TA2 pure titanium color metallographic corrosion method convenient to identify

A color metallographic and pure titanium technology, applied in the preparation of test samples, instruments, measuring devices, etc., to achieve the effects of convenient operation, clear grain combination characteristics, and good metallographic display effect

Pending Publication Date: 2022-07-22
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the color metallographic etching method for TA2 pure titanium is still blank in the prior art

Method used

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  • TA2 pure titanium color metallographic corrosion method convenient to identify
  • TA2 pure titanium color metallographic corrosion method convenient to identify
  • TA2 pure titanium color metallographic corrosion method convenient to identify

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A convenient identification type color metallographic corrosion method for TA2 pure titanium, the present embodiment uses as-cast TA2 pure titanium as the metallographic sample, and specifically includes the following steps:

[0046] 1) Prepare a corrosive agent, measure 100ml of water and pour it into a plastic container, then measure 18g of ammonium bifluoride and pour it into the solution, stir well and use at room temperature;

[0047] 2) Take the TA2 pure titanium metallographic sample, and perform rough grinding, fine grinding, polishing, cleaning and drying on the surface in turn to obtain a clean, bright and scratch-free sample to be tested;

[0048] 3) Use plastic tweezers to hold the absorbent cotton, dip the corrosive agent prepared above, and wipe the surface of the sample. After 40 seconds, the surface of the sample is observed to be dark brown;

[0049] 4) Rinse the sample with running water, rinse the sample with absolute ethanol, dry it with a hair dryer...

Embodiment 2

[0052] In this example, TA2 pure titanium in rolling and annealing state is used as the metallographic sample, and the rest of the operation steps are the same as those in Example 1.

[0053] The photo of the metallographic structure of this embodiment is attached Figure 4 shown, attached by Figure 4 It can be seen that the metallographic structure of the rolled and annealed TA2 pure titanium can be observed with color metallographic characteristics under the optical metallographic microscope. The metallographic structure of the rolled and annealed TA2 pure titanium is equiaxed α phase, equiaxed The grains show different color contrast, the grain shape is clear and intuitive, the color contrast is good, the grain boundary is not corroded, and the corrosion effect is excellent.

Embodiment 3

[0055] A convenient identification type color metallographic corrosion method for TA2 pure titanium, the present embodiment uses as-cast TA2 pure titanium as the metallographic sample, and specifically includes the following steps:

[0056] 1) Prepare a corrosive agent, measure 100ml of water and pour it into a plastic container, then measure 22g of ammonium bifluoride and pour it into the solution, stir well and use at room temperature;

[0057] 2) Take the TA2 pure titanium metallographic sample, and perform rough grinding, fine grinding, polishing, cleaning and drying on the surface in turn to obtain a clean, bright and scratch-free sample to be tested;

[0058] 3) Use plastic tweezers to hold the absorbent cotton, dip the corrosive agent prepared above, and wipe the surface of the sample. After 30 seconds, the surface of the sample is observed to be dark brown;

[0059] 4) Rinse the sample with running water, rinse the sample with absolute ethanol, dry it with a hair dryer...

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Abstract

The invention relates to a convenient-to-identify color metallographic corrosion method for TA2 pure titanium, which comprises the following steps: aiming at the metal structure characteristics of the TA2 pure titanium, selecting an ultrahigh-concentration ammonium bifluoride solution with the mass concentration of about 15-18% as a corrosive agent, and carrying out corrosion treatment on the metal surface in a wiping manner. The method is easy to operate and high in success rate, and the metallographic structure of the TA2 pure titanium can be clearly and accurately presented in a color metallographic mode. The method has the advantages of simple operation, good color contrast, no over-corrosion of the grain boundary and clear, visual and vivid grain combination characteristics, and can better realize the purpose of detecting the TA2 pure titanium color metallographic phase, thereby improving the efficiency and accuracy of metallographic phase detection.

Description

technical field [0001] The invention relates to the technical field of metallographic inspection of metal materials, in particular to a convenient identification type color metallographic corrosion method for TA2 pure titanium. Background technique [0002] TA2 pure titanium is mainly divided into two types: as-cast and work-annealed. These two states correspond to the metallographic characteristics of the two morphologies, one is the as-cast zigzag α phase, and the other is rolling annealing. The equiaxed α phase of the state. [0003] To obtain the metallographic structure of TA2 pure titanium, it needs to be corroded accordingly. The commonly used metallographic etchant for titanium alloys in the prior art is an aqueous solution of hydrofluoric acid + nitric acid. This etchant is mainly used to corrode the grain boundaries of pure titanium, which corrodes the grain boundaries of titanium into grooves, thereby showing the morphology characteristics of the grains, so as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32G01N21/84
CPCG01N1/32G01N21/84
Inventor 郭海霞
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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