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Method for improving rust resistance of end of bar by utilizing spray

An anti-corrosion and terminal technology, which is applied in the direction of metal material coating process, etc., can solve the problems of affecting use and terminal corrosion

Active Publication Date: 2021-06-25
广西柳钢华创科技研发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This invention provides a method of using spray to improve the anti-corrosion ability of the end of the bar to solve the problem that after the bar is cut, the end will be rusted and affect the use The problem

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  • Method for improving rust resistance of end of bar by utilizing spray
  • Method for improving rust resistance of end of bar by utilizing spray

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Embodiment Construction

[0018] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention is now described.

[0019] The working principle of the present invention is: the applicant finds that Fe can be accelerated under humid high-temperature environment 3 o 4 The formation of the oxide film, that is, the formation of a blue end face on the end face. Therefore, the applicant believes that it is possible to simulate a humid and high-temperature environment to accelerate Fe 3 o 4 The formation of the oxide film, for example, when shearing, ensures a high temperature and forms a humid condition at the same time, which can form a suitable Fe 3 o 4 Oxide film.

[0020] 1. Temperature guarantee: 18-stand hot rolling mill is used to produce Φ25mm specification HRB400E hot-rolled ribbed steel bars according to GB / T 1499.2-2018 "Steel for Reinforced Concrete Part 2: Hot-rolled Ribbed Steel Bars" without cutting process . The...

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Abstract

The invention provides a method for improving the rust resistance of the end of a bar by utilizing spray. The method for improving the rust resistance of the end of the bar by utilizing the spray comprises the steps of shearing the bar by using a dividing shear; and after shearing of the dividing shear is finished, applying the spray to the end of the bar within 3 seconds, wherein the component of the spray is water mist or hydrogen peroxide mist. Through the measures, it can be guaranteed that a shearing opening of a steel bar at the dividing shear is clean and is located in a humid, high-temperature and oxygen-enriched environment, an iron matrix of the shearing opening is combined with oxygen to form a layer of Fe3O4 oxide film to protect the end of the steel bar, and the thickness of the Fe3O4 oxide film is greater than that of an air-cooled steel bar. The thickness of the oxide film layer is 2-5 [mu]m, and the mass percentage of O of the surface Fe3O4 oxide film during energy spectrum analysis is 5-15%.

Description

technical field [0001] The invention relates to the field of iron and steel production and manufacturing, in particular to a method for improving the anti-corrosion ability of the ends of rods by spraying. Background technique [0002] According to GB / T 1499.2-2018 "Steel for Reinforced Concrete Part 2: Hot-rolled Ribbed Steel Bars" and "GB / T 1499.1-2017 Steel for Reinforced Concrete Part 1: Hot-Rolled Round Steel Bars", the surface of the produced steel bars is During production, a layer of oxide film will be formed at high temperature to slow down the corrosion of steel bars. In the production process of conventional straight hot-rolled ribbed steel bars, the cut-to-length method is mechanical shearing. After shearing, the metal substrates of the two end faces of the straight steel bars are directly exposed to the air. Once they are in contact with water during storage and transportation , Rust will appear immediately, affecting the appearance of the product, affecting sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/76C23C22/68
CPCC23C22/76C23C22/68Y02P70/10
Inventor 钱学海袁勤攀吴海林甘贵平陈学良何维胡鳌全李西德钱炫廷李宗强付林梅肖娟
Owner 广西柳钢华创科技研发有限公司