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Method for producing highly-reaming hot-dip galvanized sheet with tensile strength of 540 MPa

A hot-dip galvanized sheet, tensile strength technology, applied in hot-dip galvanizing process, coating, metal material coating process, etc. The effect of eliminating the heating process of the heating furnace and reducing the energy consumption

Active Publication Date: 2018-12-21
RIZHAO STEEL HLDG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from this that the traditional production process of hot-dip galvanized sheet is cumbersome and complicated, and the cost is high

Method used

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  • Method for producing highly-reaming hot-dip galvanized sheet with tensile strength of 540 MPa
  • Method for producing highly-reaming hot-dip galvanized sheet with tensile strength of 540 MPa
  • Method for producing highly-reaming hot-dip galvanized sheet with tensile strength of 540 MPa

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Embodiment 1-4

[0030]The technological process of the method for producing the hot-dip galvanized sheet with high tensile strength of 540MPa and high expansion hole of the present invention is: first prepare the molten iron of required composition, wherein the composition of the molten iron of each embodiment is as shown in Table 1 (unit is wt.%) , pretreatment of molten iron, converter steelmaking and LF furnace refining, and then enter the ESP production line to produce hot-rolled strip steel. In the ESP production line, the molten iron is refined by RH furnace, cast by continuous casting machine, rough rolled by rough rolling mill, pendulum shear, stacker, rotary hub type flying shear, electromagnetic induction heating, high pressure water descaling and finish rolling. The hot-rolled steel strip is then coiled and put into storage after undergoing segmental layer cooling to obtain hot-rolled raw material coils. After inspection, the hot-rolled raw material coils are transferred to the con...

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Abstract

The invention discloses a method for producing a highly-reaming hot-dip galvanized sheet with the tensile strength of 540 MPa and belongs to the technical field of hot-dip galvanized sheets. The technical solution is as follows: (1) preparing molten iron; (2) pretreating the molten iron, and performing converter steelmaking and LF furnace refining; (3) after treatment by the LF furnace, performingtreatment on an ESP production line, so that a hot-rolled strip steel with the thickness of 1.0 4.0 mm is prepared; (4) cooling the hot-rolled strip steel obtained in step (3), reeling the cooled hot-rolled strip steel and putting the same into a warehouse, so that a hot-rolled raw material reel is prepared; and step (5), after the prepared hot-rolled raw material reel is inspected, transferringthe hot-rolled raw material reel to a PGL acid-plating continuous production line for hot galvanizing, so that the hot-dip galvanized sheet is prepared. The tensile strength of the hot-dip galvanizedsheet produced through the method disclosed by the invention is greater than 540 MPa; and compared with a traditional hot-dip galvanized sheet production method, the method disclosed by the inventionhas the advantages that the process procedure is shortened and the energy saving and cost reduction are achieved.

Description

technical field [0001] The invention relates to the technical field of hot-dip galvanized sheets, in particular to a method for producing hot-dip galvanized sheets with a tensile strength of 540 MPa and high hole expansion. Background technique [0002] With the development of the automobile industry, in order to meet the needs of different environments for corrosion resistance of auto parts, prolong the service life of automobiles, and reduce maintenance costs, ordinary hot-cold-rolled sheets and pickled sheets cannot meet the requirements of the automobile industry. Hot-dip galvanized sheet is one of the most effective ways to improve the corrosion resistance of auto parts. [0003] Tensile strength 540MPa high hole expansion hot-dip galvanized sheet, as a strain of advanced galvanized sheet, has been widely used in parts such as automobile chassis, wheels and automobile panels with complex shapes due to its good formability. In countries with a relatively developed aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/28C22C38/06C21D8/02C23C2/06C23C2/40
CPCC21D8/0226C22C38/02C22C38/04C22C38/06C22C38/28C23C2/06C23C2/40
Inventor 李远旭宁顺利包红军魏代斌周洪宝孟凡凌
Owner RIZHAO STEEL HLDG GROUP
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