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Zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy and hot-dip galvanizing method

A zinc-aluminum-silicon-magnesium, zinc alloy technology, applied in hot dip plating process, metal material coating process, coating and other directions, can solve the problem of unsuitable hot plating quality, achieve good overall brightness, increase high corrosion resistance , Improve the effect of anti-scratch and anti-recrystallization performance

Active Publication Date: 2022-03-01
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hot-dip galvanized alloy with good fluidity, thin coating, no color difference, bright and clean coating, good scratch resistance and recrystallization resistance, and effectively solve the problem of existing problems. Some zinc alloys cannot be applied to the technical problems of hot-dip quality on the surface of steel materials with complex components and structures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy S1, based on the total mass of the zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy, contains 35wt% Al, 1.0wt% Si, 1.0wt% Mg, 0.05wt% Mo, and the balance is Zn and unavoidable impurities in zinc alloys. The alloy structure is a "Tian"-shaped short-axis crystal, the alloy grain size is 5-8 μm, the primary η-Zn phase accounts for less than 8%, and the eutectic structure and eutectoid structure reach more than 75%.

[0028] The zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy S1 of this embodiment is used to hot-dip the narrow strip, the strip speed is 220 m / min, the thickness of the formed coating is uniform, and the thickness distribution of the coating is 10-13g / m2 , Good adhesion test (excellent grade), bright and clean coating (grade 10), good scratch resistance (grade 3.5), recrystallization temperature of the coating is 240°C.

Embodiment 2

[0030] A zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy S2, its composition contains 25wt% of Al, 1.2wt% of Si, 1.0wt% of Mg, 0.1wt% of Mo, and the balance is Zn and the inevitable zinc alloy. of impurities. The alloy structure is a "Tian"-shaped short-axis crystal, the alloy grain size is 8-10 μm, the primary η-Zn phase accounts for less than 20%, and the eutectic structure and eutectoid structure reach more than 70%.

[0031] The zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy S2 of this embodiment is used to hot-dip the narrow strip, the strip speed is 220 m / min, the thickness of the formed coating is uniform, and the thickness distribution of the coating is 13-18g / m 2 , Good adhesion test (excellent grade), bright and clean coating (grade 10), good scratch resistance (grade 3.5), recrystallization temperature of the coating is 190°C.

Embodiment 3

[0033] A zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy S3, its composition contains 25wt% of Al, 0.5wt% of Si, 0.3wt% of Mg, 0.01wt% of Mo, and the balance is Zn and the inevitable zinc alloy. of impurities. The alloy structure is a "Tian"-shaped short-axis crystal, the alloy grain size is 10-12 μm, the primary η-Zn phase accounts for less than 20%, and the eutectic structure and eutectoid structure reach more than 70%.

[0034] The zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy S3 of this embodiment is used to hot-dip the strip steel, the strip speed is 180 m / min, the thickness of the formed coating is uniform, and the thickness distribution of the coating is 16~20g / m 2 , the adhesion test is good (excellent grade), the coating is bright and clean (grade 10), the scratch resistance is good (grade 3.5), and the recrystallization temperature of the coating is 140°C.

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Abstract

The invention provides a zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy, which comprises 25-40 wt% of Al, 0.3-1.8 wt% of Si, 0.05-1.8 wt% of Mg, 0.005-0.1 wt% of Mo, and the balance of Zn and inevitable impurities carried by the zinc alloy, the hot-dip alloy structure is a short-axis crystal shaped like a Chinese character'tian ', the grain size of the alloy is 5-12 [mu] m, the proportion of a primary eta-Zn phase is less than 20%, and the number of eutectic structures and eutectoid structures reaches more than 70%. The hot-dip alloy disclosed by the invention not only can improve the fluidity, thin a plating layer and reduce the galvanizing cost, but also can eliminate the chromatic aberration of the plating layer, the plating layer is bright and bright, meanwhile, the scratch resistance and the recrystallization resistance can be remarkably improved, and the hot-dip alloy has an excellent application prospect.

Description

technical field [0001] The invention belongs to the technical field of hot-dip galvanizing, and in particular relates to a zinc-aluminum-silicon-magnesium-molybdenum hot-dip alloy and a hot-dip galvanizing method. Background technique [0002] With the rapid development of industries such as communications, electric power, automobiles, ships, home appliances, construction, and aquaculture, the demand for hot-dip galvanized products is increasing year by year, and the requirements for product quality are constantly improving. The principle of hot-dip galvanizing is: clean the rust on the surface of steel parts by pickling or atmosphere reduction, then immerse in zinc alloy liquid or directly immerse in zinc alloy liquid after solvent treatment and drying; iron on the surface of steel parts reacts with molten zinc, An alloy coating is formed on the surface of the steel structure. In order to reduce costs, improve the corrosion resistance, surface characteristics and good mech...

Claims

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Application Information

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IPC IPC(8): C22C18/04C23C2/06
CPCC22C18/04C23C2/06
Inventor 张伟高盟朱铭明占杨方陆兴茂苗华磊赵为上彭海良徐军易洪亮
Owner ZHUZHOU SMELTER GRP