An on-line detection device for the structure change of metal melt caused by ultrasonic pretreatment

A technology of ultrasonic pretreatment and metal melt, applied in the field of material science, can solve the problems of long test period, discontinuity, hysteresis of pretreatment effect, etc., to facilitate insertion and withdrawal, ensure temperature consistency, and improve repeatability Effect
CN104076065BActive Publication Date: 2016-08-17NORTHEASTERN UNIV LIAONING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEASTERN UNIV LIAONING
Publication Date
2016-08-17

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Abstract

The invention belongs to the field of materials science and technology, and specifically relates to an online detection device for structural changes in metal melt caused by ultrasonic pretreatment. The detection device of the present invention consists of a heating insulation system, a metal melt storage unit, a power ultrasonic system, a melt resistance or resistivity detection system, a melt temperature signal acquisition system, a data acquisition and processing system, and the like. The device of the present invention can detect and utilize the structurally sensitive physical parameter - the change amount Δr of the resistance parameter to characterize the structural change of the metal melt caused by ultrasound. It successfully solves the insulation problem of the power ultrasonic introduction rod and overcomes the problem of using voltammetry. The influence of the ultrasonic rod when measuring the resistance of ultrasonic-induced metal melt, and using advanced electronic measurement technology and computer technology to achieve real-time, synchronous, continuous and high-precision automatic collection and processing of resistance and temperature data, and using the two-electrode method and four-electrode method All methods can achieve accurate measurement.
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Description

technical field

[0001] The invention belongs to the technical field of material science, and in particular relates to an on-line detection device for the structure change of metal melt caused by ultrasonic pretreatment. Background technique

[0002] The key to controlling the solidification behavior is to control the nucleation process of the metal melt. All methods that can increase the nucleation rate can achieve the refinement of the solidification structure. Melt pretreatment can change the melt structure and increase the nucleation rate, so it is a common method to achieve as-cast microstructure refinement. External field pretreatment refinement of metal melt is a process method to promote homogeneous nucleation to achieve refinement. One of its mechanisms is to increase the nucleation rate by changing the dynamic fluctuation equilibrium state of the melt structure, that is, the application of an external field The short-range ordered structure of the metal melt is ch...

Claims

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