Method and device for testing function of refining of fusion metal grains through ultrasonic waves

Abstract

The invention mainly discloses a method and device for testing the function of refining of fusion metal grains through ultrasonic waves. A single-chip microcomputer, an ultrasonic pulse generation receiver, ultrasonic probes and a heating device are included. The single-chip microcomputer and the ultrasonic pulse generation receiver are connected through a wire. The ultrasonic pulse generation receiver is connected with the ultrasonic probes through a multi-direction connector. An alloy is placed on the heating device, the single-chip microcomputer receives upper computer instructions, and signals are transmitted to the ultrasonic pulse generation receiver through the single-chip microcomputer. The ultrasonic pulse generation receiver generates negative-high-voltage pulse signals to drivethe multiple ultrasonic probes to send ultrasonic waves, and the ultrasonic waves refine the alloy liquefied after heating. After the ultrasonic probes stop working and the alloy is cooled and solidified, and the alloy refined through the ultrasonic waves is cut to be observed. The single-chip microcomputer is utilized for control, the multiple ultrasonic probes are controlled, and under the sameoutside conditions, the fusion metal grain refining functions are compared under different ultrasonic frequencies and ultrasonic action time periods.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic cavitation, and in particular relates to a method and a device for testing the refinement effect of ultrasonic waves on molten metal grains. Background technique [0002] Molten metals will produce different crystal structures during solidification, such as columnar crystals and equiaxed crystals. Due to the different crystal structures, the anisotropy is large, and when processed, it will lead to uneven deformation and shorten the service life of the material. Short results in waste. Ultrasound has a refining effect on the crystal grains produced in the solidification process of molten metal. Due to the cavitation phenomenon, it promotes nucleation in liquid metal, and inhibits the formation of columnar crystals, which is the theory of nucleation promotion. The current experiment is to do an ultrasonic wave in one experiment. The role of parameters on grain refinement, but because the molten ...

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Problems solved by technology

[0002] Molten metals will produce different crystal structures during solidification, such as columnar crystals and equiaxed crystals. Due to the different crystal structures, the anisotropy is large, and when processed, it will lead to uneven deformation and shorten the service life of the material. short waste

Ultrasound has a refining effect on the crystal grains produced in the solidification process of molten metal. Due to the cavitation phenomenon, it promotes nucleation in liquid metal, and inhibits the formation of columnar crystals, which is the theory of nucleation promotion. The current experiment is to do an ultrasonic wave in one experiment. The role of parameters on grain refinement, but because the molten metal is affected by the external temperature during the solidification process, there are other factors that will affect the grain refinement, which will lead to a large error in the experimental results, so it is not enough to explain the impact of ultrasonic waves on crystal grains. The role of grain refinement

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