High-elongation hot-rolled structure regulated and controlled steel with tensile strength greater than or equal to 1200 MPa and production method

A technology with high tensile strength and high elongation, applied in heat treatment process control, heat treatment equipment, manufacturing tools, etc., can solve problems such as unsatisfactory requirements, and achieve the effect of reducing alloy costs

Active Publication Date: 2020-06-12
武汉钢铁有限公司
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of this invention is only 1.0-3.0mm, which cannot meet the require

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
  • High-elongation hot-rolled structure regulated and controlled steel with tensile strength greater than or equal to 1200 MPa and production method
  • High-elongation hot-rolled structure regulated and controlled steel with tensile strength greater than or equal to 1200 MPa and production method
  • High-elongation hot-rolled structure regulated and controlled steel with tensile strength greater than or equal to 1200 MPa and production method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] The present invention will be described in detail below:

[0048] Table 1 is a list of the chemical component values ​​of each embodiment and comparative example of the present invention;

[0049] Table 2 is a list of main process parameters of each embodiment and comparative example of the present invention;

[0050] Table 3 is a list of performance detection conditions of various embodiments of the present invention and comparative examples.

[0051] Each embodiment of the present invention is produced according to the following steps:

[0052] 1) RH vacuum furnace treatment is carried out after converter smelting, and the RH treatment time is not less than 15 minutes, and then the molten steel is continuously cast into billets and electromagnetically stirred during the continuous casting process;

[0053] 2) Heating the slab, the heating temperature is controlled at 1200~1240℃, and the heating time is 50~70min;

[0054] 3) Carry out stage rolling, during which, control the finis...

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

No PUM Login to view more

Abstract

The invention discloses high-elongation hot-rolled structure regulated and controlled steel with the tensile strength greater than or equal to 1200 MPa. The steel comprises the following components of, by weight, 0.19%-0.21% of C, 1.60%-1.80% of Mn, 0.60%-0.70% of Si, less than or equal to 0.008% of P, less than or equal to 0.002% of S and 0.02%-0.04% of Als. The production method comprises the following steps that smelting is performed by a converter, and then RH vacuum furnace treatment is performed; a casting blank is heated; staged rolling is performed; staged variable-speed cooling is performed; coiling is performed; heat preservation is performed; and leveling treatment is performed. According to the steel and the production method, under the condition that Nb, V, Mo and other alloysare not added, it can be guaranteed that the tensile strength is 1200 MPa or above, the elongation is greater than or equal to 15%, the thickness of a steel plate is 7-12 mm, then the forming requirement of thick-specification high-strength steel can be met, and the alloy cost is reduced by at least 10%.

Description

technical field [0001] The invention relates to a hot-rolled steel for automobiles and a production method thereof, in particular to a high-elongation hot-rolled structure control steel with a tensile strength greater than 1200MPa and a production method; and is suitable for steel plates with a thickness of 7-12mm. Background technique [0002] In recent years, the automotive industry, especially commercial vehicles, semi-trailers, passenger cars and other market segments, has become more and more urgent to reduce weight. Related manufacturers have put forward clear requirements for vehicle weight reduction to meet the mandatory national standard GB1589-2016, etc. regulatory requirements. On the one hand, the wheels, axles, saddles and other structural parts of commercial vehicles and other models need to be drawn, reamed and other forming processes in the manufacturing process. There are clear requirements for edge forming performance. On the other hand, the thickness of s...

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): C22C38/06C22C38/04C22C38/02C21C7/10C21D8/02C21D11/00
CPCC21C7/10C21D8/0205C21D8/0247C21D11/005C21D2211/001C21D2211/002C21D2211/008C22C38/002C22C38/02C22C38/04C22C38/06
Inventor 刘斌李利巍邹航杨海林陆在学张扬刘登文梁文何亚元
Owner 武汉钢铁有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap