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Ultrahigh-strength corrosion-resistant alloy and manufacturing method thereof

A corrosion-resistant alloy and ultra-high-strength technology, applied in the field of alloy manufacturing, can solve problems such as short service life, insufficient strength index, and insufficient stress corrosion resistance

Active Publication Date: 2021-07-09
江苏汉青特种合金有限公司
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  • Application Information

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Problems solved by technology

[0028] In order to achieve the above purpose, the present invention strives to propose an ultra-high-strength corrosion-resistant alloy with significantly improved service life in the above-mentioned environment, fundamentally solving the problem of GH4169 and Inconel 625 due to resistance Insufficient stress corrosion resistance or short service life due to insufficient strength indicators

Method used

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  • Ultrahigh-strength corrosion-resistant alloy and manufacturing method thereof
  • Ultrahigh-strength corrosion-resistant alloy and manufacturing method thereof
  • Ultrahigh-strength corrosion-resistant alloy and manufacturing method thereof

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Embodiment Construction

[0092] The invention develops the HQ9725 alloy including the optimization design of the chemical composition and the optimization design of the production process route.

[0093] 1. Chemical composition design of HQ9725 alloy

[0094] Compared with the traditional GH4169 and Inconel 625 alloys, the HQ9725 alloy produced by the present invention has more optimized components, and the design Ti / Al ratio ranges from 4.0 to 6.0, the best being 5.0, which further improves the strength of the alloy; boldly innovative design, adding Zr, and the control range is 0.01 -0.08%, best 0.02%, add Y, control range 0.01-0.08%, best 0.02%, see Table 2 for details.

[0095] Table 2 Composition design comparison (percentage, %)

[0096]

[0097] In the following, the preferred scheme of HQ9725 alloy is taken as an example to illustrate its specific manufacturing process, and based on this, the comprehensive performance comparison with traditional GH4169 and Inconel 625 alloys is carried out....

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Abstract

The invention belongs to the technical field of alloy manufacturing, and particularly relates to an ultrahigh-strength corrosion-resistant alloy and a manufacturing method thereof, in particular to a Cr-Ni-Mo-Nb corrosion-resistant alloy with ultrahigh strength and excellent stress corrosion resistance and a production technology of the alloy. The alloy comprises the elements of nickel, carbon, silicon, manganese, sulfur, chromium, molybdenum, iron, aluminum, titanium, niobium, zirconium and yttrium. The alloy prepared by the invention has very high strength and excellent stress corrosion resistance in the environments of high-pressure H2S, high-pressure CO2 and chloride ions, can be used for manufacturing key parts of oil field drilling and production equipment, and is long in service life.

Description

technical field [0001] The invention belongs to the technical field of alloy manufacture, and in particular relates to a Cr-Ni-Mo-Nb corrosion-resistant alloy with ultra-high strength and excellent stress corrosion performance and the production technology of the alloy. Background technique [0002] The application of steel materials in offshore oil engineering, marine vessels, offshore engineering, seawater desalination, salt industry equipment, acid-resistant equipment, oil drilling and other scenarios is faced with the 2 S, chloride ion, high pressure CO 2 , oxygen-enriched environment, processing residual stress, external stress and other environmental influences, there is a tendency or result of stress corrosion cracking. For this reason, some varieties with relatively mature applications have been developed at home and abroad, such as GH4169, Inconel 625 and so on. [0003] But there are still some problems, such as GH4169 due to the high pressure H 2 S, high pressu...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C1/03C22B9/18C22F1/10
CPCC22C19/055C22C1/023C22C1/03C22B9/18C22F1/10
Inventor 陈刚
Owner 江苏汉青特种合金有限公司
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