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Nickel-based alloy and preparation method and application thereof

A nickel-based alloy and alloy liquid technology, applied in the field of nickel-based alloys and their preparation, can solve problems such as poor corrosion resistance of supercritical equipment, achieve good oxidation resistance and thermal corrosion resistance, increase yield strength, and reduce stacking. The effect of stacking fault energy

Inactive Publication Date: 2015-09-02
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Nickel-based alloy and preparation method and application thereof

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preparation example Construction

[0054] The present invention also provides a method for preparing the above-mentioned nickel-based alloy, comprising the following steps:

[0055] Step 1, take Ni, Cr, W, Mo, Al, Ti, Fe, trace element respectively, wherein, in terms of mass fraction, the mass fraction of Cr is 15%-28%, and the mass fraction of W is 4.1%-10% %, the mass fraction of Mo is 0.5%-4%, the mass fraction of Al is 0.8%-2.1%, the mass fraction of Ti is 0.3%-0.8%, the mass fraction of Fe is 6%-17%, the mass fraction of trace elements The fraction is 0-0.5%, and the balance is Ni. The mass fraction of C introduced by Ni, Cr, W, Mo, Al, Ti, Fe, and trace elements is greater than 0 and less than or equal to 0.03%;

[0056] Step 2, Ni, Cr, W, Mo, Fe are mixed and melted under vacuum conditions until cleared to obtain molten metal liquid after clearing;

[0057] Step 3: Refining the melted molten metal after refining, and cooling down until the surface of the obtained refining liquid freezes conjunctiva;

...

Embodiment 1

[0068] The nickel-based alloy provided in this embodiment includes Ni, Cr, W, Mo, Al, Ti, Fe, and C introduced by Ni, Cr, W, Mo, Al, Ti, Fe; wherein, in mass fraction, The mass fraction of Cr in the nickel-based alloy is 19.3%, the mass fraction of W is 4.1%, the mass fraction of Mo is 0.7%, the mass fraction of Al is 1.5%, the mass fraction of Ti is 0.6%, and the mass fraction of Fe is 12.9% %, the mass fraction of C is greater than 0 and less than or equal to 0.03%, and the balance is Ni.

[0069] The preparation method of the nickel-based alloy provided in this embodiment comprises the following steps:

[0070] Step 1, take Ni, Cr, W, Mo, Al, Ti, Fe respectively, wherein, by mass fraction, the mass fraction of Cr is 19.3%, the mass fraction of W is 4.1%, and the mass fraction of Mo is 0.7% , the mass fraction of Al is 1.5%, the mass fraction of Ti is 0.6%, the mass fraction of Fe is 12.9%, and the balance is Ni; the mass of C introduced by Ni, Cr, W, Mo, Al, Ti, Fe The sc...

Embodiment 2

[0076] The nickel-based alloy provided in this embodiment includes Ni, Cr, W, Mo, Al, Ti, Fe, and C introduced by Ni, Cr, W, Mo, Al, Ti, Fe; wherein, in mass fraction, The mass fraction of Cr in the nickel-based alloy is 16.2%, the mass fraction of W is 9.0%, the mass fraction of Mo is 2.5%, the mass fraction of Al is 1.9%, the mass fraction of Ti is 0.5%, and the mass fraction of Fe is 17.0% %, the mass fraction of C is greater than 0 and less than or equal to 0.03%, and the balance is Ni.

[0077] The preparation method of the nickel-based alloy provided in this embodiment comprises the following steps:

[0078] Step 1, take Ni, Cr, W, Mo, Al, Ti, Fe respectively, wherein, by mass fraction, the mass fraction of Cr is 16.2%, the mass fraction of W is 9.0%, and the mass fraction of Mo is 2.5% , the mass fraction of Al is 1.9%, the mass fraction of Ti is 0.5%, the mass fraction of Fe is 17.0%, and the balance is Ni; the mass of C introduced by Ni, Cr, W, Mo, Al, Ti, Fe The sc...

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Abstract

The invention discloses a nickel-based alloy and a preparation method and an application thereof, and relates to the technical field of corrosion-resistant materials to solve the problem of poor corrosion resistance of supercritical equipment caused by an existing Inconel-625 material or Hastelloy C-276 material in an oxidative medium with a plurality of ions. The nickel-based alloy comprises the following elements in percentage by mass: 15%-28% of Cr, 4.1%-10% of W, 0.5%-4% of Mo, 0.8%-2.1% Al, 0.3-0.8 Ti, 6%-17% of Fe, greater than 0 and not greater than 0.03% of C, 0-0.5% of a microelement and the balance of Ni; and the preparation method of the nickel-based alloy comprises the following steps: mixing and melting Ni, Cr, Mo and Fe in a vacuum condition until completely melting, and then refining; adding Ti and the microelement, stirring evenly, and then desulfurizing at 1385-1395 DEG C; and finally casting and molding to obtain the nickel-based alloy. The nickel-based alloy can be applied to 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): C22C19/05C22C30/00
Inventor 刘扬程乐明
Owner ENN SCI & TECH DEV
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