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Preparation method of high-strength high-toughness beta-type titanium alloy metallographic specimen

A high-strength, high-toughness, metallographic sample technology, applied in the preparation of test samples, etc., can solve problems affecting metallographic observation, unfavorable scientific research and analysis, and affecting observation effects, etc., to achieve good feasibility and promotion prospects. Clear and obvious effect

Inactive Publication Date: 2019-01-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

Due to the soft nature of titanium alloy, deformation twin stress layers are prone to appear on the surface to be observed during the grinding and polishing process, which affects the observation effect. In order to remove the stress layer, multiple corrosions are often required, and the operation is cumbersome
Due to its unique structure, the high-strength and high-toughness β-type titanium alloy is difficult to obtain a metallographic surface with clear grain boundaries, obvious contrast, and no stress layer on the surface when it is corroded by common etchant after repeated corrosion. Affect metallographic observation, scanning electron microscope observation and EBSD analysis, which is not conducive to scientific research personnel to carry out relevant scientific research analysis and research work

Method used

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  • Preparation method of high-strength high-toughness beta-type titanium alloy metallographic specimen

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preparation example Construction

[0044] The invention provides a method for preparing a metallographic sample of a high-strength and high-toughness beta-type titanium alloy, comprising the following steps: a. taking a high-strength and high-toughness beta-type titanium alloy, grinding and polishing; b. putting the polished sample into water , heated to 50°C-100°C, and kept warm for 3min-5min; c. corroding the sample obtained in step b with a metallographic etchant solution, to obtain.

[0045] The present invention adds the operation (being step b) that the metallographic sample is heated between grinding and polishing and corrosion steps, mainly can bring following benefit: 1, can effectively shorten the required corrosion time of follow-up corrosion step; 2, Reduce the concentration of hydrofluoric acid required in the corrosive solution, thereby improving the safety of the corrosion operation of high-strength and high-toughness β-type titanium alloys; 3. Promote the corrosive effect of the corrosive solutio...

Embodiment 1

[0049] Embodiment 1 adopts the method of the present invention to prepare the metallographic sample of high-strength and high-toughness β-type titanium alloy

[0050] 1. Cut the high-strength and high-toughness β-type titanium alloy into a size of 10×10×10mm by wire cutting 3 The number of samples is 4, and a hot-mounting machine is used for hot-mounting metallographic sample preparation.

[0051]2. The surface of the hot-mounted sample to be observed is ground to a plane by a metallographic pre-grinding machine, and ground and polished on an automatic grinding and polishing machine. Use 180# water sandpaper and 1200# water sandpaper in turn for rough grinding, and add water to cool during the grinding process. Use a 9μm polishing disc and a 3μm polishing disc in turn for fine grinding, and clean the sample, polishing disc and sample disc with clean water every time the polishing disc is replaced. During the rough grinding and fine grinding process, the automatic grinding an...

Embodiment 2

[0056] Embodiment 2 adopts the method of the present invention to prepare the metallographic sample of high-strength and high-toughness β-type titanium alloy

[0057] 1. Cut the high-strength and high-toughness β-type titanium alloy into a size of 10×10×10mm by wire cutting 3 The number of samples is 4, and a hot-mounting machine is used for hot-mounting metallographic sample preparation.

[0058] 2. The surface of the hot-mounted sample to be observed is ground to a plane by a metallographic pre-grinding machine, and ground and polished on an automatic grinding and polishing machine. Use 180# water sandpaper and 1200# water sandpaper in turn for rough grinding, and add water to cool during the grinding process. Use a 9μm polishing disc and a 3μm polishing disc in turn for fine grinding, and clean the sample, polishing disc and sample disc with clean water every time the polishing disc is replaced. During the rough grinding and fine grinding process, the automatic grinding a...

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Abstract

The invention relates to a preparation method of a high-strength and high-toughness beta-type titanium alloy metallographic specimen and belongs to the technical field of titanium alloy metallographicspecimen preparation. The invention provides a preparation method of a high-strength and high-toughness beta-type titanium alloy metallographic specimen, which comprises the following steps: a, taking a high-strength and high-toughness beta-type titanium alloy for grinding and polishing; b, placing the polished specimen into water, heating to 50-100 degrees centigrade, and insulating for 3-5 min;c, corroding the specimen obtained in the step b with metallographic corrosive liquid so as to obtain the high-strength and high-toughness beta-type titanium alloy metallographic specimen. The methodin the invention can effectively corrode the surface of the high-strength and high-toughness beta-type titanium alloy metallographic specimen, obtains the metallographic specimen with clear and obvious crystal boundary and without a deformation layer conveniently, provides a good test foundation for smooth progress of the tests such as metallographic observation and EBSD and has good feasibilityand promotion prospect.

Description

technical field [0001] The invention relates to a method for preparing a high-strength and high-toughness β-type titanium alloy metallographic sample, and belongs to the technical field of titanium alloy metallographic sample preparation. Background technique [0002] High-strength and high-toughness β-type titanium alloys generally refer to titanium alloys with a tensile strength above 1000 MPa and a structure mostly in the β-phase, which generally has good cold formability in a solid solution state. Typical high-strength and high-toughness β-type titanium alloys such as TB22 titanium alloys have the advantages of high strength, good ductility, and low hot forming temperature. They can be used to produce processed materials such as plates, strips, foils, wires, and rods, and can also be used to make golf balls. The hitting surface of the head, the speed change wheel of the bicycle, the high-end spectacle frame, etc. [0003] At present, when preparing titanium alloy metall...

Claims

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Application Information

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IPC IPC(8): G01N1/32
CPCG01N1/32
Inventor 吴静怡王莹
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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