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Treatment method of high strength corrosion resistant steel pipe

A treatment method and anti-corrosion technology, applied in metal material coating process, fusion spraying, coating, etc., can solve the problems of restricting the application of steel pipes, improve application ability, simple and convenient treatment method, improve surface strength and durability The effect of corrosive ability

Active Publication Date: 2019-04-02
JIANGSU FANLI STEEL TUBE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the strength of the steel pipe is contradictory to its own hollow structure. Although the hollow structure can reduce weight and save metal consumption, the lack of strength limits the application of steel pipes in many fields.

Method used

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  • Treatment method of high strength corrosion resistant steel pipe
  • Treatment method of high strength corrosion resistant steel pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A steel pipe surface treatment method, comprising the following steps:

[0035] (1) Perform rapid temperature rise treatment on the surface of the steel pipe, including preheating the steel pipe so that the temperature reaches 220°C, then heat preservation treatment for 2 hours, and then heat up to 360°C at a speed of 20°C / min;

[0036] (2) Use a high-temperature spraying device to evenly spray the composite powder onto the surface of the steel pipe to form a build-up reinforcement layer;

[0037] Based on the total amount of composite powder, the weight percentage of each powder is: carbon powder 5%, manganese powder 8%, copper powder 2%, zinc powder 30%, and the rest is aluminum powder;

[0038] The average particle diameter of described carbon powder, aluminum powder, manganese powder, copper powder and zinc powder is 420nm;

[0039] Control the amount of spraying so that the thickness of the accumulation enhancement layer formed after spraying is 15 μm;

[0040] (...

Embodiment 2

[0042] As in the steel pipe surface treatment method provided in Example 1, the difference is that the composition of the composite powder used is different: based on the total amount of composite powder, the weight percentage of each powder is: carbon powder 3%, manganese 6% copper powder, 1% copper powder, 28% zinc powder, and the rest is aluminum powder;

[0043] The rest remain unchanged, and the treatment of the steel pipe is completed according to the treatment method provided in Example 1.

Embodiment 3

[0045] As in the steel pipe surface treatment method provided in Example 1, the difference is that the composition of the composite powder used is different: based on the total amount of the composite powder, the weight percentage of each powder is: carbon powder 7%, manganese 10% copper powder, 3% copper powder, 32% zinc powder, and the rest is aluminum powder;

[0046] The rest remain unchanged, and the treatment of the steel pipe is completed according to the treatment method provided in Example 1.

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Abstract

The invention belongs to the technical field of steel pipe machining, and in particular relates to a treatment method of a high strength corrosion resistant steel pipe. The treatment method comprisesthat rapid temperature-rising treatment is conducted to the surface of a steel pipe, Then a composite powder body is uniformly sprayed onto the surface of the steel tube by a high temperature sprayingapparatus to form a stacked reinforcing layer, and a reinforced effect is obtained after the steel pipe is annealed; according to the treatment method of the steel pipe, a composite power body is ejected and melt on the surface of the steel pipe so that an accumulated reinforcing layer can be formed by conducting heat treatment to the surface of the steel pipe and by a method of high-temperaturespraying, and the surface strength and the corrosion assistance ability of the surface strength of the steel pipe can be remarkably increased by the accumulated reinforcing layer; according to the treatment method of the steel pipe, reinforcing treatment can be conducted to the surface of the existing steel pipe, application ability is improved, the treatment method is simple and convenient, and the prospect of mass production application is achieved.

Description

technical field [0001] The invention belongs to the technical field of steel pipe processing, and in particular relates to a processing method for high-strength corrosion-resistant steel pipes. Background technique [0002] Steel pipes are steel products with a hollow cross-section whose length is much greater than the diameter or circumference. According to the shape of the cross-section, it can be divided into circular, square, rectangular and special-shaped steel pipes. According to the material, it can be divided into carbon structural steel pipes, low-alloy structural steel pipes, Alloy steel pipes and composite steel pipes; divided into pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment, etc. according to their uses; Steel pipes and welded steel pipes, among which seamless steel pipes are divided into two types: hot-rolled and cold-rolled (drawn), and welded steel pipes are...

Claims

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Application Information

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IPC IPC(8): C23C4/067C23C4/12C23C4/16C23C4/18
CPCC23C4/12C23C4/16C23C4/18C23C4/067
Inventor 彭静吴宏根葛兰李勇王云飞
Owner JIANGSU FANLI STEEL TUBE
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