Method of determining the suitability of continuously cast slabs

Details Method of determining the suitability of continuously cast slabs Method of determining the suitability of continuously cast slabs

1975-03-14

1976-03-02

Woodiel, Donald O.

Measuring and testing

Surface and cutting edge testing

73432R, 148128, G01N 1908

Patent

active

039409767

ABSTRACT:
A method of determining the suitability of continuously cast slabs of Al- or Al-Si-killed soft steel for producing cold rolled sheets to be tinned, wherein from the cast strand a transverse sample of a length of 50 to 150 mm, preferably 100 mm, is taken by making parallel cuts perpendicular to the thickness of the strand, and a slanting cut is made from the one end of the sample starting from the surface thereof, which at the other end of the sample is 30 mm deep, whereupon a Baumann print is made of this cut area, which shows inclusion clouds as brown spots; upon this the whole area of the inclusion clouds is planimetered and the planimetered area in mm.sup.2 is put in relationship to the slanting cut area in dm.sup.2 ; a use of such steels having a characteristic value thus determined of maximally 5 mm.sup.2 /dm.sup.2.

REFERENCES:
patent: 3583216 (1971-06-01), Milewski

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