsten alloy sample is polished by 200#, 400#, 600#, 800#, 1000#, 1500#, 2000# silicon carbide water sandpaper in sequence, and water is used as lubricant, which is changed every time during grinding For sandpaper, the sample should be rotated 90 degrees in the same direction, and the surface of the sample should be observed with a microscope to determine the state of the grinding surface;

[0041] 2. Cleaning: Hold the coarsely ground sample with tweezers, put it in the cleaning solution for cleaning, after cleaning for 60 seconds, put it in clean water to rinse;

[0042] 3. Fine grinding: Carry out fine grinding on diamond grinding paper with a particle size of 1 μm. First, grind away the rough grinding scratches along the direction perpendicular to the rough grinding scratches, then turn 90 degrees, and grind again. Observe the surface state and confirm that the surface scratches are in the same direction;

[0043] 4. Cleaning: Cla...

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Abstract

The invention discloses a method for preparing a sample showing a metallurgical structure of tantalum-tungsten alloy and belongs to the technical field of the preparation of metallographic samples. The method comprises the process steps of coarse grinding, washing, fine grinding, washing, polishing and etching, wherein in a formula of the cleaning liquid, a volume ratio of sulfuric acid to nitric acid to hydrofluoric acid to deionized water is 5:2:2:11; and in a formula of the etching liquid, a volume ratio of sulfuric acid to nitric acid to hydrofluoric acid to deionized water is 5:2:2:1. The method has simple process and easily prepares the metallurgical sample of the tantalum-tungsten alloy and obtains clear metallurgical photos of the tantalum-tungsten alloy.

Description

technical field [0001] The invention belongs to the technical field of metallographic sample preparation, in particular to a method for preparing a tantalum-tungsten alloy metallographic sample and displaying the structure. Background technique [0002] Tantalum-tungsten alloy has the advantages of high density, high temperature resistance, high strength, good processing performance, fracture toughness, corrosion resistance, etc. It is an indispensable and important material in the fields of aviation, aerospace, chemical industry, nuclear industry, high temperature technology, etc. application prospects. Tantalum-tungsten alloy is a binary infinite displacement solid solution with a body-centered cubic structure and a single-phase alloy without phase transition. Therefore, it mainly controls the grain size by cold plastic deformation and recrystallization annealing to improve material properties. Grain refinement can not only improve the strength of the material, but also i...

Claims

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Application Information

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IPC IPC(8): G01N1/32
Inventor 彭海健闫晓东李德富
Owner GRIMAT ENG INST CO LTD
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