METHOD FOR THE PRODUCTION OF A SIDERURGICAL PRODUCT MADE OF CARBON STEEL WITH A HIGH COPPER CONTENT, AND SIDERURGICAL PRODUCT OBTAINED ACCORDING TO SAID METHOD

摘要

The invention relates to a method for producing a siderurgical product made of carbon steel having a high copper content, according to which: - a liquid steel having the composition: 0.0005 % ≤ C ≤ 1 %; 0.5 ≤ Cu ≤ 10 %; 0 ≤ Mn ≤ 2 %; 0 ≤ Si ≤ 5 %; 0 ≤ Ti ≤ 0.5 %; 0 ≤ Nb ≤ 0.5 %; 0 ≤ Ni ≤ 5 %; 0 ≤ Al ≤ 2 %, the remainder being iron and impurities, is produced; - said liquid steel is poured directly in the form of a thin strip having a thickness of no more than 10 mm; - the strip is subjected to forced cooling and/or is surrounded by a non-oxidizing atmosphere while having a temperature of more than 1000? C; - said thin strip is hot rolled at a reduction rate of at least 10 %, the temperature at the end of the rolling process being such that all of the copper is still in a solid solution in the ferrite and/or austenite matrix; - the strip is then subjected to forced cooling so as to maintain the copper in an oversaturated solid solution in the ferrite and/or austenite matrix; - and the strip is coiled. The invention also relates to a siderurgical product obtained according to said method.