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Preparation method for titanium alloy rocking-rolling piece metallographic specimen

A technology of metallographic samples and titanium alloys, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of inability to corrode grain boundaries, complicated sample preparation process, and long sample preparation cycle, so as to facilitate observation and observation. Accurate and short sample preparation cycle

Active Publication Date: 2019-03-15
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the characterization of the pendulum mill forging structure mainly relies on the scanning electron microscope characterization based on the backscattering diffraction technique, which is not only costly, the sample preparation process is complicated, and the sample preparation period is also long. , unable to corrode the grain boundaries that can be observed by metallographic microscope and other technical problems need to be solved urgently

Method used

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  • Preparation method for titanium alloy rocking-rolling piece metallographic specimen
  • Preparation method for titanium alloy rocking-rolling piece metallographic specimen
  • Preparation method for titanium alloy rocking-rolling piece metallographic specimen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take the TC4 titanium alloy 800 ℃ rotary rolling sample and place it on a wire cutting machine to cut it into a long sample with a width of 10~20mm, a thickness of 5~10mm, and a length of 20~70mm; first chamfer the sample, and then The sample is roughly ground, and the scratches are in the shape of a cross, which can effectively eliminate the previous scratches, and then the samples are ground with 280#, 400#, 600#, 800# silicon carbide dry and wet sandpaper It is made by cross-grinding by dry grinding method, and the previous ink mark must be completely covered during each grinding process; then use Wuxi brand green silicon carbide dry-wet sandpaper to fine-tune Grinding, cross-grinding by wet grinding method, the grinding process should ensure that the surface of the sample is uniform and smooth until it is bright, and then use flannelette polishing cloth and aluminum oxide nano-scale polishing powder, and the number of revolutions of the polishing machine is adjusted ...

Embodiment 2

[0029] Take the TC4 titanium alloy 900 ℃ rotary rolling sample and place it on a wire cutting machine to cut it into a long sample with a width of 10~20mm, a thickness of 5~10mm, and a length of 20~70mm; first chamfer the sample, and then The sample is roughly ground, and the scratches are in the shape of a cross, which can effectively eliminate the previous scratches, and then the samples are ground with 280#, 400#, 600#, 800# silicon carbide dry and wet sandpaper It is made by cross-grinding by dry grinding method, and the previous ink mark must be completely covered during each grinding process; then use Wuxi brand green silicon carbide dry-wet sandpaper to fine-tune Grinding, cross-grinding by wet grinding method, the grinding process should ensure that the surface of the sample is uniform and smooth until it is bright, and then use flannelette polishing cloth and alumina nano-scale polishing powder, and the number of polishing machine revolutions is adjusted at 800 rpm. M...

Embodiment 3

[0032] Take the TC4 titanium alloy 1000 ℃ rotary rolling sample and place it on a wire cutting machine to cut it into a long sample with a width of 10~20mm, a thickness of 5~10mm, and a length of 20~70mm; first chamfer the sample, and then The sample is roughly ground, and the scratches are in the shape of a cross, which can effectively eliminate the previous scratches, and then the samples are ground with 280#, 400#, 600#, 800# silicon carbide dry and wet sandpaper It is made by cross-grinding by dry grinding method, and the previous ink mark must be completely covered during each grinding process; then use Wuxi brand green silicon carbide dry-wet sandpaper to fine-tune Grinding, cross-grinding by wet grinding method, the grinding process should ensure that the surface of the sample is uniform and smooth until it is bright, and then use flannelette polishing cloth and aluminum oxide nano-scale polishing powder, and the number of polishing machine revolutions is adjusted at 900...

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Abstract

The invention discloses a preparation method for a titanium alloy rocking-rolling piece metallographic specimen. A titanium alloy TC4 rocking-rolling piece is taken as a raw material; the preparationmethod comprises the following steps of dividing, performing coarse grinding, performing fine grinding, performing electrolytic polishing, corroding by using a corrosive and the like in sequence. Thepreparation method for the titanium alloy rocking-rolling piece metallographic specimen disclosed by the invention can be applied to a product which deforms easily, is large in deformation amount, high in stress and irregular in appearance; after the specimen is corroded, the specimen is in a matte colour and bright colour; the corrosion uniformity is good; a corroding method has high selectivity;important metallographic information, such as grain morphology and grain structure type, can be obtained by observing the corroded metallographic structure through a metallographic microscope, so that the corroded metallographic structure is more beneficial to observation and is observed more accurately; the preparation method is low in cost, simple in specimen preparation process, short in specimen preparation period, and worthy of market promotion and application.

Description

technical field [0001] The invention relates to a method for preparing a metallographic sample, in particular to a method for preparing a metallographic sample of a TC4 titanium alloy pendulum mill. Background technique [0002] The pendulum rolling forging process can significantly improve the formability of titanium alloy TC4, and the obtained pendulum rolling forging has a strong base texture and strength perpendicular to the base plane. However, the observation of the structure of the pendulum mill sample is a difficult problem. The main reason is that the corrosion preparation of the metallographic sample is very difficult, and the corrosion control is not good. observe. [0003] Because the metallographic sample of swing mill forging TC4 is difficult to corrode, it is difficult to observe the microstructure with a metallographic microscope. At present, the characterization of the pendulum mill forged structure mainly relies on the SEM characterization based on the ba...

Claims

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Application Information

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IPC IPC(8): G01N23/2005G01N23/203
CPCG01N23/2005G01N23/203
Inventor 姜山邓莹伍太宾姜中涛陈巧旺刘兵张铁军王明光
Owner CHONGQING UNIV OF ARTS & SCI
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