A nickel-copper alloy with excellent low-temperature impact properties and its production process

A nickel-copper alloy, low-temperature impact technology, applied in the field of alloy materials, can solve problems such as unreasonable element composition, poor low-temperature impact performance, and unsatisfactory toughness requirements, and achieve quantitative dispersion, low-temperature impact performance improvement, and comprehensive mechanical properties. Effect

Active Publication Date: 2017-12-22
上海纳微涂层有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unreasonable element composition and defects in the production process of the existing nickel-copper alloy used for the shaft material of the cryogenic pump, the low-temperature impact performance of the existing nickel-copper alloy used for the shaft material of the cryogenic pump is not good, and the toughness cannot meet the requirements.

Method used

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  • A nickel-copper alloy with excellent low-temperature impact properties and its production process
  • A nickel-copper alloy with excellent low-temperature impact properties and its production process
  • A nickel-copper alloy with excellent low-temperature impact properties and its production process

Examples

Experimental program
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Effect test

Embodiment 1

[0044] This embodiment provides a nickel-copper alloy, its composition weight percent is: Cu: 30.5%, Al: 2.88%, Ti: 0.47%, Mn: 1.18%, Si: 0.35%, C: 0.06%, S: 0.002 %; the balance is Ni.

[0045] The production technology of this nickel-copper alloy comprises the following steps:

[0046] Get the raw material, the weight percentage of the raw material is composed of: 31% Cu, 3% electrolytic aluminum, 0.5% pure titanium, 1.2% electrolytic manganese, 0.37% pure silicon, 0.07% carbon powder, and the remaining electrolytic nickel ;The raw material is smelted in a vacuum intermediate frequency melting furnace at 1550-1650°C to produce a melt, and a small amount of magnesium copper is added as a degasser during the smelting process;

[0047] The melt is refined at 1600°C for 45 minutes;

[0048] Stand still at 1550°C for 30 minutes after refining;

[0049] After cooling down to 1520°C, pour it into a cast iron mold and cool to room temperature to obtain an ingot;

[0050] Carry o...

Embodiment 2

[0054] This embodiment provides a nickel-copper alloy, its composition weight percent is: Cu: 32.5%, Al: 3.2%, Ti: 0.6%, Mn: 1.28%, Si: 0.38%, C: 0.085%, S: 0.001 %; the balance is Ni.

[0055] The production technology of this nickel-copper alloy comprises the following steps:

[0056] Get the raw material, the weight percentage of the raw material is composed of: 33% Cu, 3.5% electrolytic aluminum, 0.7% pure titanium, 1.3% electrolytic manganese, 0.4% pure silicon, 0.1% carbon powder, and the remaining electrolytic nickel ;The raw material is smelted in a vacuum intermediate frequency melting furnace at 1580-1650°C to produce a melt, and a small amount of magnesium copper is added as a degasser during the smelting process;

[0057] The melt is refined at 1600°C for 45 minutes;

[0058] Stand still at 1550°C for 30 minutes after refining;

[0059] After cooling down to 1520°C, pour it into a cast iron mold and cool to room temperature to obtain an ingot;

[0060] Carry ou...

Embodiment 3

[0064] This embodiment provides a nickel-copper alloy, its composition weight percent is: Cu: 28.5%, Al: 2.74%, Ti: 0.52%, Mn: 1.18%, Si: 0.33%, C: 0.057%, S: 0.002 %; the balance is Ni.

[0065] The production technology of this nickel-copper alloy comprises the following steps:

[0066] Get the raw material, the weight percentage of the raw material is composed of: 29% Cu, 2.9% electrolytic aluminum, 0.6% pure titanium, 1.2% electrolytic manganese, 0.35% pure silicon, 0.07% carbon powder, and the remaining electrolytic nickel ;The raw material is smelted in a vacuum intermediate frequency melting furnace at 1500-1600°C to produce a melt, and a small amount of magnesium copper is added as a degasser during the smelting process;

[0067] The melt is refined at 1580°C for 40 minutes;

[0068] Stand still at 1530°C for 30 minutes after refining;

[0069] After cooling down to 1500°C, pour it into a cast iron mold and cool to room temperature to obtain an ingot;

[0070] Carr...

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Abstract

The invention relates to the technical field of alloy materials, particularly discloses a nickel-copper alloy good in low-temperature impact performance and meanwhile discloses a production technology of the nickel-copper alloy. The nickel-copper alloy comprises, by weight percentage, 28.5-32.5% of Cu, 2.74-3.2% of Al, 0.47-0.6% of Ti, 1.18-1.28% of Mn, 0.33-0.38% of Si, 0.057-0.085% of C, smaller than or equal to 0.002% of S and the balance Ni. The low-temperature impact work of the nickel-copper alloy is far higher than that of an existing nickel-copper alloy material, and it is shown by low-temperature using conditions in a practical using environment that the low-temperature impact resistance capability of the nickel-copper alloy is very high; meanwhile, the comprehensive mechanical performance of the nickel-copper alloy is very good and is far superior than that of the existing nickel-copper alloy material; and the service life of a low-temperature pump is greatly prolonged when an LNG low-temperature pump shaft made of the nickel-copper alloy replacing a nickel-copper alloy of the same kind is used.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a nickel-copper alloy with excellent low-temperature impact performance, and also to its production process. Background technique [0002] Natural gas is becoming more and more popular as a clean energy source, and many countries have listed LNG (liquefied natural gas) as the preferred fuel. The proportion of natural gas in energy supply is increasing rapidly, and liquefied natural gas is growing at a high rate of about 12% per year, becoming one of the fastest growing energy industries in the world. In recent years, global LNG production and trade have become increasingly active. LNG has become a scarce and clean resource and is becoming a new hot spot in the world's oil and gas industry. In order to ensure the diversification of energy supply and improve the energy consumption structure, some major energy consuming countries are paying more and more attention to the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22F1/10C22C1/02
CPCC22C1/023C22C19/03C22F1/10
Inventor 豆照良唐啸鸣
Owner 上海纳微涂层有限公司
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