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Hot-rolled coated steel bar for on-line spraying anti-corrosive coating material and preparation method thereof

A technology for anti-corrosion materials and spraying equipment, applied in the direction of coating, metal material coating process, melt spraying, etc., can solve the problems of high cost and low efficiency, achieve convenient operation, stable process, delay oxidation or corrosion Effect

Inactive Publication Date: 2019-10-18
HUNAN 3T NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are processed after the steel bar has been rusted, which has high cost and low efficiency.

Method used

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  • Hot-rolled coated steel bar for on-line spraying anti-corrosive coating material and preparation method thereof
  • Hot-rolled coated steel bar for on-line spraying anti-corrosive coating material and preparation method thereof
  • Hot-rolled coated steel bar for on-line spraying anti-corrosive coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Please refer to image 3 , is a schematic diagram of Example 1 of the method for preparing hot-rolled clad steel bars with on-line spray coating of anti-corrosion coating materials provided by the present invention. In this embodiment, an aluminum cladding material with a thickness of 0.07 mm is sprayed on the surface of a HPB300 round steel with a diameter of 12 mm in three sections as an example to illustrate the method for preparing a hot-rolled clad steel bar with an on-line spray-coated anti-corrosion cladding material of the present invention. The round steel is hot-rolled by the hot rolling mill 10, and the line speed at the output of the hot rolling mill is 10m / s, and the weight of the aluminum coating on the surface of the single-line steel bar per hour is about:

[0038] Round steel diameter*3.14*coating thickness*aluminum density*exit line speed*3600 seconds=0.12(dm)*3.14*0.07(mm) / 100*2.7(kg / dm)*100(dm / s)* 3600s = 256kg.

[0039]Each hot-rolled steel bar 11...

Embodiment 2

[0042] Please refer to Figure 4 , is a schematic diagram of Example 2 of the method for preparing hot-rolled clad steel bars with on-line spray-coated anti-corrosion coating materials provided by the present invention. In this embodiment, the method of the present invention is illustrated by spraying a 0.10 mm stainless steel cladding layer on the surface of HRB400 rebar with a diameter of 18 mm in two sections as an example. The line speed of the rebar at the outlet of the hot rolling mill is 6 m / s, and the weight of the stainless steel cladding on the surface of the single-line steel bar per hour is about:

[0043] Rebar diameter*3.14*coating thickness*stainless steel density*exit line speed*3600 seconds=0.18(dm)*3.14*0.10(mm) / 100*8.9(kg / dm)*60(dm / s)* 3600s = 1086kg.

[0044] Each hot-rolled steel bar 11 is provided with six groups of spraying equipment 12 correspondingly. The spraying equipment 12 is a high-speed electric arc spraying machine. There are three sets of ho...

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Abstract

The invention provides a preparation method of a hot-rolled coated steel bar for on-line spraying anti-corrosive coating material. The method is characterized in that after the hot-rolled steel bar isoutput by a hot rolling machine, a layer of anti-corrosion material is thermally sprayed on surface of the hot-rolled steel bar through an on-line spraying mode, and the anti-corrosion material is attached to the surface of hot-rolled steel bar to form an anti-corrosive coating. The preparation method of the hot-rolled clad steel bar for the on-line spraying anti-corrosive coating material provided by the invention has the advantages that after the hot-rolled steel bar is formed, a layer of anti-corrosion and rust-proof material is thermally sprayed on the surface of the steel bar, a firm coating layer is generated, and the steel bar is prevented or delayed from being oxidized or corrode. The method can be directly completed on an existing hot-rolled steel bar production line, mechanicalproperty and production of the hot-rolled steel bar are not influenced, the operation is convenient, and the process is stable. The invention further provides a hot-rolled coated steel bar for on-linespraying anti-corrosive coating material.

Description

technical field [0001] The invention relates to the technical field of steel bar anti-corrosion treatment, in particular to a hot-rolled coated steel bar for online spraying of anti-corrosion coating materials and a preparation method thereof. Background technique [0002] Most of the existing steel bars on the market are produced by hot rolling process, and the surface rusts quickly. Generally, the steel bars will be obviously rusted after being placed in the open air for 3-10 days, especially affected by the weather and storage environment, and the air humidity is relatively high. Under severe conditions, corrosion will occur even in one day, resulting in a decline in the appearance and quality of the steel bar. The extremely poor surface condition of the steel bar seriously affects the service and life of the steel bar. [0003] The reason why the steel bar is easy to rust is that the steel bar matrix is ​​directly in contact with the atmospheric environment to cause cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/131C23C4/129C23C4/16C23C4/08
CPCC23C4/08C23C4/16C23C4/129C23C4/131
Inventor 曾麟芳李聚良向勇
Owner HUNAN 3T NEW MATERIAL
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