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Preparation method of high-strength rare-earth-doped copper alloy

A technology of rare earth doping and copper alloy, which is applied in the field of high-strength and high-conductivity copper alloy, can solve the problems of high-performance copper alloy material gap and achieve the effect of improving tensile strength

Inactive Publication Date: 2014-01-08
佛山市宇光电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although my country has become the world's largest copper alloy production and consumption country, there is still a big gap between the world's advanced level in the development of high-performance copper alloy materials and smelting technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The copper alloy used contains the following components by weight: 0.5% Yb, 0.8% Nd, 5.0% Cr, 8.0% Zr, 0.10% Mg, 0.08% Ag, 0.001% Ni, 0.001 % Mn, 0.005% Ti, and unavoidable impurities, and the balance is copper. First of all, electrolytic copper is used as the copper raw material, and various alloy elements are added to the melting equipment according to the ratio. The melting equipment is an intermediate frequency vacuum induction furnace. The alloy is in a molten state. The molten alloy was poured slowly at a centrifugal speed of 300 r / min at a pouring temperature of 1200° C., and argon gas was filled into the smelting equipment to 0.5 MPa during pouring to obtain an ingot. Then, after cooling the ingot to room temperature, heat it to 800°C for annealing, and keep it warm for 4 hours, then air-cool it, then heat the ingot that was air-cooled to 300°C to 550°C for tempering, and keep it warm for 2 hours, and finally again The normal temperature tensile strength of th...

Embodiment 2

[0016] The copper alloy used contains the following components by weight: 0.8% Yb, 1.0% Nd, 4.0% Cr, 5.0% Zr, 0.30% Mg, 0.05% Ag, 0.005% Ni, 0.005% % Mn, 0.005% Ti, and unavoidable impurities, and the balance is copper. First of all, electrolytic copper is used as the copper raw material, and various alloy elements are added to the smelting equipment according to the ratio. The smelting equipment is an intermediate frequency vacuum induction furnace. The alloy is in a molten state. The alloy in the molten state was poured slowly at a centrifugal speed of 350 r / min at a pouring temperature of 1200° C. During pouring, argon gas was filled into the smelting equipment to 0.5 MPa to obtain an ingot. Then, after cooling the ingot to room temperature, heat it to 850°C for annealing, and keep it warm for 3 hours, then air-cool it, then heat the ingot that was air-cooled to 300°C to 600°C for tempering, and keep it warm for 1 hour, and finally again The normal temperature tensile str...

Embodiment 3

[0018] The copper alloy used contains the following components by weight: 1.0% Yb, 1.0% Nd, 3.0% Cr, 6.0% Zr, 0.20% Mg, 0.03% Ag, 0.001% Ni, 0.005% % Mn, 0.001% Ti, and unavoidable impurities, and the balance is copper. Firstly, electrolytic copper is used as the copper raw material, and alloy elements are added to the smelting equipment according to the ratio. The smelting equipment is an intermediate frequency vacuum induction furnace. The alloy is in a molten state. The alloy in the molten state was poured slowly at a centrifugal speed of 350 r / min at a pouring temperature of 1200° C. During pouring, argon gas was filled into the smelting equipment to 0.5 MPa to obtain an ingot. Then, after the ingot was cooled to room temperature, it was heated to 850°C for annealing, and kept for 2 hours, then air-cooled, and the ingot that was air-cooled to 300°C was reheated to 500°C for tempering, and kept for 1 hour, and finally again The normal temperature tensile strength of the c...

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Abstract

The invention provides a preparation method of a high-strength rare-earth-doped copper alloy. The preparation method comprises an alloy smelting step, a casting step and a heat treatment step. The preparation method, by doping rare earth elements Yb and Nd, remarkably improves the copper alloy as well as increases electrical conductivity and tensile property through a heat treatment process; the preparation method obviously improves tensile strength, ductility and electrical conductivity of the alloy.

Description

technical field [0001] The invention relates to the field of high-strength and high-conductivity copper alloys, in particular to a preparation method of high-strength rare earth-doped copper alloys. Background technique [0002] High-performance copper alloys are important materials for the national economy. Pure copper has excellent electrical conductivity, but its tensile strength can only reach up to 350MPa, which cannot meet the needs of the rapidly developing aerospace, electronics, transportation, and national defense industries. Therefore, it is necessary to research and develop high-performance copper alloy materials to meet the new needs of the continuously developing national economy. Research on high-performance copper alloy materials mainly focuses on electrical copper alloys, lead-free and environmentally friendly copper alloys, high-strength wear-resistant copper alloys, highly purified copper and copper-based composite materials. The development direction is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/02C22F1/08
Inventor 王增琪
Owner 佛山市宇光电气有限公司