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Preparation method of high-strength high-elasticity wear-resistant CuNiSn alloy material through vacuum induction melting

A technology of vacuum induction melting and alloy materials, applied in metal material coating process, fusion spraying, coating, etc., can solve the problems of complex preparation process, serious surface oxidation, high expansion coefficient, etc., and achieve reasonable material composition, The effect of low production cost and high degree of alloying

Pending Publication Date: 2022-04-22
SIRUI ADVANCED COPPER ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing CuNiSn materials can be divided into: Cu-4Ni-4Sn, Cu-7.5Ni-5Sn, Cu-9Ni-6Sn, Cu-10Ni-8Sn, Cu-15Ni-8Sn according to different Ni and Sn element contents. High-end CuNiSn alloys are all imported. At present, the preparation process of CuNiSn materials is complicated, the cost is extremely high, the defect density is high, the brittleness is high, the surface oxidation is serious, the expansion coefficient is high, easy to be damaged, and the wear resistance is poor.

Method used

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  • Preparation method of high-strength high-elasticity wear-resistant CuNiSn alloy material through vacuum induction melting
  • Preparation method of high-strength high-elasticity wear-resistant CuNiSn alloy material through vacuum induction melting
  • Preparation method of high-strength high-elasticity wear-resistant CuNiSn alloy material through vacuum induction melting

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Effect test

Embodiment 1

[0033] A method for preparing a vacuum induction melting high-strength, high-elasticity and wear-resistant CuNiSn alloy material, comprising the following steps:

[0034] (1) Ingredients: In terms of mass percentage, the percentage content of each element is: Ni: 5%, Sn: 5%, Fe: 0.01%, Al: 0.5%, Si: 0.3%, Cu is the balance: 89.19% ;

[0035] (2) Furnace loading: use one-time feeding method, put the prepared alloy material into the graphite crucible, close the furnace cover, close the vent valve, and clean the observation window;

[0036] (3) Vacuuming: Turn on the mechanical pump, open the low vacuum baffle valve and evacuate, and when the vacuum pressure P in the furnace is 0.08MPa, turn on the Roots pump;

[0037] (4) Melting: When vacuuming until P is 10Pa, heat intermittently to 1250°C. After the raw materials in the crucible start to melt, reduce the power of the equipment, open the argon filling valve, and slowly fill the furnace with high-purity argon. When the intern...

Embodiment 2

[0041] A method for preparing a vacuum induction melting high-strength, high-elasticity and wear-resistant CuNiSn alloy material, comprising the following steps:

[0042] (1) Ingredients: by mass percentage, the percentage content of each element is: Ni: 6%, Sn: 6%, Fe: 0.02%, Al: 1%, Si: 0.5%, Cu: 86.48%;

[0043] (2) Furnace loading: use one-time feeding method, put the prepared alloy material into the graphite crucible, close the furnace cover, close the vent valve, and clean the observation window;

[0044] (3) Vacuuming: Turn on the mechanical pump, open the low vacuum baffle valve and evacuate, and when the vacuum pressure P in the furnace is 0.07MPa, turn on the Roots pump;

[0045] (4) Melting: When vacuuming until P is 9Pa, heat intermittently to 1350°C. After the raw materials in the crucible start to melt, reduce the power of the equipment, open the argon filling valve, and slowly fill the furnace with high-purity argon. When the internal pressure rises to -0.08Mpa, ...

Embodiment 3

[0049] A method for preparing a vacuum induction melting high-strength, high-elasticity and wear-resistant CuNiSn alloy material, comprising the following steps:

[0050] (1) Ingredients: by mass percentage, the percentage content of each element is: Ni: 7%, Sn: 7%, Fe: 0.03%, Al: 2%, Si: 0.7%, Cu: 83.27%;

[0051] (2) Furnace loading: use one-time feeding method, put the prepared alloy material into the graphite crucible, close the furnace cover, close the vent valve, and clean the observation window;

[0052] (3) Vacuuming: Turn on the mechanical pump, open the low vacuum baffle valve and evacuate, and when the vacuum pressure P in the furnace is 0.086MPa, turn on the Roots pump;

[0053] (4) Melting: When vacuuming until P is 8Pa, heat intermittently to 1450°C. After the raw materials in the crucible start to melt, reduce the power of the equipment, open the argon filling valve, and slowly fill the furnace with high-purity argon. When the internal pressure rises to -0.08Mp...

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Abstract

The invention provides a preparation method of a high-strength high-elasticity wear-resistant CuNiSn alloy material through vacuum induction melting, and belongs to the technical field of non-ferrous metal alloy preparation. Comprising the following steps: (1) burdening; (2) charging; (3) vacuumizing; (4) smelting; (5) casting; (6) discharging; the CuNiSn alloy is prepared by adopting a vacuum induction melting method, the material composition is reasonable, the structure is uniform, the alloying degree is high, no obvious structure defect exists, no impurity exists, and after a small amount of Fe, Si and Al is added, the material strength is improved, the wear resistance is improved, grains are refined, and no reverse segregation of Sn exists in the structure; the nano carbon sphere micro-arc oxidation coating is sprayed on the surface of the CuNiSn alloy, so that the strength of the alloy is improved, the friction coefficient is obviously reduced, and the wear resistance of the alloy is obviously improved; the negative thermal expansion material is added into the alloy liquid, so that the expansion coefficient of the CuNiSn alloy material can be reduced, the defects of shrinkage porosity and shrinkage cavity are not easy to generate during casting, and the alloy has no obvious structure defect.

Description

technical field [0001] The invention belongs to the technical field of preparation of nonferrous metal alloys, in particular to a preparation method of vacuum induction melting high-strength, high-elasticity and wear-resistant CuNiSn alloy material. Background technique [0002] Due to its excellent electrical conductivity, thermal conductivity, elasticity, wear resistance and other properties, high-strength and high-elastic copper alloys are widely prepared into plates, strips, rods, wires, etc., which are used in various high-end precision connectors, switches, contacts Springs, terminal elements and converters, etc. At present, the most widely used high-strength and high-elastic material is beryllium copper. In recent years, the amount and output of beryllium copper materials in various countries have been increasing, but Be element is toxic, and the processing and production process of beryllium bronze is harmful to human body and environment. The process is complicated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C9/00C22C9/02C23C4/131C23C4/04
CPCC22C1/03C22C9/00C22C9/02C23C4/131C23C4/04
Inventor 贺猛孙君鹏田东松王群郭创立
Owner SIRUI ADVANCED COPPER ALLOY CO LTD
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