Metallographic preparation method of tungsten-zirconium alloy

Abstract

The invention discloses a metallographic preparation method of a tungsten-zirconium alloy. The metallographic preparation method is characterized by comprising the following steps of: 1) sampling, intercepting a small block sample, and enabling a cutting surface to be an inspection surface, 2) grinding, grinding the inspection surface with abrasive paper to remove surface scratches, and after grinding is finished, putting the sample into alcohol for ultrasonic cleaning, and then taking out and blow-drying the sample, (3) rough polishing, specifically, conducting rough polishing through a diamond spray polishing agent, and enabling the rotating speed to range from 300 r / min to 500 r / min, and after rough polishing is finished, putting the sample into alcohol, ultrasonically cleaning, takingout and blow-drying, (4) conducting fine polishin, specifically, conducting fine polishing through a chromium sesquioxide polishing agent, and enabling the rotating speed to range from 100 r / min to 150 r / min, and after the fine polishing is finished, putting the sample into alcohol, ultrasonically cleaning, taking out and blow-drying, and (5) final polishing, specifically, conducting final polishing through silicon latex suspension liquid, enabling the rotating speed to be 100-150 r / min, after final polishing is completed, putting the sample into alcohol to be subjected to ultrasonic cleaningand then taken out to be blow-dried to be observed. The metallographic preparation method has the advantages that the sample preparation time is shortened, and the microscopic structure is clear and visible.

Description

technical field [0001] The invention relates to a metallographic preparation method, in particular to a metallographic preparation method of a tungsten-zirconium alloy. Background technique [0002] Tungsten-zirconium alloy is a typical energetic structural material with high density and high strength. It is often used to make tungsten-zirconium alloy fragments and has broad application prospects in the military field. There are two preparation methods for tungsten-zirconium alloy: powder metallurgy and vacuum melting. [0003] The uniformity of the distribution of tungsten, zirconium main elements and other elements is the main factor affecting the performance of materials, so the observation of material microstructure is very important. Metallographic preparation is the basis of material microstructure observation, and it is also an important method to study material properties and detect defect failure. [0004] Due to its energy content, tungsten-zirconium alloys are r...

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Problems solved by technology

[0004] Due to its energy content, tungsten-zirconium alloys are relatively soft and tough. Conventional metallographic sample preparation cannot remove scratches and deformed layers in a short time. , releases a large amount of heat, and long-term grinding and polishing are prone to tissue artifacts. Therefore, the parameters of grinding and polishing are extremely demanding in the sample preparation process; and the traditional tungsten-zirconium alloy microstructure display usually uses hydrofluor Acid: nitric acid = 19:1 (volume ratio) to wipe the ground and polished samples. On the one hand, the high-concentration and highly corrosive acid has extremely high requirements on the operator, and it is easy to cause great harm to the operator; on the other hand, The currently used acid is difficult to display the microstructure, which requires a long polishing time and the microstructure is blurred, so the effect is not ideal

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