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Hot-dipped Al-Zn steel plate with yield strength being 550MPaand manufacturing method thereof

A technology of yield strength and manufacturing method, applied in hot dip plating process, coating, metal material coating process, etc., can solve the problems of low production efficiency, low elongation, high manufacturing cost, and achieve high production efficiency and saving energy for reliable results

Active Publication Date: 2018-11-23
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a 550MPa yield strength hot-dip galvalume steel sheet and its manufacturing method, which mainly solves the problems of high manufacturing cost, low production efficiency and low elongation of the 550MPa yield strength hot-dip galvanized steel sheet in the prior art. Technical problems, to meet the construction industry's demand for plastic processing of high-strength hot-dip galvanized steel sheet roll forming

Method used

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  • Hot-dipped Al-Zn steel plate with yield strength being 550MPaand manufacturing method thereof
  • Hot-dipped Al-Zn steel plate with yield strength being 550MPaand manufacturing method thereof
  • Hot-dipped Al-Zn steel plate with yield strength being 550MPaand manufacturing method thereof

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Embodiment 4

[0054] Example 4 The yield strength R of the hot-dip galvanized steel sheet P0.2 is 642MPa, the tensile strength Rm is 744MPa, and the elongation after breaking is A 80mm It is 11%, which shows that low-cost, high-yield strength, and high-elongation galvanized sheet manufacturing has been realized through low-cost composition design combined with rapid heating annealing technology.

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Abstract

The invention relates to a hot-dipped Al-Zn steel plate with yield strength being 550MPa and a manufacturing method thereof and mainly aims to solve the technical problems in the prior art that a hot-dipped Al-Zn steel plate with yield strength being 550MPa is high in manufacturing cost and low in production efficiency and elongation. According to the hot-dipped Al-Zn steel plate with the yield strength being 550MPa, the base plate of the hot-dipped Al-Zn steel plate comprises the following chemical components in percentage by weight: 0.05%-0.06% of C, 0-0.05% of Si, 1.0%-1.2% of Mn, 0-0.015%of P, 0-0.015% of S, 0.061%-0.080% of Nb and the balanceFe and unavoidable impurities. The metallographic structure of the hot-dipped Al-Zn steel plate is fibrous ferrite, cementite and tiny niobium carbide precipitate; the percentage elongation after fracture of the hot-dipped Al-Zn steel plate with the thickness being 0.60-0.80 mm is 10-18%; and the hot-dipped Al-Zn steel plate is mainly used for components of a construction steel structure.

Description

technical field [0001] The invention relates to a cold-rolled hot-dip galvalume steel sheet, in particular to a hot-dip galvanized steel sheet with a yield strength of 550 MPa and a manufacturing method thereof, in particular to a hot-dip galvanized steel sheet with a yield strength of 550-650 MPa and its production method. The manufacturing method belongs to the technical field of iron-based alloys. Background technique [0002] In recent years, the market demand for cold-rolled hot-dip galvanized steel sheets in China has been increasing, and the competition has become more and more fierce. Also increasing. [0003] High-strength hot-dip aluminum-zinc (alloy coating) steel sheet has excellent atmospheric corrosion resistance and high temperature corrosion resistance. The spangles on the surface of the coating are beautiful and smooth, with good appearance and can reduce the amount of steel. It is mainly used in the construction industry (Main target market), used as roof...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C33/04C23C2/06C23C2/40C21D8/02
CPCC21D8/0226C22C33/04C22C38/02C22C38/04C22C38/12C23C2/06C23C2/40
Inventor 丁志龙孙永旭
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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