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Rare earth oxide modified copper-nickel-silicon alloy material and preparation method and application thereof

A rare earth oxide, copper-nickel-silicon technology, applied in the field of rare earth oxide modified copper-nickel-silicon alloy and its preparation, can solve the problems of rare earth application, low plasticity, cracking, etc.

Inactive Publication Date: 2016-10-12
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of realizing the present invention, the inventors found that the strontium lanthanum manganate used in the present invention is a kind of perovskite rare earth oxide, which is currently widely used in magnetic sensors or heating elements, but its application in metal materials but rarely reported
Moreover, when rare earths or intermediate alloys are used to smelt alloys, they often only pay attention to the improvement of their strength, hardness, and electrical conductivity, while ignoring the influence of rare earths on the plasticity and toughness of the alloy.
Copper-nickel-silicon alloy has high strength in the as-cast condition, but its plasticity is low, and cracking often occurs in the subsequent extrusion or rolling process, which increases the scrap rate and increases the production cost

Method used

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  • Rare earth oxide modified copper-nickel-silicon alloy material and preparation method and application thereof
  • Rare earth oxide modified copper-nickel-silicon alloy material and preparation method and application thereof
  • Rare earth oxide modified copper-nickel-silicon alloy material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0038] A rare earth oxide modified copper-nickel-silicon alloy, the raw material components are: copper 95.8%, nickel 3.8%, silicon 0.3%, strontium lanthanum manganate 0.03% (atomic percentage: strontium 0.28, lanthanum 0.58).

[0039] Melting method:

[0040] (1) Grind the oxide skin of raw materials such as copper, nickel and silicon with a grinder, and preheat the crucible and casting mold.

[0041] (2) Medium frequency induction melting is adopted. In order to prevent the oxidation of copper alloy, the melting process is carried out under the protection of argon gas.

[0042] (3) Continue to heat after the alloy is completely melted. When the temperature of the melt rises to about 1250°C, rare earth oxides are added, and the power is reduced for 15 minutes.

[0043] (4) When the molten metal temperature drops to about 1200°C, the molten metal is poured into the mold.

Embodiment 2

[0045] A copper-nickel-silicon alloy modified by rare earth oxides. The raw material components are: copper 95.6%, nickel 1.3%, silicon 1.9%, strontium lanthanum manganate 1.0% (atomic percentage: strontium 0.1, lanthanum 0.59)

[0046] Smelting method:

[0047] (1) Use a grinder to grind the scale of raw materials such as copper, nickel and silicon, and preheat the crucible and the casting mold.

[0048] (2) Medium frequency induction melting is adopted. In order to prevent the oxidation of copper alloy, the melting process is carried out under the protection of argon gas.

[0049] (3) Continue heating after the alloy is completely melted. When the temperature of the melt rises to about 1300°C, add rare earth oxides and reduce the power for 30 minutes.

[0050] (4) When the melt temperature drops to about 1250°C, pour the melt into the mold.

Embodiment 3

[0052] A rare earth oxide modified copper-nickel-silicon alloy, the raw material components are: 93.2% copper, 3.9% nickel, 2.0% silicon, 0.9% strontium lanthanum manganate (atomic percentage: strontium 0.29, lanthanum 0.1).

[0053] Smelting method:

[0054] (1) Use a grinder to grind the scale of raw materials such as copper, nickel and silicon, and preheat the crucible and the casting mold.

[0055] (2) Medium frequency induction melting is adopted. In order to prevent the oxidation of copper alloy, the melting process is carried out under the protection of argon gas.

[0056] (3) Continue heating after the alloy is completely melted. When the temperature of the melt rises to about 1300°C, add rare earth oxides and reduce the power for 30 minutes.

[0057] (4) When the melt temperature drops to about 1250°C, pour the melt into the mold.

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Abstract

The invention belongs to the technical field of high-performance copper alloy materials, and discloses a rare earth oxide modified copper-nickel-silicon alloy material and a preparation method and application thereof. All the components include, by weight percentage, 1.1%-4.1% of nickel, 0.1%-2.1% of silicon, 0.01%-1.2% of rare earth oxide, and the balance copper and unavoidable impurities, wherein the rare earth oxide is strontium lanthanum manganese oxide (the atomic ratio of strontium is 0.01-0.29, and the atomic ratio of lanthanum is 0.01-0.59), and a vacuum induction smelting method is adopted. Part of the rare earth oxide in the rare earth oxide modified copper-nickel-silicon alloy material focuses in front of a solid-liquid interface, constitutional supercooling is caused, the cast structure is refined, and the dendrite arm spacing is reduced. Part of fine rare earth oxide particles enter grains to serve as heterogeneous nucleation points, and formation of isometric crystal is promoted. The rare earth oxide has a doping effect, thereby playing a role as modificator and affecting the separating-out number and distribution of a second phase. Finally, on the premise of guaranteeing the tensile strength of the cast alloy, the elongation is greatly improved, and the cast alloy has good plasticity.

Description

technical field [0001] The invention belongs to the technical field of high-performance copper alloy materials, in particular to a rare earth oxide modified copper-nickel-silicon alloy and a preparation method and application thereof. Background technique [0002] Cu-Ni-Si alloy is a precipitation-strengthened alloy with high strength and medium conductivity after aging. Because it does not contain toxic elements such as Co and Be, and has low cost, it is widely used in generator rotor wedges. Different from pure copper materials, as-cast Cu-Ni-Si alloys have high tensile strength but insufficient toughness, and cracking often occurs during ingot rolling or extrusion. [0003] Rare earths are often called "vitamins" of metal materials. Because of their active chemical properties, adding trace amounts of rare earth elements can significantly improve the performance of materials. At present, the preparation of high-performance Cu-Ni-Si alloys by adding rare earth elements ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C1/02H02K1/02
CPCC22C1/02C22C9/06H02K1/02
Inventor 朱新德张涛尚兴军
Owner SHANDONG UNIV
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