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

A technology of steel products and carbon content, which is applied in the manufacture of steel and iron-based alloys, and can solve problems such as not giving details of steel plate processing

Inactive Publication Date: 2005-06-29
USINOR SA
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  • Application Information

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Problems solved by technology

However, the document does not give details of the processing after casting to produce steel plates suitable for industrial applications

Method used

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  • 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
  • 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
  • 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

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Embodiment Construction

[0048] First, a liquid metal having the following composition (all contents are expressed in weight percent) was produced.

[0049] In particular, the carbon content may range from 0.0005% to 1%, depending on the intended application of the final article. The lower limit of 0.0005% practically corresponds to the smallest value possible by conventional methods of decarburizing liquid metals. The upper limit of 1% was justified via the gammagenic effect of carbon. Above 1%, carbon excessively reduces the solubility of copper in ferrite. Furthermore, above 1%, the weldability of the steel would be significantly impaired, which would render the steel unsuitable for the numerous preferred applications of the steel obtainable from the steel of the invention.

[0050] In addition, carbon causes a hardening effect and, if a large amount of titanium and / or niobium is present in the steel, leads to the precipitation of titanium carbide and / or niobium carbide used to control the textur...

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Abstract

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% 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;-and the strip is coiled. The invention also relates to a siderurgical product obtained according to said method.

Description

technical field [0001] The present invention relates to the field of manufacture of iron-based alloys, more particularly of steel with a high copper content. Background technique [0002] In carbon steels, copper is generally considered an undesirable element, because on the one hand it promotes the formation of cracks when heated, complicating the hot working of steel, and on the other hand it adversely affects the quality of the product and surface appearance. For these reasons, the copper content of high-quality carbon steels is usually limited to less than 0.05%. Since the copper present in the liquid steel cannot be removed, this low copper content can only be reliably achieved by making steel from liquid cast iron, and this is only done on a large scale or when carefully refined by smelting in an electric arc furnace. It is only economically feasible to make iron and steel from selected and thus expensive iron and steel shavings. [0003] However, in some cases it i...

Claims

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Application Information

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IPC IPC(8): B21B1/46B21B3/00B22D11/00B22D11/06B22D11/12B22D11/22C21D8/00C21D8/04C21D9/46C22C38/00C22C38/04C22C38/16
CPCC21D8/0415C21D8/0426C21D8/0473C21D2211/001C21D2211/004C21D2211/005C22C1/02C22C38/04C22C38/16C21D8/04
Inventor N·P·盖尔东M·法拉尔J-P·比拉C·尤卡姆
Owner USINOR SA
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