Novel corrosion-resistant nickel-based alloy and production process thereof

A technology of nickel-based alloy and production process, which is applied in the field of new corrosion-resistant nickel-based alloy and its production process, can solve the problems of increased corrosion of heat exchangers, poor corrosion resistance of carbon steel, and easy corrosion, etc. The phase is uniform, the quality of the finished alloy is stable, and the effect of uniformity is good

Inactive Publication Date: 2019-10-08
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with stainless steel and alloy steel added with precious metals, carbon steel has poorer corrosion resistance and is prone to rust problems, which intensifies the corrosion of heat exchangers and causes huge economic losses

Method used

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  • Novel corrosion-resistant nickel-based alloy and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A new type of corrosion-resistant nickel-based alloy:

[0052] A new type of corrosion-resistant nickel-based alloy, the composition weight percent of which is: Cu: 31.5%, Al: 2.67%, Fe: 1.36%, Cr: 1.23%, Mn: 0.86%, Ti: 0.53%, Nb: 0.34%, Ta: 0.29%, Si: 0.31%, C: 0.046%, S: 0.002%, the balance is Ni;

[0053] The production process of novel corrosion-resistant nickel-based alloy comprises the following steps:

[0054] S10, select raw materials, the weight percent of raw materials is composed of: 31.5% pure copper, 2.67% electrolytic aluminum, 1.36% iron powder, 1.23% pure chromium, 0.86% electrolytic manganese, 0.53% pure titanium, 0.34% niobium, 0.29% tantalum, 0.31% pure silicon, 0.046% carbon powder, 0.002% sulfur, and the rest electrolytic nickel; put the raw materials into a vacuum intermediate frequency melting furnace for melting;

[0055] S20, raising the temperature in the vacuum melting furnace to 1580° C., and then keeping the temperature in the vacuum melti...

Embodiment 2

[0067] A novel corrosion-resistant nickel-based alloy and its production process:

[0068] A new type of corrosion-resistant nickel-based alloy, its composition weight percentage is: Cu: 29.5%, Al: 3.15%, Fe: 1.83%, Cr: 1.48%, Mn: 1.13%, Ti: 0.82%, Nb: 0.61%, Ta: 0.57%, Si: 0.44%, C: 0.085%, S: 0.005%, and the balance is Ni.

[0069] The production process of novel corrosion-resistant nickel-based alloy comprises the following steps:

[0070] S10, select raw materials, the weight percentage of raw materials is composed of: 29.5% pure copper, 3.15% electrolytic aluminum, 1.83% iron powder, 1.48% pure chromium, 1.13% electrolytic manganese, 0.82% pure titanium, 0.61% niobium, 0.57% tantalum, 0.44% pure silicon, 0.085% carbon powder, 0.005% sulfur, and the rest electrolytic nickel; put the raw materials into a vacuum intermediate frequency melting furnace for melting;

[0071] S20, raising the temperature in the vacuum melting furnace to 1630°C, and then keeping the temperature...

Embodiment 3

[0083] A new type of corrosion-resistant nickel-based alloy:

[0084] A new type of corrosion-resistant nickel-based alloy, the weight percentage of which is: Cu: 30.5%, Al: 3.27%, Fe: 1.64%, Cr: 1.37%, Mn: 0.93%, Ti: 0.69%, Nb: 0.51%, Ta: 0.46%, Si: 0.38%, C: 0.068%, S: 0.0035%, and the balance is Ni.

[0085] The production process of novel corrosion-resistant nickel-based alloy comprises the following steps:

[0086] S10, select raw materials, the weight percent of raw materials is composed of: 30.5% pure copper, 3.27% electrolytic aluminum, 1.64% iron powder, 1.37% pure chromium, 0.93% electrolytic manganese, 0.69% pure titanium, 0.51% niobium, 0.46% tantalum, 0.38% pure silicon, 0.068% carbon powder, 0.0035% sulfur, and the rest electrolytic nickel; put the raw materials into a vacuum intermediate frequency melting furnace for melting;

[0087] S20, raising the temperature in the vacuum melting furnace to 1600°C, and then keeping the temperature in the vacuum melting fu...

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Abstract

The invention discloses a novel corrosion-resistant nickel-based alloy and a production process thereof. The nickel-based alloy comprises the following components of, in percentage by weight, 29.5%-31.5% of Cu, 2.67%-3.45% of Al, 1.36%-1.83% of Fe, 1.23%-1.48% of Cr, 0.86%-1.13% of Mn, 0.53%-0.82% of Ti, 0.34%-0.61% of Nb, 0.29%-0.57% of Ta, 0.31%-0.44% of Si, 0.046%-0.085% of C, less than or equal to 0.005% of S, and the balance Ni. The novel corrosion-resistant nickel-based alloy has the obvious characteristics that the metal element Ni is a surface-centered cubic structure, has excellent crystallographic stability and can contain more alloy elements., the thermodynamic stability of the alloy is remarkably improved after the alloy elements Cu and Cr are added, the Cr, Nb, Ta and other metal elements can be oxidized on the surface of the alloy to form a compact passivation film, so that the corrosion resistance of the alloy material can be remarkably increased; and metal elements suchas Al, Ti, Fe, Mn and the like as well as non-metallic elements such as Si, C and S are added, so that the comprehensive mechanical property of the alloy material is remarkably improved. In addition,the nickel-based alloy is prepared by adopting a production process of solid-melt aging, the alloy metallographic phase is uniform and consistent, and the quality of the alloy finished product is stable.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a novel corrosion-resistant nickel-based alloy and a production process thereof. Background technique [0002] The marine heat exchanger is an important equipment of the marine turbine, which is used to realize the heat exchange between the internal and external media of the heat exchanger. Heat exchangers have a wide range of uses, and are used in central coolers, jacket water coolers, engine coolers, main engine coolers, circulating water coolers, seawater preheaters, waste heat recovery devices, and seawater desalination main engines. use. For ships operating in the marine environment, due to the convenience and low cost of seawater, seawater is usually used as the heat exchange fluid medium for marine heat exchangers. However, due to the strong corrosiveness of seawater, the corrosion problem of heat exchangers is particularly prominent. Problems such as blockage an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02C22F1/10
CPCC22C1/023C22C19/058C22F1/10
Inventor 豆照良刘峰斌
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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