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A kind of production method of hot-dip galvanized magnesium alloy steel plate

A production method and alloy steel plate technology, applied in the field of steel plate processing, can solve the problems of high production cost and poor corrosion resistance, and achieve the effects of low cost, low surface friction coefficient and high efficiency

Inactive Publication Date: 2017-02-15
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a production method of hot-dip galvanized magnesium alloy steel sheet, which solves the problems of poor corrosion resistance and high production cost of current galvanized magnesium alloy steel sheet

Method used

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  • A kind of production method of hot-dip galvanized magnesium alloy steel plate
  • A kind of production method of hot-dip galvanized magnesium alloy steel plate
  • A kind of production method of hot-dip galvanized magnesium alloy steel plate

Examples

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Effect test

Embodiment 1

[0027] A production method of a hot-dip galvanized magnesium alloy steel plate, the steps of which are as follows:

[0028] 1) IF steel is used as the substrate, and the specification is 0.8×1700m.

[0029] 2) The substrate first undergoes surface cleaning (hot water rinsing, electrolytic cleaning, and alkali cleaning in sequence), and after the surface residue is completely removed, it enters the annealing furnace for recrystallization annealing treatment, and the annealing temperature is 820°C.

[0030] 3) Control the temperature of the strip steel after annealing at 470°C, enter the zinc pot for hot-dip galvanizing treatment, control the running speed of the strip steel at 150m / min during galvanizing, control the temperature of the zinc pot at 460°C, and the aluminum in the zinc liquid The weight content is controlled at 0.21%, the weight content of magnesium is controlled at 1%, and the rest is zinc and unavoidable impurities. Among them, the impurity Fe must be controlled...

Embodiment 2

[0038] 1. a production method of hot-dip galvanized magnesium alloy steel plate, its steps are as follows:

[0039] 1) Choose cold-rolled DP strip steel as the substrate;

[0040] 2) The substrate first undergoes surface cleaning to remove surface residues and then enters an annealing furnace for recrystallization annealing at 840°C to obtain the required mechanical properties;

[0041] 3) Control the temperature of the strip steel after annealing at 530°C, enter the zinc pot for hot-dip galvanizing treatment, control the running speed of the strip steel at 95m / min during galvanizing, control the temperature of the zinc pot at 458°C, and the aluminum in the zinc liquid The weight content is controlled at 0.19%, the weight content of magnesium is controlled at 3%, and the rest is zinc and unavoidable impurities. Among them, the impurity Fe must be controlled below 0.01%, and the thickness of the surface zinc layer is controlled by adjusting the pressure of the nitrogen gas knif...

Embodiment 3

[0047] A production method of a hot-dip galvanized magnesium alloy steel plate, the steps of which are as follows:

[0048] 1) Select cold-rolled TRIP strip steel as the substrate;

[0049] 2) The substrate first undergoes surface cleaning to remove surface residues and then enters an annealing furnace for recrystallization annealing at 780°C;

[0050] 3) Control the temperature of the strip steel after annealing at 485°C, enter the zinc pot for hot-dip galvanizing treatment, control the running speed of the strip steel at 60m / min during galvanizing, control the temperature of the zinc pot at 462°C, and the aluminum in the zinc liquid The weight content is controlled at 0.25%, the weight content of magnesium is controlled at 6%, and the rest is zinc and unavoidable impurities. Among them, the impurity Fe must be controlled below 0.01%, and the thickness of the surface zinc layer is controlled by adjusting the pressure of the nitrogen gas knife. The thickness of the zinc layer...

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Abstract

The invention discloses a production method of a hot-dip galvanized magnesium alloy steel plate. The production method comprises the following steps: by taking cold-rolled IF, DP and TRIP band steel as a base plate, performing surface washing and annealing, afterwards sequentially performing hot-dip galvanizing, vacuum magnesium plating and alloying processes, and finally rolling the band steel after oil coating or passivated surface treatment. According to the production method disclosed by the invention, the hot-dip galvanizing process is combined with the magnesium plating process for the first time, and simultaneously the technical parameters of the galvanizing, magnesium plating and alloying processes are improved, so the obtained galvanized magnesium alloy steel plate has extremely good corrosion resistance and the red rust resistance of the steel plate is 3-10 times that of a steel plate which has a plated layer with the same thickness. The zinc-magnesium alloy plated layer prepared by the method disclosed by the invention is good in binding force with the base plate, so that diffusion of iron and zinc in the base plate and formation of a fragile zinc-iron alloy phase are avoided; as the surface zinc-magnesium alloy layer is large in hardness and quite compact, the plated layer has a relatively lower surface friction coefficient, which is more beneficial for stamping formation.

Description

technical field [0001] The invention relates to a production method of a hot-dip galvanized magnesium alloy steel plate, which belongs to the field of steel plate processing. Background technique [0002] With the rapid development of industries such as automobiles, construction, precision instruments, and heavy machinery, people put forward higher requirements for the corrosion resistance of steel plates. Generally speaking, increasing the thickness of the coating can effectively improve the corrosion resistance of the coating. The increase will also lead to the continuous increase of cost and waste of resources. The price of zinc in the current market has remained high for a long time. Therefore, it is of great significance to develop new alloy coated steel sheets with thin coating and high corrosion resistance. [0003] Judging from the current domestic and foreign reports, the zinc-magnesium alloy coating is one of the most industrialized zinc-based alloy coatings. Curr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C23C2/02C23C2/40C23C14/16C23C14/24C23C14/58
Inventor 颜飞黄勇陈晓海谭运刚李金毛利川苏衍战李祥钟荣飞
Owner 武汉钢铁有限公司
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