Steel for vehicles with high cold bending performance and manufacturing method thereof

A manufacturing method and performance technology, applied in the field of high cold-formability automotive steel and its manufacturing, can solve problems such as poor cold-formability of steel plates

Active Publication Date: 2019-10-18
MAANSHAN IRON & STEEL CO LTD
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem of poor cold-bending performance of steel sheets for automobiles in the prior art, the present invention provides a steel with high cold-bending performance for automobiles and a manufacturing method thereof, through the addition of specific compositional microalloying elements and a specific manufacturing process, to manufacture steel sheets Meet the strength and toughness requirements of automobiles and have high cold bending performance

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
  • Steel for vehicles with high cold bending performance and manufacturing method thereof
  • Steel for vehicles with high cold bending performance and manufacturing method thereof
  • Steel for vehicles with high cold bending performance and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072]Embodiments 1 to 6 select 6 groups of elements with different components for smelting respectively, wherein RE=0.025% is added by mass percentage in embodiment 1, RE=0.035% is added by mass percentage in embodiment 2, and RE=0.035% is added by mass percentage in embodiment 3. Add RE=0.037%, add RE=0.023% by mass percentage in embodiment 4, add RE=0.036% by mass percentage in embodiment 5, add RE=0.024% by mass percentage in embodiment 6, respectively each embodiment After smelting and casting slabs according to different elemental components, final products are prepared according to the process parameters in Table 2 and Table 3.

[0073] Table 2 Production Process Parameters (Part 1)

[0074] Example Baking temperature ℃ Finishing temperature ℃ Coil temperature ℃ Annealing temperature ℃ 1 1236 891 550 762 2 1235 890 551 762 3 1240 886 600 761 4 1235 888 600 762 5 1000 850 500 700 6 1250 900 600 800

...

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 steel for vehicles with high cold bending performance and a manufacturing method thereof, and belongs to the field of vehicle steel manufacturing. The steel for the vehicles with high cold bending performance comprises the following components in percentage by mass: 0.01-0.25% of C, 0.10-0.50% of Si, 0.96-2.00% of Mn, P not more than 0.02%, S not more than 0.01%, N not morethan 0.01%, 0.01-0.06% of Al, 0.10-0.50% of Cr, 0.01-0.06% of Nb, 0.01-0.06% of V, 0.03-0.05% of Ti, and the balance of Fe and inevitable impurities; and the steel is prepared through the processes of (1) smelting, (2) blank casting, (3) hot rolling, (4) cold rolling, (5) annealing and (6) hot molding. Through feeding of specific components-microalloy elements and cooperation with the specific manufacturing processes, manufactured steel plates meet the vehicle strength and toughness demands, and achieve high cold bending performance.

Description

technical field [0001] The invention belongs to the field of steel manufacturing for automobiles, and more specifically relates to a steel for automobiles with high cold bending performance and a manufacturing method thereof. Background technique [0002] Automobile lightweight technology is one of the key technologies to adapt to the trend of modern automobile safety, energy saving and environmental protection. At present, more and more automobile body parts use thermoforming technology (such as: automobile bumper, anti-collision beam, A-pillar, B-pillar , door bumper, etc.). Thermoforming technology is a new process that divides forming and strengthening into two steps to produce ultra-high-strength auto parts. The parts produced have the advantages of ultra-high strength, high forming precision, and avoiding springback of high-strength steel cold forming. The high-strength steel plate, exemplified by 22MnB5, is currently the most researched and applied thermoformed struc...

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): C22C38/02C22C38/04C22C38/06C22C38/24C22C38/26C22C38/28C22C38/38C21D8/02C22C33/04
CPCC21D8/0205C21D8/0226C21D8/0236C21D8/0247C21D8/0278C22C33/04C22C38/02C22C38/04C22C38/06C22C38/24C22C38/26C22C38/28C22C38/38
Inventor 晋家春谷海容王蕾崔磊刘阳
Owner MAANSHAN IRON & STEEL CO LTD
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