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Alloying hot galvanizing dual-phase steel and preparation method thereof

An alloying and hot-dip galvanizing technology is applied in the field of cold-rolled hot-dip galvanized steel, which can solve the problems of reducing the cooling rate, hindering the cooling process of strip steel, and unable to obtain martensite equality, so as to improve hardenability and bendability. , the effect of improving elongation and bending

Inactive Publication Date: 2018-12-28
SHOUGANG CORPORATION
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, unlike the continuous annealing process, in the alloying galvanizing process, the galvanizing temperature and alloying temperature hinder the cooling process of the strip and reduce the cooling rate, so that a sufficient amount of martensite phase cannot be obtained, and high hardenable Alloying elements

Method used

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  • Alloying hot galvanizing dual-phase steel and preparation method thereof
  • Alloying hot galvanizing dual-phase steel and preparation method thereof
  • Alloying hot galvanizing dual-phase steel and preparation method thereof

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Embodiment Construction

[0033] The invention solves the defects of the existing hot-dip galvanized dual-phase steel in mechanical properties and preparation methods by providing an alloyed hot-dip galvanized dual-phase steel and a preparation method thereof.

[0034] In order to solve the above problems, the main ideas of the embodiments of the present invention are:

[0035] The alloyed hot-dip galvanized dual-phase steel in the embodiment of the present invention includes the following chemical components in weight percent:

[0036] C: 0.10% to 0.15%, Si: 0.2% to 0.5%, Mn: 2.0% to 2.4%, Alt: 0.02% to 0.05%, Ti: 0.015% to 0.03%, Cr: 0.4% to 0.6%, Mo: 0.1%~0.3%, P≤0.01%, S≤0.01%, N≤0.005%, the balance is Fe and trace elements.

[0037] The embodiment of the present invention can prepare alloyed hot-dip galvanized dual-phase steel through a conventional continuous annealing production line, for example, including the following steps:

[0038] After the molten steel is smelted in a converter, a slab ...

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Abstract

The invention provides alloying hot galvanizing dual-phase steel and a preparation method thereof. The alloying hot galvanizing dual-phase steel comprises, by weight, 0.10%-0.15% of C, 0.2%-0.5% of Si, 2.0%-2.4% of Mn, 0.02%-0.05% of Alt, 0.015%-0.03% of Ti, 0.4%-0.6% of Cr, 0.1%-0.3% of Mo, less than or equal to 0.01% of P, less than or equal to 0.01% of S, less than or equal to 0.005% of N, andthe balance Fe and microelements. According to the alloying hot galvanizing dual-phase steel, the 980 MPa grade alloying hot galvanizing dual-phase steel is obtained by designing a reasonable alloyingcomponent system and determining a reasonable process method matched with the alloy component system; and the extension ratio and bend property of the alloying hot galvanizing dual-phase steel are improved, and the alloying hot galvanizing dual-phase steel meets the special requirement of automobile parts for processing performance.

Description

technical field [0001] The invention belongs to the technical field of cold-rolled hot-dip galvanized steel, and in particular relates to an alloyed hot-dip galvanized dual-phase steel and a preparation method thereof. Background technique [0002] With the development of automobiles in the direction of energy saving, environmental protection, safety and comfort, while the body is developing in the direction of lightweight, the requirements for corrosion resistance and impact resistance are also getting higher and higher. Coupled with the competitive pressure from materials such as aluminum, magnesium, and plastics, steel sheets for automobiles are forced to develop in the direction of high-strength coatings. With the continuous expansion of the use of these high-strength alloyed steel sheets, the requirements for formability are also getting higher and higher, such as high elongation, bendability, hole expansion and so on. [0003] The microstructure of dual-phase steel (D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/06C22C38/28C22C38/22C22C38/38C22C33/04C21D8/02
CPCC21D8/0205C22C33/04C22C38/02C22C38/06C22C38/22C22C38/28C22C38/38
Inventor 姜英花韩赟谢春乾刘华赛
Owner SHOUGANG CORPORATION
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