System and method for measuring surface tension of metal melt under electromagnetic suspension condition

A metal melt and surface tension technology, applied in the field of material thermophysical properties research, can solve the problems of weak signal, complicated processing process, inconvenient use, etc., and achieve the effect of improving measurement accuracy, high sensitivity, and convenient measurement position

Active Publication Date: 2021-11-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a metal melt surface tension measurement system and method under the condition of electromagnetic levitation, aiming to solve the problems of weak signal, inconvenient use and complicated processing process in the prior art. Changes in luminous intensity, accurate acquisition of its surface tension value

Method used

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  • System and method for measuring surface tension of metal melt under electromagnetic suspension condition
  • System and method for measuring surface tension of metal melt under electromagnetic suspension condition
  • System and method for measuring surface tension of metal melt under electromagnetic suspension condition

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Embodiment 1

[0048] Such as Figure 1-Figure 3 As shown: this embodiment provides a metal melt surface tension measurement system 100 under the condition of electromagnetic levitation, including a photodetector 2, a filter structure 3, a data acquisition card 4 and a computer signal processing system 5, which are electrically connected in sequence, and a photoelectric The detector 2 is used to collect the light intensity signal of the metal sample 6 in the suspension induction heating device 1. Specifically, the photodetector 2 includes a photoelectric sensor 23, and the photodetector 2 also includes a laser sight 21 or a lens. The photosensitive surface is opposite to the laser sight 21 or the lens. The laser sight 21 is used to aim at the metal sample 6. The lens can maximize the focus of the light emitted by the metal sample 6 onto the photosensitive surface of the photoelectric sensor 23. The photoelectric sensor 23 is used for The collected light intensity signal of the metal sample 6...

Embodiment 2

[0067] This embodiment provides a metal melt surface tension measurement method using the metal melt surface tension measurement system 100 under the electromagnetic levitation condition of Embodiment 1, including the following steps:

[0068] Step 1: Prepare the metal sample 6, the mass of the metal sample 6 is 0.5-5g, use an electric arc furnace or other equipment to melt the metal sample 6 into a nearly spherical shape; put the metal sample 6 into the suspension induction heating device 1, and then conduct the suspension induction heating The heating device 1 is evacuated to 10-3 ~ 10-5Pa, then filled with inert gas, and the gas is repeated 2 to 6 times to provide the atmosphere required for the experiment to the suspension induction heating device 1;

[0069] Step 2: erect and adjust the photodetector 2;

[0070] In step 2, align the photodetector 2 with the window of the suspension induction heating device 1 by using an optical rod, and the distance from the metal sample ...

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Abstract

The invention discloses a system and a method for measuring the surface tension of a metal melt under an electromagnetic suspension condition, and relates to the technical field of material thermophysical property research, and the system comprises a photoelectric detector, a filter mechanism, a data acquisition card and a computer signal processing system which are electrically connected in sequence, the photoelectric detector is used for collecting a light intensity signal of a metal sample in the suspension induction heating device, the photoelectric detector converts the light intensity signal into a voltage signal, the voltage signal is processed by the filter structure to obtain an analog signal, and the analog signal is transmitted to the computer signal processing system through the data acquisition card to be processed and calculated, and finally the oscillation frequency of the surface of the metal melt is outputted. The problems of weak signals, inconvenience in use, complex treatment process and the like in the prior art are solved, and the surface tension value of the metal melt is accurately obtained by measuring the change of the luminous intensity during surface oscillation of the metal melt.

Description

technical field [0001] The invention relates to the technical field of research on thermophysical properties of materials, in particular to a system and method for measuring the surface tension of a metal melt under the condition of electromagnetic levitation. Background technique [0002] Surface tension is an important parameter of metal melt and an essential thermophysical property in the study of liquid metal microstructure and solidification process. At present, the methods for measuring the surface tension of metal melts include the maximum pressure bubble method, the capillary rise method and the pendant drop method. For the supercooled metal melt, because it is in a thermodynamically metastable state, any contact measurement method will cause it to solidify, so the above method cannot be applied. [0003] Under the condition of electromagnetic levitation, the shape of metal melt will change periodically under the action of high-frequency electromagnetic field. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/02H05B6/10
CPCG01N13/02H05B6/10G01N2013/0225
Inventor 阮莹刘克伦常健胡亮魏炳波
Owner NORTHWESTERN POLYTECHNICAL UNIV
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