Metal treatment – Compositions – Heat treating
Patent
1975-06-30
1978-11-21
Stallard, W.
Metal treatment
Compositions
Heat treating
266 51, 324238, 324240, B23K 706, B23K 710
Patent
active
041264916
ABSTRACT:
Method and apparatus for producing metal blanks, in particular steel slabs, which at least in a predetermined surface area have substantially no defects such as cracks, seams, bubbles, scabs, or the like, at least the surface portion to be made free of defects being systematically and substantially completely scanned by means of at least one inspecting device which detects such defects at and closely beneath the surface as regards location and depth and a working means being controlled by means of the recorded defects, which by scarfing, grinding, milling, planing and/or another cutting machine and/or local material melt deposition and/or material replacement or the like removes the defects detected, the defects being recorded with their depth for surface sub-areas whose width transversely of the working means is substantially equal or less than the smallest working width of the working means and the working depth of the working means being controlled in accordance with the maximum defect depth recorded for the particular surface sub-area to be worked.
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Granges Oxelosund Jarnverk AB
Stallard W.
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