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Thick-specification galvanized steel plate for elevator and manufacturing method thereof

A technology of galvanized steel sheet and manufacturing method, which is applied in hot-dip plating process, coating, metal material coating process and other directions, can solve the problems of insufficient adhesion, moiré on the surface of the coating, uneven thickness of the coating, etc.

Active Publication Date: 2019-07-12
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of insufficient adhesion between the galvanized steel plate and the steel plate in the prior art, moire easily appearing on the surface of the plated layer, uneven thickness of the plated layer, and poor surface quality after color coating, the present invention provides a thick gauge galvanized steel plate for elevators and Its manufacturing method, through the improvement of the substrate material and the hot-dip galvanizing process, the thick-gauge galvanized steel plate has strong adhesion to the steel plate, the coating is smooth and uniform, the surface quality after color coating is high, and the performance is excellent.

Method used

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  • Thick-specification galvanized steel plate for elevator and manufacturing method thereof
  • Thick-specification galvanized steel plate for elevator and manufacturing method thereof
  • Thick-specification galvanized steel plate for elevator and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A thick gauge galvanized steel sheet for an elevator in this embodiment comprises:

[0057] Substrate, which is composed of the following elements in mass percentage: at most 0.060% C, at most 0.040% Si, 0.10-0.25% Mn, at most 0.015% P, at most 0.010% S, at most 0.035% Als, the balance being Fe and unavoidable impurities;

[0058] A hot-dip galvanized layer is formed on the surface of the substrate.

[0059] Specifically, in this embodiment, the substrate is composed of the following mass percentages: 0.040% C, 0.020% Si, 0.15% Mn, 0.010% P, 0.002% S, 0.035% Als, wherein Mn / Si=7.5, C+Si+3( P+S)=0.096%;

[0060] The coating contains 0.15% Al;

[0061] A method for manufacturing a thick-gauge galvanized steel sheet for an elevator in this embodiment, the thickness of the substrate is 1.8mm after being smelted and rolled; it also includes the following processing steps:

[0062] 1. Substrate pretreatment: carry out alkali cleaning, electrolytic degreasing, rinsing and ...

Embodiment 2

[0068] A thick gauge galvanized steel sheet for elevators in this embodiment is further improved on the basis of Example 1, and color-coated on the galvanized steel sheet in Example 1, wherein the passivation temperature during the color-coating process is 80 ℃, the curing furnace temperature is 240 ℃, the surface quality of the galvanized steel plate after color coating reaches FC level, and the hardness of the topcoat reaches HB level. After the reverse impact test, the impact resistance of the coating can reach 15J.

[0069] The galvanized steel plate after the color coating of the present embodiment is carried out neutral salt spray corrosion test, and experimental condition is sodium chloride salt solution mass percentage 5%, pH value 6.5~7.0, spray volume (80cm 2 Area) 1 ~ 2ml / h, spray pressure 90 ~ 100KPa, spray temperature 35 ℃, duration 600h, no obvious corrosion marks on the surface of galvanized steel sheet.

Embodiment 3

[0071] A thick gauge galvanized steel sheet for an elevator in this embodiment comprises:

[0072]Substrate, which is composed of the following elements in mass percentage: at most 0.060% C, at most 0.040% Si, 0.10-0.25% Mn, at most 0.015% P, at most 0.010% S, at most 0.035% Als, the balance being Fe and unavoidable impurities;

[0073] A hot-dip galvanized layer is formed on the surface of the substrate.

[0074] Specifically, in this embodiment, the substrate is composed of the following mass percentages: 0.020% C, 0.040% Si, 0.10% Mn, 0.010% P, 0.002% S, 0.035% Als, wherein Mn / Si=2.5, C+Si+3( P+S)=0.096%;

[0075] The coating contains 0.10% Al;

[0076] A method for manufacturing a thick-gauge galvanized steel sheet for an elevator in this embodiment, the thickness of the substrate is 2.0mm after being smelted and rolled; it also includes the following processing steps:

[0077] 1. Substrate pretreatment: carry out alkali cleaning, electrolytic degreasing, rinsing and d...

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Abstract

The invention discloses a thick-specification galvanized steel plate for an elevator and a manufacturing method thereof and belongs to the technical field of hot-dip galvanized steel plates. The thick-specification galvanized steel plate comprises a base plate and is composed of following components which include, by mass percentage, maximum 0.060% of C, maximum 0.040% of Si, 0.10-0.25% of Mn, maximum 0.015% of P, maximum 0.010% of S, maximum 0.035% of Als, and the balance Fe and inevitable impurities. A hot-dip galvanized layer is formed on the surface of the base plate and comprises 0.10-0.30% of Al by mass percentage. The base plate comprises 0.035% of Als by mass percentage. The thickness of the base plate is 1.4-2.0 mm. The weight of the hot-dip galvanized layer is 160-275 g / m2. According to the thick-specification galvanized steel plate, by improving the components of the galvanized steel plate and the base plate hot-dip galvanizing technology, after the base plate is subjected to hot-dip galvanizing with the thickness larger than or equal to 1.4 mm, adhesive force of a plated layer is strong, the surface and the edge are smooth and free of cloud patterns, it is ensured thatthe galvanized steel plate is high in surface quality after being coated in a coloring manner. The thick-specification galvanized steel plate for the elevator is reasonable in design, low in manufacturing cost and applicable to industrialized production.

Description

technical field [0001] The invention belongs to the technical field of hot-dip galvanized steel sheet processing, and more specifically relates to a thick-gauge galvanized steel sheet for elevators and a manufacturing method thereof. Background technique [0002] In recent years, with the rapid development of the construction industry, elevators have become an indispensable infrastructure for high-rise buildings. During the use of elevators, the shaft is dark and humid all the year round, especially in coastal environments, and thin-coated elevator panels are prone to edge-cutting corrosion; large elevators, especially freight elevators, have high requirements for the strength of elevator panels. Therefore, elevator manufacturers propose to upstream material suppliers It meets the requirements of high strength and high corrosion resistance. [0003] The color-coated sheet is mainly made of galvanized sheet as the base material, and the surface is compounded with an organic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C23C2/02C23C2/06C21D1/26C23C2/20
CPCC21D1/26C22C38/002C22C38/02C22C38/04C22C38/06C23C2/02C23C2/06C23C2/20
Inventor 周忠臣赵云龙杨兴亮王滕李伟刚刘劼柴立涛何峰
Owner MAANSHAN IRON & STEEL CO LTD
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