Method for manufacturing nickel-copper alloy valve body for precision casting

A nickel-copper alloy and precision casting technology, which is applied in the field of precision casting nickel-copper alloy valve body, can solve the problems of many internal defects and poor compactness of the nickel-copper alloy valve body, so as to reduce internal defects, improve compactness, fineness, etc. The effect of grain

Active Publication Date: 2013-12-25
苏州华宇精密铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a production process for making nickel-copper alloy valve bodies that solves the problems of many internal def

Method used

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Comparison scheme
Effect test

Embodiment 1

[0015] A method for preparing a precision casting nickel-copper alloy valve body is provided, which is characterized in that the weight percent of the chemical composition of the alloy is: Ni 16%, Al 3.5%, Mg 8.5%, Sn 0.035%, Sb 0.05%, Ca 0.015%, Bi 0.035%, Ti 0.015%, Mn 0.015%, Y 0.025%, Mo 0.035%, the balance is copper and unavoidable non-metallic inclusions,

[0016] The preparation method of the nickel-copper alloy valve body includes the following steps: batching according to the chemical composition requirements of the above-mentioned nickel-copper alloy; first adding pure copper ingots, adding nickel-aluminum alloy after the pure copper ingots are melted, and finally adding other alloying elements, smelting The temperature is 1385°C, pouring: the casting temperature is 1365°C, and then the demoulding is carried out, and the obtained nickel-copper alloy valve body is kept at 870°C for 130 minutes, and then quenched at this temperature; the cooling rate is greater than 30°...

Embodiment 2

[0019] A method for preparing a precision casting nickel-copper alloy valve body is provided, which is characterized in that the weight percent of the chemical composition of the alloy is: Ni 15.5%, Al 3.2%, Mg 8.2%, Sn 0.032%, Sb 0.032%, Ca 0.012%, Bi 0.032%, Ti 0.012%, Mn 0.012%, Y 0.022%, Mo 0.032%, the balance is copper and unavoidable non-metallic inclusions,

[0020] The preparation method of the nickel-copper alloy valve body includes the following steps: batching according to the chemical composition requirements of the above-mentioned nickel-copper alloy; first adding pure copper ingots, adding nickel-aluminum alloy after the pure copper ingots are melted, and finally adding other alloying elements, smelting The temperature is 1380°C, pouring: the casting temperature is 1360°C, and then the demoulding is carried out, and the obtained nickel-copper alloy valve body is kept at 860°C for 120-150 minutes, and then quenched at this temperature; the cooling rate is greater t...

Embodiment 3

[0023] A method for preparing a precision casting nickel-copper alloy valve body is provided, which is characterized in that the weight percent of the chemical composition of the alloy is: Ni 15.4%, Al 3.4%, Mg 8.4%, Sn 0.034%, Sb 0.034%, Ca 0.014%, Bi 0.034%, Ti 0.014%, Mn 0.014%, Y 0.024%, Mo 0.034%, the balance is copper and unavoidable non-metallic inclusions,

[0024] The preparation method of the nickel-copper alloy valve body includes the following steps: batching according to the chemical composition requirements of the above-mentioned nickel-copper alloy; first adding pure copper ingots, adding nickel-aluminum alloy after the pure copper ingots are melted, and finally adding other alloying elements, smelting The temperature is 1390°C, pouring: the casting temperature is 1370°C, and then the demoulding is carried out, and the obtained nickel-copper alloy valve body is kept at 880°C for 150 minutes, and then quenched at this temperature; the cooling rate is greater than ...

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Abstract

The invention discloses a method for manufacturing a nickel-copper alloy valve body for precision casting. The valve body is characterized by comprising the following chemical components in percentage by weight: 15-17 percent of Ni, 3-4 percent of Al, 8-9 percent of Mg, 0.03-0.04 percent of Sn, 0.03-0.04 percent of Sb, 0.01-0.02 percent of Ca, 0.03-0.04 percent of Bi, 0.01-0.02 percent of Ti, 0.01-0.02 percent of Mn, 0.02-0.03 percent of Y, 0.03-0.04 percent of Mo, and the balance of copper and inevitable non-metal impurities. According to the method, a precision casting and shot blasting technology is adopted, so that the compactness of the valve body can be improved, the process can be simplified, the production efficiency can be improved, and the production cost can be reduced.

Description

technical field [0001] The invention relates to a method for preparing a precision casting nickel-copper alloy valve body, belonging to the field of copper-based alloy manufacturing. Background technique [0002] Nickel-copper alloy has been widely used in the field of valve body manufacturing due to its good mechanical properties, wear resistance, corrosion resistance, etc., but in view of the poor thermal processing performance of nickel-copper alloy, the forming of nickel-copper alloy rod The method is mainly casting, but the cast nickel-copper alloy has many internal defects and poor compactness, and it is prone to leakage and other problems after long-term use, which makes the reliability, yield, service life and material utilization of the cast nickel-copper alloy etc. are all limited; and the preparation of nickel-copper alloys in the prior art requires repeated pressure processing and homogenization annealing, and its processing technology is complicated, resulting i...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22C1/02C22F1/08
Inventor 王强
Owner 苏州华宇精密铸造有限公司
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