Sollac

Arcelor France

Anne Dez

Colin Scott

Philippe Cugy

Daniel Pernet

Maurita Roscini

Dominique Cornette

Claude Grisvard

Franck Braconnier

Iron-carbon-manganese austenitic steel sheet, the chemical composition of which comprises, the contents being expressed by weight: 0.45%&#x2266;C&#x2266;0.75%; 15%&#x2266;Mn&#x2266;26%; Si&#x2266;3%; Al&#x2266;0.050%; S&#x2266;0.030%; P&#x2266;0.080%; N&#x2266;0.1%; at least one metal element chosen from vanadium, titanium, niobium, chromium and molybdenum, where 0.050%&#x2266;V&#x2266;0.50%; 0.040%&#x2266;Ti&#x2266;0.50; 0.070%&#x2266;Nb&#x2266;0.50%; 0.070%&#x2266;Cr&#x2266;2%; 0.14%&#x2266;Mo&#x2266;2%; and, optionally, one or more elements chosen from 0.0005%&#x2266;B&#x2266;0.003%; Ni&#x2266;1%; Cu&#x2266;5%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the amounts of said at least one metal element in the form of precipitated carbides, nitrides or carbonitrides being: 0.030%&#x2266;V&#x2266;0.150%; 0.030%&#x2266;Ti&#x2266;0.130%; 0.040%&#x2266;Nb&#x2266;0.220%; 0.070%&#x2266;Cr&#x2266;0.6%; 0.14%&#x2266;Mo&#x2266;0.44%.

Method for producing austenitic iron-carbon-manganese metal sheets, and sheets produced thereby

A probe is provided for measuring the wear of a wall in a metallurgical vessel. The probe includes at least two electrically conducting elements which extend generally mutually parallel, and a tubular sheath wherein the electrically conducting elements extend interiorly of said sheath, and are mutually insulated via a refractory insulator. The probe is adapted to be implanted in the transverse direction in the wall of a metallurgical vessel with the distal end of each of the two electrically conducting elements being disposed at the interior surface of said wall. A measurement system is connected to the opposite proximal ends of the electrically conducting elements for measuring an electrical characteristic of the circuit formed by said elements that depends on the length of the elements. The probe has a diameter less than 1 mm achieved by stretching after the components have been assembled into an intermediate assembly having a larger cross sectional area than the final cross section.

Apparatus and method of continuously measuring the wear of a wall of a metallurgical vessel

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Plappeville, France

Anne Dez