Hot-dip galvanizing method for high-strength steel

A hot-dip galvanizing and hot-dip galvanizing technology, which is applied in hot-dip galvanizing process, metal material coating process, coating, etc., can solve the problems of large fluctuations in the content of alloy elements and the quality of hot-dip galvanized coatings, and reduce the coating quality. The proportion of brittle phase, good corrosion resistance, the effect of eliminating phase and structure

Active Publication Date: 2019-12-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the problem that the fluctuation of alloy element content in different high-strength steels affects the quality of the hot-dip galvanized coating during hot-dip galvanizing, and provides a hot-dip galvanizing method for high-strength steels

Method used

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  • Hot-dip galvanizing method for high-strength steel
  • Hot-dip galvanizing method for high-strength steel
  • Hot-dip galvanizing method for high-strength steel

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Embodiment 1

[0033] Embodiment 1: a kind of hot-dip galvanizing method of high-strength steel, specifically as follows:

[0034] The thickness of the high-strength steel plate in the actual galvanizing experiment is 2 mm, and the chemical composition (mass percentage) contained is C: 0.023, Si: 0.28, Mn: 1.17, P: 0.007, S: 0.003, Mo: 0.365, Al: 0.041.

[0035] Using this high-strength steel hot-dip galvanizing process for hot-dip galvanizing, the microstructure of the coating cross-section and the surface morphology of the coating are as follows figure 1 , figure 2 shown. The specific steps of the hot-dip galvanizing method are as follows:

[0036] (1) High-frequency heating: According to the formula in step (1), the heating frequency is determined to be 40 kHz, and the heating temperature is 600° C. for 1 minute and air-cooled. Realize high-frequency heating only on the surface of high-strength steel. Due to the heating, the alloy elements contained in the surface of high-strength ste...

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Abstract

The invention discloses a hot-dip galvanizing method for high-strength steel, and belongs to the technical field of steel hot-dip galvanizing processing. According to the hot-dip galvanizing method, the following steps are carried out to process the formed high-strength steel, the steps are of high-frequency heating, acid pickling, washing, plating assistant treatment, drying, hot-dip galvanizing,placing the high-strength steel subjected to hot-dip galvanizing at room temperature for air cooling, and arranging and collecting after air cooling. The hot-dip galvanizing method utilizes the skineffect of induced current to heat the surface layer of the formed high-strength steel in a high-frequency heating furnace, so that alloying elements contained on the surface of the high-strength steelare changed, the phase and the structure which are unfavorable to the quality of a zinc coating are eliminated, the property of the whole steel is not influenced, the hot-dip galvanized steel which is excellent in quality, proper in thickness and bright in surface can be manufactured, and the proportion of the brittle phase of the zinc coating is effectively reduced; and meanwhile, the mechanicalproperty of the high-strength steel is obviously improved, and the corrosion resistance property is good.

Description

Technical field: [0001] The invention belongs to the technical field of hot-dip galvanizing of steel, and more specifically relates to a hot-dip galvanizing method for high-strength steel. Background technique: [0002] Hot-dip galvanizing is the most widely used and cost-effective steel surface treatment method in the world. Practice has shown that the hot-dip galvanizing process plays an inestimable and irreplaceable role in corrosion reduction, life extension, energy saving and material saving of steel. Studies have shown that hot-dip galvanizing has triple protection for steel: ① isolation corrosion protection; ② cathodic corrosion protection; ③ corrosion product protection. [0003] In recent decades, as the concept of energy saving and emission reduction has gradually become popular, many industrial manufacturing fields, including automobile manufacturing, have put forward lighter and safer materials. Therefore, the promotion and use of high-strength steel has always ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/02
CPCC23C2/02C23C2/06
Inventor 钱健清张明亚李鹏程陈峰张乐
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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