Unlock instant, AI-driven research and patent intelligence for your innovation.

Device and method for synchronously measuring resistance and potential difference change of magnetic metal melt

A metal melt, synchronous measurement technology, applied in the field of material science, can solve the problems of hysteresis, discontinuity and difference of processing effect, and achieve the effect of improving the efficiency of electromagnetic generation and increasing the density

Active Publication Date: 2014-11-26
NORTHEASTERN UNIV
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that there is hysteresis and discontinuity in the investigation of the treatment effect, that is, the test period is long, and it is impossible to conduct a full investigation of the treatment process
Although the resistance or thermoelectric potential of the metal melt is sensitive to the microstructure of the melt, the sensitivity to the change of the magnetic structure of different types of metal melts may be different. If the metal melt caused by the application of an electromagnetic field can be measured at the same time The resistance change and thermoelectric potential change of the magneto-induced metal melt can be easily selected to accurately detect the change of the melt structure. Method for measuring melt resistance change or thermoelectric potential change

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for synchronously measuring resistance and potential difference change of magnetic metal melt
  • Device and method for synchronously measuring resistance and potential difference change of magnetic metal melt
  • Device and method for synchronously measuring resistance and potential difference change of magnetic metal melt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] (1) The metal melt to be tested is a Sn-20wt.%Pb alloy melt, which is heated to 150°C above the liquidus temperature, and the inner electrode (10), outer electrode (11) and thermocouple (14) are fixed In the molten metal storage unit (5), pour the heated molten metal to be tested into the molten metal storage unit (5), and after the molten metal solidifies, move the molten metal storage unit (5) into the quartz tube (15), and plug rubber plugs (16) at both ends, then put the quartz tube (15) into the central constant temperature zone of the tubular resistance holding furnace (17) to move the metal melt heating and protection system (3) Place the center of the molten metal storage unit (5) at the center of the excitation coil water-cooling sleeve (25), and connect the detection circuit;

[0075] (2) Heat up the tube-type resistance holding furnace (17), heat the metal melt to be tested, feed Ar protective gas into the protective gas inlet (23) of the quartz tube (15), tu...

Embodiment 2

[0079] (1) The metal melt to be tested is an Al-2.89wt.%Fe alloy melt, which is heated to 250°C above the liquidus temperature, and the inner electrode (10), outer electrode (11) and thermocouple (14) Fix it in the molten metal storage unit (5), pour the heated molten metal to be tested into the molten metal storage unit (5), and move the molten metal storage unit (5) into the molten metal storage unit (5) after the molten metal solidifies In the quartz tube (15), and plug rubber plugs (16) at both ends, then put the quartz tube (15) into the central constant temperature zone of the tube-type resistance holding furnace (17), and move the metal melt to heat and protect system (3), so that the center of the molten metal storage unit (5) is placed at the center of the excitation coil water-cooling sleeve (25), and the detection circuit is connected;

[0080] (2) Heat up the tube-type resistance holding furnace, heat the metal melt to be tested, pass Ar protective gas into the inl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
magnetic flux densityaaaaaaaaaa
magnetic flux densityaaaaaaaaaa
magnetic flux densityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of material science, and particularly relates to a device and a method for synchronously measuring resistance and potential difference change of a magnetic metal melt. The device for synchronously measuring resistance and potential difference change of a magnetic metal melt is composed of an electromagnetic field applying system, a metal melt heating and protection system, a metal melt storage unit, a resistance measurement system, a temperature measurement system, and a data acquisition and processing system. During measurement, a to-be-detected metal melt is poured into the metal melt storage unit, a detection circuit is connected, the resistance and the potential difference of the metal melt are detected by a double-electrode method or a four-electrode method, an electromagnetic field is applied to the metal melt and is closed when the set time is up, and the resistance and the potential difference of the metal melt continue to be detected until the resistance returns to the numerical value before the electromagnetic field is applied. Real-time, synchronous, continuous and high-precision automatic acquisition and processing of resistance and potential difference data is realized, and the structural change of a melt can be detected accurately.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a device and a method for synchronously measuring changes in resistance and potential difference of a magnetically induced metal melt. Background technique [0002] Melt pretreatment before metal solidification can change the structure of metal melt and increase the solidification nucleation rate. Therefore, pretreatment of metal melt is a common method to achieve microstructure refinement of metal as cast. The most commonly used pretreatment method is to add a refiner or modifier to the metal melt to achieve heterogeneous nucleation, thereby increasing the nucleation rate; One of the mechanisms of refinement is to change the short-range ordered structure of the metal melt by changing the dynamic fluctuation equilibrium state of the melt structure to increase the nucleation rate, thereby achieving refinement. [0003] For the investigation of the refinement effect of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R19/10
Inventor 乐启炽张建锋王红玲刘轩张志强崔建忠
Owner NORTHEASTERN UNIV