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High-strength copper-nickel alloy and preparation process thereof

A copper-nickel alloy and preparation process technology, applied in the field of materials engineering, can solve the problems of low strength of copper-nickel alloy, limited cavitation resistance, etc., to achieve improved cavitation resistance and electrochemical corrosion resistance, low noise, The effect of noise level reduction

Active Publication Date: 2012-08-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of the existing copper-nickel alloy is not high, which limits the improvement of its cavitation resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A process for preparing a high-strength copper-nickel alloy. First, the total weight percentage of raw materials: 31% Ni, 1% Mn, 1% Fe, 0.1% Ag, 3% Mo and 59.25% Cu are smelted at an intermediate frequency Smelting in the furnace at 1520 ℃, copper-magnesium alloy with magnesium content of 20% is used as degassing agent, and plant ash is used as covering agent. After reaching 1380°C, add 4% of Al, 0.6% of Ti and 0.05% of rare earth Ce in sequence; when the temperature reaches 1360°C, pour the alloy melt into the cast iron mold and cool it to room temperature. ; Finally, the alloy obtained by casting is kept in a heat treatment furnace at 900° C. for 5 hours, and is subjected to solid solution treatment to obtain a copper-nickel alloy.

[0012] The percentage by weight of the cupronickel alloy prepared according to the preparation process of this example is: 28% Ni, 0.8% Fe, 0.8% Mn, 2% Al, 1% Mo, 0.3% Ti, 0.08% Ag, 0.01% Ce and 67.01% Cu.

Embodiment 2

[0014] A process for preparing a high-strength copper-nickel alloy. First, the total weight percentage of raw materials: 31% Ni, 1.2% Mn, 1.2% Fe, 0.12% Ag, 3% Mo and 57.83% Cu are smelted at an intermediate frequency Smelting in the furnace at 1480 ℃, copper-magnesium alloy with magnesium content of 20% is used as degassing agent, and plant ash is used as covering agent. After reaching 1380°C, add 5% of Al, 0.6% of Ti and 0.05% of rare earth Ce in sequence; when the temperature reaches 1280°C, pour the alloy melt into the cast iron mold and cool it to room temperature. ; Finally, the alloy obtained by casting is kept in a heat treatment furnace at 950° C. for 5 hours, and then solid solution treatment is performed to obtain a copper-nickel alloy.

[0015] The percentage by weight of cupronickel alloy prepared according to the preparation process of this example is: 29.2% Ni, 0.94% Fe, 1% Mn, 2.8% Al, 2% Mo, 0.45% Ti, 0.1% Ag, 0.01% Ce and 63.5% Cu.

Embodiment 3

[0017] A high-strength copper-nickel alloy preparation process, firstly, the total weight percentage of raw materials is: 30% Ni, 1% Mn, 1% Fe, 0.08% Ag, 2.5% Mo and 60.87% Cu are smelted at an intermediate frequency Smelting in the furnace at 1490 ℃, copper-magnesium alloy with magnesium content of 20% is used as degassing agent, and plant ash is used as covering agent. After reaching 1380°C, add 4% of Al, 0.5% of Ti and 0.05% of rare earth Ce in sequence; when the temperature reaches 1320°C, pour the alloy melt into the cast iron mold and cool it to room temperature. ; Finally, the alloy obtained by casting is kept in a heat treatment furnace at 890° C. for 5 hours, and is subjected to solid solution treatment to obtain a copper-nickel alloy.

[0018] The percentage by weight of the cupronickel alloy prepared according to the preparation process of this embodiment is: 29.5% Ni, 0.96% Fe, 0.9% Mn, 2.88% Al, 2% Mo, 0.45% Ti, 0.12% Ag, 0.03% Ce and 63.16% Cu.

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Abstract

The invention discloses a high-strength copper-nickel alloy and a preparation process thereof. The preparation process comprises the following steps: smelting 28-35% of Ni, 0.8-1.5% of Mn, 0.8-1.5% of Fe, 0.2-0.7% of Ag, 2-5% of Mo and 58-65% of Cu in sequence; adding 2-5% of total mass of Al, 0.3-0.6% of Ti, 0.05% of rare earth Ce; continuously cooling; injecting an alloy solution into a cast iron mould when the temperature achieves 1280-1360 DEG C; cooling; heat treating, preserving the temperature in the furnace and carrying out solution treatment to obtain the copper-nickel alloy which comprises the following components by weight percent: 28-31% of Ni, 0.8-1.2% of Fe, 0.8-1.2% of Mn, 2-5% of Al, 1-3% of Mo, 0.3-0.6% of Ti, 0.08-0.12% of Ag, 0.01-0.05% of Ce, 57.83-67.01% of Cu. The copper-nickel alloy is high in strength and toughness and has 2-3 times of tensile strength and yield strength than the tensile strength and the yield strength of B30 copper-nickel alloy.

Description

technical field [0001] The invention relates to material engineering, in particular to a high-strength copper-nickel alloy and a preparation process thereof. Background technique [0002] Cavitation is a hydraulic phenomenon with very serious destructive force. It occurs because the microbubbles in the liquid collapse and form high-speed microjets that impact the wall, thereby causing serious damage to the solid wall material. Cavitation is the main damage form that causes the failure of major energy equipment such as water turbines, steam turbines, and wind turbines. At the same time, the noise generated in the process of cavitation is a major factor that seriously restricts the improvement of combat performance of ships, submarines, and torpedoes and other underwater weapons. . Copper-nickel alloys have excellent seawater corrosion resistance, and are often used in the manufacture of key parts of pipelines on ships, blade materials for seawater pumps, and the manufacture ...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22C1/02C22F1/08
Inventor 李党国陈大融汪家道
Owner TSINGHUA UNIV
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