METHOD FOR NON-CONTACT MEASUREMENT OF METAL MELTS VISCOSITY AND DEVICE FOR ITS REALISATION Russian patent published in 2009 - IPC G01N11/16 

FIELD: physics, measurements.

SUBSTANCE: method for non-contact photometric measurement of metal melts viscosity based on attenuation of torsional oscillations. At first periodic reversible twisting of elastic thread is carried out with crucible suspended on it with metal melt. Reversible twisting of elastic thread is performed by means of control with the help of computer by commutation of electromagnet unit. Besides crucible is connected with elastic thread with the help of ceramic rod. At upper end of ceramic rod, magnetic element is rigidly fixed, being arranged in the form of disk, rod or cylinder. Source of electromagnet field together with magnetic element are composite parts of electromagnet unit. Mass of magnetic element is less or equal to mass of crucible with metal melt placed in it. After disconnection of electromagnet unit, parametres of trajectory of light beam reflected from mirror fixed on ceramic rod are measured, afterwards amplitude-time parametres of sample crucible torsional oscillations attenuation are calculated.

EFFECT: reduced time of experiments, lower waste of melt components and increased accuracy of metal melts viscosity measurements results.

3 cl, 4 dwg