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A kind of high cold bending performance automobile steel and its manufacturing method

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

Active Publication Date: 2020-08-11
MAANSHAN IRON & STEEL CO LTD
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  • 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

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  • A kind of high cold bending performance automobile steel and its manufacturing method
  • A kind of high cold bending performance automobile steel and its manufacturing method
  • A kind of high cold bending performance automobile steel and its manufacturing method

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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

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Abstract

The invention discloses an automobile steel with high cold-bending performance and a manufacturing method thereof, belonging to the field of automobile steel manufacturing. The mass percentage of each component of high cold bending performance automotive steel is: C 0.01~0.25%, Si 0.10~0.50%, Mn 0.96~2.00%, P≤0.02%, S≤0.01%, N≤0.01%, Al 0.01~ 0.06%, Cr 0.10~0.50%, Nb 0.01~0.06%, V 0.01~0.06%, Ti 0.03~0.05%, the balance is Fe and unavoidable impurities, made by the following process, 1. Smelting; 2. Casting slab ; Three, hot rolling; four, cold rolling; five, annealing; six, thermoforming. In the present invention, through the addition of micro-alloying elements of specific components and in conjunction with a specific manufacturing process, the steel plate is manufactured to meet the strength and toughness requirements of automobiles and has 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

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Application Information

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Patent Type & Authority Patents(China)
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
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