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Method for producing thin REH380LA steel based on ESP thin slab continuous casting and rolling process

A thin slab continuous casting, thin gauge technology, applied in the field of metal material processing and forming, to achieve the effect of reducing costs

Active Publication Date: 2017-05-31
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 REH380LA steel based on the ESP thin slab continuous casting and rolling process, to solve the problems of subsequent cold rolling and annealing in the traditional production technology, and to meet the requirements of REH380LA automotive steel Strength, elongation and other performance and dimensional accuracy requirements

Method used

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  • Method for producing thin REH380LA steel based on ESP thin slab continuous casting and rolling process
  • Method for producing thin REH380LA steel based on ESP thin slab continuous casting and rolling process
  • Method for producing thin REH380LA steel based on ESP thin slab continuous casting and rolling process

Examples

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Embodiment 1

[0048] Select raw materials, wherein the raw materials include: 0.045% C, 0.21% Si, 0.80% Mn, 0.012% P, 0.0020% S, 0.028% Alt, 0.013% Ti, 0.020% Nb by mass percentage , 0.0025% N, the rest is iron and unavoidable impurities;

[0049] The raw materials are sequentially smelted in converter, LF furnace and RH furnace;

[0050] The molten steel refined by LF and RH passes through ESP production line continuous casting, rough rolling, finish rolling, laminar cooling, coiling and pickling process to produce hot-rolled strip steel of different thickness;

[0051] Among them, in the ESP production line, the continuous casting process controls the superheat of the tundish to 18°C, the casting speed to 5.6m / min, and the thickness of the slab to 95mm;

[0052] The cast slab is rolled through three passes of rough rolling, the rough rolling inlet temperature is 1020°C, and the rough rolling exit temperature is 980°C;

[0053] The rough-rolled intermediate billet product is heated by an...

Embodiment 2

[0060] Select the raw materials, wherein the raw materials include: 0.048% C, 0.20% Si, 0.79% Mn, 0.010% P, 0.0020% S, 0.028% Alt, 0.012% Ti, 0.019% Nb by mass percentage , 0.0028% N, the rest is iron and unavoidable impurities;

[0061] The raw materials are sequentially smelted in converter, LF furnace and RH furnace;

[0062] The molten steel refined by LF and RH passes through ESP production line continuous casting, rough rolling, finish rolling, laminar cooling, coiling and pickling process to produce hot-rolled strip steel of different thickness;

[0063] Among them, in the ESP production line, the continuous casting process controls the superheat of the tundish to 20°C, the casting speed is 5.6m / min, and the thickness of the slab is 95mm;

[0064] The cast slab is rolled through three passes of rough rolling, the rough rolling inlet temperature is 1000°C, and the rough rolling exit temperature is 980°C;

[0065] The rough-rolled intermediate billet product is heated b...

Embodiment 3

[0072] Select raw materials, wherein the raw materials include: 0.046% C, 0.20% Si, 0.81% Mn, 0.011% P, 0.0022% S, 0.030% Alt, 0.012% Ti, 0.020% Nb by mass percentage , 0.0025% N, the rest is iron and unavoidable impurities;

[0073] The raw materials are sequentially smelted in converter, LF furnace and RH furnace;

[0074] The molten steel refined by LF and RH passes through ESP production line continuous casting, rough rolling, finish rolling, laminar cooling, coiling and pickling process to produce hot-rolled strip steel of different thickness;

[0075] Among them, in the ESP production line, the continuous casting process controls the superheat of the tundish to 18°C, the casting speed is 5.5m / min, and the thickness of the slab is 95mm;

[0076] The cast slab is rolled through three passes of rough rolling, the rough rolling inlet temperature is 980°C, and the rough rolling exit temperature is 960°C;

[0077] The rough-rolled intermediate billet product is heated by an ...

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Abstract

The invention provides a method for producing thin REH380LA steel based on an ESP thin slab continuous casting and rolling process. The method includes the steps that raw materials are selected, and the raw materials comprise, by mass, 0.04-0.10% of C, 0.15-0.50% of Si, 0.50-0.10% of Mn, 0.008-0.04% of Alt, 0.008-0.04% of Ti, 0.010-0.030% of Nb, 0.0010-0.0030% of S, 0.0080-0.0130% of P, no more than 0.0035% of N, and the balance Fe; the raw materials are sequentially smelted in a converter, an LF furnace and an RH furnace; molten steel obtained after refining in the RH furnace is manufactured into hot-rolled strip steel of different thicknesses through an ESP production line, wherein, in the ESP production line, the temperature of a rough rolling outlet is 920-980 DEG C, and the temperature of a fine rolling outlet is 800-870 DEG C; and the hot-rolled strip steel is cooled to 530-680 DEG C, and then the strip steel enters a winder to be wound and stored in a warehouse. By means of the method, the problems that subsequent cold rolling and annealing are required in the traditional production technology 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 REH380LA 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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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C22C38/12C22C33/04C21D8/02
CPCC21D8/0226C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
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刘春颖郑万任于长江喻尧鲍生科安守勇陈金伟孙庆强季伟斌
Owner RIZHAO STEEL HLDG GROUP
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