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Nickel-based alloy and preparation method and application thereof

A technology of nickel-based alloy and alloy liquid, applied in the field of nickel-based alloy and its preparation, can solve problems such as poor corrosion resistance of supercritical equipment, achieve good oxidation resistance and thermal corrosion resistance, and improve strength and strength.

Inactive Publication Date: 2015-08-26
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of nickel base alloy and its preparation method and application, to solve existing Inconel-625 material or Hastelloy C-276 material in the acidic oxidizing medium that multiple ions coexist, cause the resistance of supercritical equipment The problem of poor corrosion ability

Method used

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  • Nickel-based alloy and preparation method and application thereof

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preparation example Construction

[0058] The present invention also provides a method for preparing the above-mentioned nickel-based alloy, comprising the following steps:

[0059] Step 1, taking Ni, Cr, Mo, Fe, Ti, Cu and trace elements respectively, wherein, in terms of mass percentage, the mass fraction of Cr is 15%-28%, and the mass percentage of Mo is 4%-13%, The mass percentage of Ti is 0.5%-1.5%, the mass percentage of Cu is 1%-4%, the mass percentage of Fe is 6%-15%, and the mass percentage of trace elements is 0-0.5%; Ni, Cr, Mo, The mass percentage of C inevitably substituted in Fe, Ti, Cu and trace elements is greater than 0 and less than or equal to 0.03%, and the balance is Ni;

[0060] Step 2, Ni, Cr, Mo, Fe are mixed and melted under vacuum conditions until they are cleared, and the molten metal liquid after clearing is obtained;

[0061] Step 3: Refining the melted molten metal after refining, and cooling down until the surface of the obtained refining liquid freezes conjunctiva;

[0062] Ste...

Embodiment 1

[0072]The nickel-based alloy provided in this embodiment includes Ni, Cr, Mo, Ti, Cu, Fe, and C introduced by Ni, Cr, Mo, Ti, Cu, Fe; wherein, in terms of mass fraction, the nickel-based The mass fraction of Cr in the alloy is 16.8%, the mass fraction of Mo is 4.0%, the mass fraction of Ti is 0.8%, the mass fraction of Cu is 3.3%, the mass fraction of Fe is 7.9%, and the mass fraction of C is greater than 0 and less than Equal to 0.03%, the balance is Ni.

[0073] The preparation method of the nickel-based alloy provided in this embodiment comprises the following steps:

[0074] Step 1, take by weighing Ni, Cr, Mo, Fe, Ti, Cu respectively, wherein, by mass percentage, the mass fraction of Cr is 16.8%, the mass percentage of Mo is 4.0%, the mass percentage of Ti is 0.8%, Cu The mass percentage of Fe is 3.3%, the mass percentage of Fe is 7.9%, and the balance is Ni, and the mass percentage of C inevitably substituted in Ni, Cr, Mo, Fe, Ti, Cu is greater than 0 and less than or ...

Embodiment 2

[0080] The nickel-based alloy provided in this embodiment includes Ni, Cr, Mo, Ti, Cu, Fe, and C introduced by Ni, Cr, Mo, Ti, Cu, Fe; wherein, in terms of mass fraction, the nickel-based The mass fraction of Cr in the alloy is 17.5%, the mass fraction of Mo is 6.7%, the mass fraction of Ti is 1.1%, the mass fraction of Cu is 4.0%, the mass fraction of Fe is 13.3%, and the mass fraction of C is greater than 0 and less than Equal to 0.03%, the balance is Ni.

[0081] The preparation method of the nickel-based alloy provided in this embodiment comprises the following steps:

[0082] Step 1, take Ni, Cr, Mo, Fe, Ti, Cu respectively, wherein, by mass percent, the mass percent of Cr is 17.5%, the mass percent of Mo is 6.7%, the mass percent of Ti is 1.1%, Cu The mass percentage of Fe is 4.0%, the mass percentage of Fe is 13.3%, the mass percentage of C inevitably substituted in Ni, Cr, Mo, Fe, Ti, Cu is greater than 0 and less than or equal to 0.03%, and the balance is Ni;

[008...

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Abstract

The invention discloses nickel-based alloy and a preparation method and application thereof, and relates to the technical field of anti-corrosion materials. The nickel-based alloy and the preparation method and application thereof aim to solve the problem that an existing Inconel-625 material or a Hastelloy C-276 material causes poor corrosion resistance of supercritical equipment in an acidic oxidizing medium where various ions coexist. The nickel-based alloy comprises, by mass, 15-28% of Cr, 4-13% of Mo, 0.5-1.5% of Ti, 1-4% of Cu, 6-15% of Fe, 0-0.03% of C, 0-0.5% of microelements and the balance Ni. According to the preparation method of the nickel-based alloy, Ni, Cr, Mo and Fe are mixed and melted under a vacuum condition till being clarified, then refining is carried out, after refining is finished, Ti and the microelements are added and evenly stirred, desulfuration is carried out, and finally casting molding is carried out to obtain the nickel-based alloy. The nickel-based alloy can be used in the supercritical equipment as a corrosion-resistant material.

Description

technical field [0001] The invention relates to the technical field of corrosion-resistant materials, in particular to a nickel-based alloy and its preparation method and application. Background technique [0002] At present, with the emphasis on environmental protection in various countries, correspondingly higher requirements are put forward for the treatment of industrial wastewater and urban sewage. Supercritical water oxidation treatment technology uses supercritical water as a medium to decompose organic matter contained in wastewater or sewage into simple and non-toxic small molecular compounds such as water and carbon dioxide under high temperature and high pressure conditions. Because supercritical water oxidation treatment technology can remove almost 100% of the organic matter contained in wastewater or sewage, and the organic matter is completely oxidized in a fully enclosed state without secondary pollution. Therefore, this technology has been paid more and more...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C30/02C22C1/02C22C1/06C02F1/72
Inventor 刘扬程乐明
Owner ENN SCI & TECH DEV
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