A ultra -high -strength corrosion resistance alloy and manufacturing method

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: 2022-08-05
江苏汉青特种合金有限公司
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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

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  • A ultra -high -strength corrosion resistance alloy and manufacturing method
  • A ultra -high -strength corrosion resistance alloy and manufacturing method
  • A ultra -high -strength corrosion resistance alloy and manufacturing method

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Embodiment Construction

[0092] The development of the HQ9725 alloy in the present invention includes the optimal design of the chemical composition and the optimal 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 invention has a more optimized composition, and the designed Ti / Al ratio ranges from 4.0 to 6.0, and the best is 5.0, which further improves the strength of the alloy; bold and innovative design, adding Zr, the control range is 0.01 -0.08%, the best 0.02%, add Y, the control range is 0.01-0.08%, the best 0.02%, see Table 2 for details.

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

[0096]

[0097] In the following, the preferred solution of HQ9725 alloy is taken as an example to illustrate its specific manufacturing process, and based on this, the comprehensive performance is compared with the traditional GH4169 and Inco...

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Abstract

The invention belongs to the technical field of alloy manufacturing, and in particular relates to an ultra-high-strength corrosion-resistant alloy and a manufacturing method, in particular to a Cr-Ni-Mo-Nb corrosion-resistant alloy having both ultra-high strength and excellent stress corrosion properties and the Alloy production technology. The alloys of the present invention include the elements nickel, carbon, silicon, manganese, sulfur, chromium, molybdenum, iron, aluminum, titanium, niobium, zirconium, yttrium. The alloy prepared by the present invention is in high pressure H 2 S. High pressure CO 2 And in the chloride ion environment, it not only has very high strength, but also has excellent stress corrosion resistance, can be used to manufacture key components of oilfield drilling and production equipment, and has a long service life.

Description

technical field [0001] The invention belongs to the technical field of alloy manufacturing, and in particular relates to a Cr-Ni-Mo-Nb corrosion-resistant alloy with both ultra-high strength and excellent stress corrosion resistance and a production technology of the alloy. Background technique [0002] The application of steel in offshore oil engineering, marine ships, offshore engineering, seawater desalination, salt industry equipment, acid-resistant equipment, oil drilling and other scenarios are all faced with water-containing H 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 mature varieties 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 pressure CO 2 , In the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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