Method for producing RE510L steel of thin specification based on ESP sheet billet continuous coasting and rolling procedure

A thin-slab continuous casting and thin-gauge technology, which is applied in the direction of metal rolling, can solve the problems of high cost and high energy consumption of hot rolling, and achieve the effects of reduced rolling passes, stable performance, and small dimensional tolerances

Active Publication Date: 2017-06-13
RIZHAO STEEL HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the purpose of the present invention is to provide a method for producing thin gauge RE510L steel based on the ESP thin slab continuous casting and rolling process, so as to solve the problems of high cost and high energy consumption of traditional hot rolling, and achieve energy saving, environmental protection and cost reduction. Purpose

Method used

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  • Method for producing RE510L steel of thin specification based on ESP sheet billet continuous coasting and rolling procedure
  • Method for producing RE510L steel of thin specification based on ESP sheet billet continuous coasting and rolling procedure
  • Method for producing RE510L steel of thin specification based on ESP sheet billet continuous coasting and rolling procedure

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Effect test

Embodiment 1

[0045] In the embodiment, the process of producing RE510L steel by the all-endless ESP thin slab continuous casting and rolling process is iron mixing furnace → molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rolling → laminar cooling → coiling → slow Cold → smooth → finished product.

[0046] In this embodiment, raw materials such as molten iron and steel scrap are sequentially subjected to converter smelting, LF refining, and RH refining, and the composition of molten steel is controlled as C: 0.035Wt%; Si: 0.15Wt%; Mn: 1.05Wt%; Als: 0.032Wt%; Nb: 0.012 Wt%; Ti: 0.013Wt%; S: 0.0020Wt%; P: 0.012Wt%; N: 0.0032Wt%. The balance is Fe.

[0047] The molten steel refined by LF and RH goes through continuous casting, rough rolling, induction heating, finishing rolling, laminar cooling, coiling and tempering of ESP production line to produce hot-rolled steel strips of different thicknesses.

[0048] In the continuous casting process, the superheat of the tundi...

Embodiment 2

[0058] In the embodiment, the process of producing RE510L steel by the all-endless ESP thin slab continuous casting and rolling process is iron mixing furnace → molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rolling → laminar cooling → coiling → slow Cold → smooth → finished product.

[0059] In this embodiment, raw materials such as molten iron and steel scrap are sequentially subjected to converter smelting, LF refining, and RH refining, and the composition of molten steel is controlled as C: 0.038Wt%; Si: 0.18Wt%; Mn: 1.08Wt%; Als: 0.030Wt%; Nb: 0.018 Wt%; Ti: 0.013Wt%; S: 0.0020Wt%; P: 0.012Wt%; N: 0.0035Wt%, the balance being Fe.

[0060] The molten steel refined by LF and RH goes through continuous casting, rough rolling, induction heating, finishing rolling, laminar cooling, coiling and tempering of ESP production line to produce hot-rolled steel strips of different thicknesses.

[0061] In the continuous casting process, the superheat of the tun...

Embodiment 3

[0070] In the embodiment, the process of producing RE510L steel by the all-endless ESP thin slab continuous casting and rolling process is iron mixing furnace → molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rolling → laminar cooling → coiling → slow Cold → smooth → finished product.

[0071] In this embodiment, raw materials such as molten iron and steel scrap are sequentially subjected to converter smelting, LF refining, and RH refining, and the composition of molten steel is controlled as C: 0.040Wt%; Si: 0.20Wt%; Mn: 1.10Wt%; Als: 0.032Wt%; Nb: 0.020 Wt%; Ti: 0.013Wt%; S: 0.0025Wt%; P: 0.012Wt%; N: 0.0033Wt%. The balance is Fe.

[0072] The molten steel refined by LF and RH goes through continuous casting, rough rolling, induction heating, finishing rolling, laminar cooling, coiling and tempering of ESP production line to produce hot-rolled steel strips of different thicknesses.

[0073] In the continuous casting process, the superheat of the tundi...

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Abstract

The invention provides a method for producing RE510L steel of a thin specification based on an ESP sheet billet continuous coasting and rolling procedure. The method includes the steps that raw materials are selected, and the raw materials comprise, in percentage by mass, 0.03-0.07% of C, 0.10-0.40% of Si, 0.90-1.40% of Mn, 0.02-0.04% of Als, 0.008-0.020% of Ti, 0.01-0.03% of Nb, less than or equal to 0.0030% of S, less than or equal to 0.015% of P, less than or equal to 0.004% of N and the balance Fe elements; the raw materials are subjected to converter smelting and LF furnace and RH furnace refining; molten steel formed through RH furnace refining generates hot rolling strip steel of different thicknesses through an ESP production line; in the ESP production line, the rough rolling outlet temperature is 920-980 DEG C, the finish rolling outlet temperature is 800-870 DEG C; the hot rolling strip steel is cooled in a front segment laminar flow cooling manner, and the hot rolling strip steel is cooled to 550-620 DEG C and then enters a recoiling machine to be coiled into coiled strip steel; and after the coiled strip steel is cooled, leveling, coiling and entering warehouse are performed by adopting the leveling quantity of 1-2.0%. By means of the method, problems that traditional hot rolling is high in cost, energy consumption is large and the like are solved.

Description

technical field [0001] The invention relates to the technical field of metal material processing and forming, and more specifically, relates to a method for producing thin gauge RE510L steel based on the ESP thin slab continuous casting and rolling process. Background technique [0002] In recent years, with the continuous decline of the steel market, steel has been in a state of meager or no profit, forcing steel manufacturers to explore ways to reduce costs. At present, the domestic emphasis on environmental protection has been further strengthened, and environmental protection requirements are unprecedentedly strict. Therefore, Exploring cost-reducing and environmentally friendly steel production processes has become a very necessary way of survival. [0003] Making full use of ESP to develop and apply new products is in line with the national overall planning and industry planning, in line with the relevant policies and regulations of the national transfer and creation, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/06C22C38/14C22C38/12B21B1/46
CPCB21B1/46C22C33/04C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 谢国海秦哲刘宏志王福良朱经涛狄丽华严进宝吴进罗继锋于长江喻尧杜希恩王学伦刘守杰安守勇孙庆强季伟斌
Owner RIZHAO STEEL HLDG GROUP
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