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Method for producing a metal strip

A metal strip and strip technology, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve problems such as high-cost processing or repair, and achieve high cooling rate, good mechanical properties, and small grain size. Effect

Active Publication Date: 2016-02-10
SMS GRP GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, costly rework or repair is required

Method used

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  • Method for producing a metal strip
  • Method for producing a metal strip

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Embodiment Construction

[0037] The rolling stand 2 of the finishing mill can be seen in the drawing. The strip 1 is rolled in the finishing mill and leaves the last rolling stand 2 in the conveying direction F. Immediately after the rolling gap of the last rolling stand 2 or already in the rolling gap of the last rolling stand 2, the strip 1 is cooled, for which rapid cooling 4 is applied, which is structurally corresponding In the classic structural form. The cooling medium (water) is sprayed on the upper and lower sides of the strip 1.

[0038] Immediately after the rapid cooling 4 is a cooling device 3 in the form of classic laminar cooling. In this embodiment, the cooling device 3 is divided into 10 sections.

[0039] In addition, it is worth mentioning that the length L of the rapid cooling 4 1 In this embodiment, a total of about 9 meters from the center of the rolling stand 2; as described, the rapid cooling is immediately after or in the rolling gap of the last rolling stand 2 Start.

[0040] H...

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Abstract

The invention relates to a method for producing a metal strip (1), in which the strip (1) is rolled in a multi-stand rolling mill, is removed behind the final rolling stand (2) of the rolling mill in the direction of conveyance (F), and is cooled in a cooling device (3). In order to achieve a favourable grain structure and a high degree of surface evenness, the strip or metal sheet (1) is subjected to additional rapid cooling (4) immediately after passing the working rollers of the final rolling stand (2), wherein the strip or the metal sheet (1) is cooled at least partially within the extent of the final rolling stand (2) in the direction of conveyance (F), wherein rapid cooling is performed by applying a coolant to the strip or metal sheet (1) from above and from below, wherein the volume flow of coolant that is applied to the strip or metal sheet (1) from below measures at least 120 % of the volume flow of coolant that is applied to the strip or metal sheet (1) from above.

Description

Technical field [0001] The present invention relates to a method for manufacturing a metal strip, in which the strip is rolled in a multi-stand rolling mill, is taken out in the conveying direction after the last rolling stand of the rolling mill and It is cooled in the cooling device. Background technique [0002] The mechanical properties of steel materials may be affected in many ways. Increased strength (mixed crystal hardening) is achieved by adding certain alloying elements. In addition, the temperature of the finishing mill can be lowered during rolling to achieve a higher blending density (incorporation hardening). The addition of microalloying elements (for example, Nb, V, or Ti) forms precipitates, which cause an increase in strength (precipitation hardening). However, these principles of action have the disadvantage of adversely affecting toughness. On the contrary, the fine-grain structure of the structure (fine-grain hardening) advantageously acts on the strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/02
CPCB21B45/0218B21B2201/06
Inventor A·斯普罗科
Owner SMS GRP GMBH