Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Strip steel and production method and system thereof

A strip and hot continuous rolling technology, applied in the field of steel, can solve the problems of accelerated consumption of scarce resources, complicated management, low process efficiency, etc., to achieve the effects of diversified production, cleanliness control, and easy removal

Inactive Publication Date: 2012-02-08
SHOUGANG CORPORATION
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the needs of users for products with different strengths, various iron and steel enterprises often adopt the method of adjusting the chemical composition, and the development of iron and steel production is characterized by large-scale, continuous, and intensive production, which will increase production costs and accelerate the consumption of scarce resources. At the same time, it also increases the difficulty of controlling the composition of the smelting process, making smelting, continuous casting, and rolling face the complexity of connection technology and management caused by frequent replacement of steel types
Moreover, in the traditional steelmaking process in the past, molten iron was desulfurized by KR desulfurization device pretreatment→converter smelting→external refining process, because the dephosphorization and desimination of molten iron were carried out in the same converter together with decarburization during the converter smelting process, The process efficiency is low, and at the same time, the cleanliness of molten steel cannot be controlled to the greatest extent

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Strip steel and production method and system thereof
  • Strip steel and production method and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] See attached figure 1 , the molten iron is desulfurized by KR desulfurization device 1, KR deS; converter 2 for deP and Si; smelting converter 3 for deC; LF refining device 4 for refining; Si0.21%, Mn1.34%, P0.014%, S0.003%, V0.021%, Ti0.017%, Alt 0.047%, the rest is Fe and impurity slab 15, the carbon equivalent of slab 15 is 0.39, and the specification is thickness × width = 230mm × 1500mm. Then, make the slab pass through the 2250 hot continuous rolling wide strip mill, that is, successively pass through the heating furnace 6, the rough descaling machine 7, the two-roll rough rolling mill 8, the four-roll rough rolling mill 9, the cutting head flying shear 10, the fine descaling machine 11, The finishing rolling unit 12, the laminar flow cooling device 13, and the coiler 14 carry out continuous hot rolling, wherein the temperature of the heating furnace 6 is 1260° C., and the heating time is 3.5 hours. The finish rolling temperature of the finishing rolling unit 12 ...

Embodiment 2

[0032] See attached figure 1 , the molten iron is desulfurized by KR desulfurization device 1, KR deS; converter 2 for deP and Si; smelting converter 3 for deC; LF refining device 4 for refining; Si0.21%, Mn1.34%, P0.014%, S0.003%, V0.021%, Ti0.017%, Alt0.047%, the rest is Fe and impurity slab 15, the carbon of slab 15 The equivalent is 0.39, and the specification is thickness × width = 230mm × 1500mm. Then, make the slab pass through the 2250 hot continuous rolling wide strip mill, that is, successively pass through the heating furnace 6, the rough descaling machine 7, the two-roll rough rolling mill 8, the four-roll rough rolling mill 9, the cutting head flying shear 10, the fine descaling machine 11, The finishing rolling unit 12, the laminar flow cooling device 13, and the coiler 14 carry out continuous hot rolling, wherein the temperature of the heating furnace 6 is 1240° C., and the heating time is 3.5 hours. The finish rolling temperature of the finishing rolling unit ...

Embodiment 3

[0035]The molten iron is desulfurized by KR desulfurization device 1, desulfurized by KR; deP and Si by converter 2; decarbonized by smelting converter 3; refined by LF refining device 4; .21%, Mn1.29%, P0.013%, S0.001%, V0.021%, Ti0.019%, Alt0.05%, the rest is Fe and impurity slab 15, the carbon equivalent of slab 15 is 0.39, and the specification is thickness × width = 230mm × 1600mm. Then, make the slab pass through the 2250 hot continuous rolling wide strip mill, that is, successively pass through the heating furnace 6, the rough descaling machine 7, the two-roll rough rolling mill 8, the four-roll rough rolling mill 9, the cutting head flying shear 10, the fine descaling machine 11, The finishing rolling unit 12, the laminar flow cooling device 13, and the coiler 14 carry out continuous hot rolling, wherein the temperature of the heating furnace 6 is 1200°C, the heating time is 3.0 hours, the finishing rolling temperature of the finishing rolling unit 12 is 840°C, and the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Yield strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses strip steel and a production method and system thereof, belonging to the technical field of steel products. The strip steel produced by using the production method and system comprises the following chemical components in percentage by weight: 0.12-0.18% of C, not more than 0.30% of Si, 1.20-1.40% of Mn, not more than 0.020% of P, not more than of 0.012% of S, 0.02-0.06% of Alt, 0.010-0.025% of V, 0.010-0.025% of Ti and the balance of Fe and impurities. Combined with different processing conditions of a hot continuous rolling mill in the hot continuous rolling process, the production system is capable of respectively producing the steels of the Q345q series bridges and Q370q series bridges with the chemical components in the same percentage of weight. The diversified production is realized while simplifying the smelting and continuous casting operations and management. The strip steel has lower content of Si and ensures that the generated ferric oxide sheet is easy to remove, and the content of P as an impurity element is also lower.

Description

technical field [0001] The invention relates to the technical field of steel products, in particular to a strip steel, its production method and its production system. Background technique [0002] With the development of modern science and technology and economy, my country's bridge construction has made great progress. The wide adoption of new designs, new materials, and new techniques has continuously improved the level of design and construction of bridges in our country. The strength grade and toughness of steel for bridges in my country have also been continuously improved, and the welding performance has continued to improve. [0003] At present, the hot-rolled coils of bridge steel are mainly produced by medium and heavy plate rolling mills, and the grades are mostly Q345q series and Q370q series. In order to meet the needs of users for products with different strengths, various iron and steel enterprises often adopt the method of adjusting the chemical compositio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C38/14C21C1/02C21C1/04C21C5/28B21B1/46
Inventor 方圆阳代军朱立新张宏艳赵运堂李永林王文广艾矫健
Owner SHOUGANG CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com