A kind of 1300mpa grade high toughness cold-formed steel plate and its production method

A production method and high-toughness technology, applied in the field of metallurgy, can solve the problems of cold-formed parts affecting the forming quality, hot-formed parts with poor toughness, and affecting structural safety, etc., achieving high strength, excellent performance, and guaranteed strength.

Active Publication Date: 2022-07-12
TANGSHAN IRON & STEEL GROUP +2
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  • Abstract
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Problems solved by technology

From the perspective of preparation, high-strength steel generally has the problems of high production cost and narrow process window; from the perspective of processing and manufacturing, with the increase of strength, the springback problem of high-strength steel cold-formed parts is prominent and seriously affects Forming quality, while hot-formed parts have problems such as poor toughness, difficulty in subsequent processing, and delayed cracking, which seriously affect structural safety

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  • A kind of 1300mpa grade high toughness cold-formed steel plate and its production method
  • A kind of 1300mpa grade high toughness cold-formed steel plate and its production method
  • A kind of 1300mpa grade high toughness cold-formed steel plate and its production method

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Embodiment 1-9

[0020] The production method of the 1300Mpa-grade high-toughness cold-formed steel plate of the present invention includes the steps of steelmaking, continuous casting, heating, rolling, acid rolling, continuous annealing, and leveling and leveling. The specific steps are as follows:

[0021] (1) Steelmaking process: including molten iron desulfurization and slagging, converter smelting, LF furnace refining, and RH vacuum treatment;

[0022] (2) Continuous casting process: During the casting process, control the surface and internal quality of the slab to prevent micro-cracks and secondary cracks on the surface of the slab;

[0023] (3) The heating process includes a heating section, a second heating section, a third heating section and a soaking section. The slab is in the furnace for 150-250min, the soaking section temperature is 1200-1300℃, and the soaking time is ≥35min.

[0024] (4) The rolling process includes rough rolling, hot coil box, finishing rolling, and laminar ...

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Abstract

A 1300Mpa-grade high-toughness cold-formed steel sheet and a production method thereof belong to the technical field of metallurgy. The chemical composition and mass percentage content of the steel plate are C: 0.1-0.2%, Mn: 1.8-2.5%, S≤0.005%, P≤0.02%, Si: 1.0-1.5%, Als≤0.08%, Nb: 0.01-0.04%, Ti: 0.02-0.08%, Ni: 1.0-2.0%, and the balance is Fe and inevitable impurities. The production method includes the steps of steelmaking, continuous casting, heating, rolling, acid rolling, continuous annealing, and leveling and leveling; the temperature of the soaking section of the continuous annealing step is 760-820 DEG C, and the holding time is 60-225s. The steel plate of the invention has a yield strength of ≥850 MPa, a tensile strength of ≥1300 MPa, and an elongation of A50 of ≥8%, has good cold forming performance, and meets the requirements of lightweight automobile steel.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and specifically relates to a 1300Mpa grade high-toughness cold-formed steel plate and a production method thereof. Background technique [0002] Vehicle lightweighting is an effective way to achieve energy saving and emission reduction, and it is necessary to ensure vehicle safety while reducing weight. High-strength steel has become an important basic material for advanced body structure manufacturing due to its excellent specific strength and specific stiffness. With the deepening of the understanding of alloying elements and the progress of preparation technology, the first generation of high-strength steel with strength as the main goal, the second-generation high-strength steel with high strength and plastic product as the main goal, and The third-generation advanced high-strength steel with comprehensive consideration of economic requirements. [0003] The use of high-strength steel i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C21D1/26C21D6/00C21D8/02C21D9/00
CPCC22C38/04C22C38/002C22C38/02C22C38/06C22C38/12C22C38/14C22C38/08C21D1/26C21D6/001C21D6/005C21D6/008C21D8/0221C21D9/0081C21D2211/005C21D2211/008Y02P10/20
Inventor 冯晓勇邝霜刘靖宝王朝田秀刚刘丽萍李可斌冯运莉王海涛
Owner TANGSHAN IRON & STEEL GROUP
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