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Preparation method for high-strength wear-resistant alloy Cu-15Ni-8Sn

A cu-15ni-8sn, wear-resistant alloy technology, applied in the field of alloy preparation, can solve the problems of difficulty in industrial promotion, complicated process, expensive equipment, etc., and achieve the effects of avoiding melt suction, low melting point, and low production cost

Active Publication Date: 2016-08-24
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rapid solidification method can minimize the segregation of tin and the spacing of dendrite segregation. The alloy prepared by this method has uniform composition and excellent performance. However, this method has problems such as complicated process and expensive equipment, so it is difficult to promote it in industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put 19.25 kg of electrolytic copper and 3.75 kg of pure nickel into a 30 kg intermediate frequency coreless induction furnace, open the furnace to raise the temperature, and then introduce nitrogen protective gas. The protective pressure of nitrogen is 1 atm. When the charge is basically melted, then add The roasted charcoal is covered with the melt. The thickness of the charcoal covering is 35 mm thick, which completely covers the melt to prevent the melt from inhaling during the smelting process. Continue to heat up to make the smelting temperature 1300°C, add 2 kg of industrial pure tin raw materials at 1300°C after holding for 65 minutes. However, due to the low melting point and volatility of tin, the actual addition is 125% of the calculated mass of tin. After 5 minutes of melting, add 125g of refining agent. The quality of the refining agent is: 60% borax + 40% glass, 125g of phosphor copper deoxidizer, 50g of grain refiner and 125g of modifier Ti and The modifier...

Embodiment 2

[0023] Put 19.25 kg of electrolytic copper into a 30 kg intermediate frequency coreless induction furnace, add 3.75 kg of nickel raw materials, open the furnace to increase the temperature, and then introduce nitrogen protective gas, the protective pressure of nitrogen is 1 atmosphere, when the charge is basically melted, then add The roasted charcoal is covered with the melt, and the thickness of the charcoal covering is about 20 mm, which completely covers the melt to prevent the melt from inhaling during the smelting process. Continue to heat up to make the smelting temperature 1350 ℃, add 2 kg of industrial pure tin raw materials at 1250 ℃ after 30 minutes of heat preservation, but due to the low melting point of tin and volatility, the actual addition is 125% of the calculated mass of tin. After melting for 10 minutes, add 375g of refining agent. The mass preparation ratio of the refining agent is: 33% fluorite + 42% calcium carbonate + 25% cryolite, 250g of phosphorous cop...

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Abstract

The invention discloses a preparation method for a high-strength wear-resistant alloy Cu-15Ni-8Sn. The process comprises the following steps: adding electrolytic copper and nickel; pouring the electrolytic copper and nickel in an intermediate-frequency coreless induction furnace; adding charcoal; charging nitrogen gas with one barometric pressure; melting; melting for 30-65 minutes at 1300-1350 DEG C; adding tin and melting at 1250-1300 DEG C; adding a refiner and a deoxidizer; stirring; adding a grain refiner; adding a modifier; slagging off; carrying out inspection before melting; carrying out electromagnetic casting after ingredients are qualified; cutting a head and a tail; scalping; carrying out ingredient inspection after melting; carrying out organization structure analysis; and carrying out performance detection. A Cu-15Ni-8SnC72900 alloy melt and cast by virtue of the intermediate-frequency coreless induction furnace, which is obtained by the preparation method disclosed by the invention, is low in production cost; and the developed products are high in quality. The developed products can be applied to national defense and military industry, ocean engineering and high-end preparation manufacturing industry; and the increasingly urgent needs of the national defense and military industry, ocean engineering and high-end preparation manufacturing industry on high-performance copper alloy materials are met.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, and in particular relates to a method for preparing a high-strength wear-resistant tin-nickel-nickel alloy Cu-15Ni-8Sn produced by an intermediate frequency melting furnace and an electromagnetic casting method. Background technique [0002] C72900 alloy is the grade in the American standard, and the Chinese grade is expressed as Cu-15Ni-8Sn. This alloy has high strength, high hardness, high elasticity, high toughness, high conductivity stability, excellent wear resistance and corrosion resistance. It has good stress relaxation resistance and the ability to maintain stable shape at high temperature, no deformation and little stress relaxation, and is gradually replacing the use of beryllium bronze. Domestically, C72900 alloy is mainly used in national defense military industry, ocean engineering, and high-end preparation manufacturing industry to solve the increasingly urgent demand for...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C9/06B22D27/02
CPCB22D27/02C22C1/02C22C9/06
Inventor 陈琴樊昱凌得魁郭廷彪赵堂昌张海峰赵文辉
Owner JINCHUAN GROUP LIMITED
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