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A special-shaped steel pipe resistant to hydrogen sulfide corrosion and its preparation method

A special-shaped steel pipe, hydrogen sulfide resistance technology, applied in the field of special-shaped steel pipe, can solve the problems of poor corrosion performance, poor cold bending and welding performance, etc., and achieve the effects of low cost, simple production process and good economic benefits

Inactive Publication Date: 2016-11-30
肇庆艾格特不锈钢制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the H resistance of special-shaped steel pipes in the prior art 2 Insufficient technology of poor corrosion performance of S, poor cold bending and welding performance, providing a H 2 Special-shaped steel pipe with excellent S corrosion performance, good cold bending and welding performance and resistance to hydrogen sulfide corrosion and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A special-shaped steel pipe resistant to hydrogen sulfide corrosion, the chemical composition is as follows by weight percentage: carbon 0.18%, silicon 0.12%, manganese 0.8%, chromium 0.95%, molybdenum 0.62%, titanium 0.01%, phosphorus 0.008%, sulfur 0.002%, rhenium 0.06%, nitrogen 0.002%, aluminum 0.02%, rare earth 0.2%, nickel + vanadium + niobium 0.1%, and the rest is iron. Wherein the rare earth is the rare earth element lanthanum.

[0020] A method for preparing a special-shaped steel pipe resistant to hydrogen sulfide corrosion, comprising the steps of electric furnace smelting, ladle refining, steel ingot casting, steel ingot finishing, forging tube blank, tube rolling, cooling, heat treatment, and thermal spraying. The heat treatment is carried out in three steps : (1) The hot-rolled steel pipe is austenitized at 980°C, and then quenched to below 180°C; (2) The steel pipe after the first quenching is subjected to a second heat preservation treatment at 900°C, an...

Embodiment 2

[0023] A special-shaped steel pipe resistant to hydrogen sulfide corrosion, the chemical composition is as follows by weight percentage: carbon 0.25%, silicon 0.2%, manganese 1.2%, chromium 1.1%, molybdenum 0.7%, titanium 0.02%, phosphorus 0.01%, sulfur 0.003%, rhenium 0.12%, nitrogen 0.003%, aluminum 0.03%, rare earth 0.3%, nickel + vanadium + niobium 0.2%, and the rest is iron.

[0024] A method for preparing a special-shaped steel pipe resistant to hydrogen sulfide corrosion, comprising the steps of electric furnace smelting, ladle refining, steel ingot casting, steel ingot finishing, forging tube blank, tube rolling, cooling, heat treatment, and thermal spraying. The heat treatment is carried out in three steps : (1) The hot-rolled steel pipe is austenitized at 1000°C, and then quenched to below 180°C; (2) The steel pipe after the first quenching is subjected to a second heat preservation treatment at 920°C, and quenched to below 180°C; ( 3) Perform straightening treatment...

Embodiment 3

[0027] A special-shaped steel pipe resistant to hydrogen sulfide corrosion, the chemical composition is as follows by weight percentage: carbon 0.28%, silicon 0.26%, manganese 1.5%, chromium 1.2%, molybdenum 0.78%, titanium 0.02%, phosphorus 0.012%, sulfur 0.004%, rhenium 0.18%, nitrogen 0.004%, aluminum 0.05%, rare earth 0.5%, nickel + vanadium + niobium 0.28%, and the rest is iron. Wherein the rare earth is the rare earth element lanthanum.

[0028] A method for preparing a special-shaped steel pipe resistant to hydrogen sulfide corrosion, comprising the steps of electric furnace smelting, ladle refining, steel ingot casting, steel ingot finishing, forging tube blank, tube rolling, cooling, heat treatment, and thermal spraying. The heat treatment is carried out in three steps : (1) The hot-rolled steel pipe is austenitized at 1020°C, and then quenched to below 180°C; (2) The steel pipe after the first quenching is subjected to a second heat preservation treatment at 950°C, a...

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Abstract

The invention relates to the technical field of special-shaped steel pipes, in particular to a special-shaped steel pipe resistant to hydrogen sulfide corrosion and a preparation method thereof; the chemical composition is as follows by weight percentage: carbon 0.18%-0.28%, silicon 0.12%-0.26%, manganese 0.8%-1.5% %, chromium 0.95%-1.2%, molybdenum 0.62%-0.78%, titanium 0.01%-0.02%, phosphorus 0.008%-0.012%, sulfur 0.002%-0.004%, rhenium 0.06%-0.18%, nitrogen 0.002%-0.004% , aluminum 0.02%‑0.05%, rare earth 0.2%‑0.5%, nickel + vanadium + niobium 0.1%‑0.28%, and the rest is iron. The special-shaped steel pipe resistant to hydrogen sulfide corrosion of the invention has low cost, good structure stability and cold and hot workability.

Description

technical field [0001] The invention relates to the technical field of special-shaped steel pipes, in particular to a special-shaped steel pipe resistant to hydrogen sulfide corrosion and a preparation method thereof. Background technique [0002] Special-shaped steel pipe is a long strip of steel with a hollow section, widely used in automobiles, trains, airplanes, ships and space launchers and other structural components, mechanical parts, petrochemical, geological drilling, textile machinery, radio communications, medical and health, Completion and other fields. [0003] H of OCTG 2 The problem of S stress corrosion is a major issue faced by many oil fields at home and abroad in recent years. From the perspective of oil well pipe materials, ordinary oil well pipes obviously cannot meet the actual use requirements, especially in Sichuan oilfields and Changqing oilfields in my country. In some areas, as well as some oil fields in the United States and Canada, there is a la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/28C22C33/04C21D8/10
Inventor 段仲达
Owner 肇庆艾格特不锈钢制品有限公司
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