Measuring and testing – Vibration – By mechanical waves
Patent
1989-08-10
1991-01-01
Chapman, John
Measuring and testing
Vibration
By mechanical waves
73 61R, G01N 2400
Patent
active
049810456
ABSTRACT:
A probe for ultrasound testing or treatment of a molten metal is provided. The probe includes an ultrasound transmitting rod having a downstream end adapted to contact molten metal under test or treatment. A piezoelectric crystal is provided on the probe and is adapted to supply ultrasound to or receive ultrasound from the rod. A rod cooling station is located near the downstream end of the rod and is operable to create in the rod, a steep temperature gradient at least equivalent to 700.degree. C. over a length of 50 mm from the point of melt contact for a cylindrical steel rod 25 mm in diameter when the probe is in contact with the molten metal at melt temperature. A method of testing a liquid molten melt is also provided.
REFERENCES:
patent: 3444726 (1969-05-01), Young et al.
patent: 3585865 (1971-06-01), Bungart et al.
patent: 4261197 (1981-04-01), Mansfield
patent: 4287755 (1981-09-01), Mansfield
patent: 4373950 (1983-02-01), Shingu et al.
patent: 4662215 (1987-05-01), Eckert
"Acoustic Methods", by V. M. Lantukh, et al., 2418 The Soviet Journal of NDT, vol. 15, May 1979, No. 5, pp. 404-410.
"Precipition Effects in Liquid Aluminum Alloys", by N. D. Mountford et al. Journal of the Institute of Metals 1959, vol. 88, pp. 121-127.
Arana Louis M.
Chapman John
The University of Toronto Innovations Foundation
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