High-performance copper alloy prepared by casting method

A copper alloy, high-performance technology, applied in the field of copper alloy, can solve the problems such as unreported conductivity data, achieve the effect of promoting non-uniform nucleation, realizing effective regulation, and improving comprehensive performance

Active Publication Date: 2020-03-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper alloys prepared by these methods have high strength, but no conductivity data have been reported

Method used

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  • High-performance copper alloy prepared by casting method
  • High-performance copper alloy prepared by casting method
  • High-performance copper alloy prepared by casting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: Alloy A and its preparation

[0049] According to the nominal composition of alloy A in Table 1, alloy raw materials are prepared, and pure metals Cu, Cr, Zr and M (M is RE (La:Ce:Yb=1:3:1 (mass ratio)), Mg , Ag, B mixture, its specific ratio is RE:Mg:Ag:B=3:1:2:1 (mass ratio)) and other alloy raw materials are vacuum smelted, adopt argon protection; After complete alloying, the alloy melt was poured into a mold (the mold was soaked in liquid nitrogen for 10min) to prepare an alloy ingot. The TEM photo of the alloy microstructure is as follows: figure 1 As shown; the alloy ingot is homogenized and kept at 900°C for 2 hours; the treated alloy ingot is forged and deformed, and the deformation is 10%; then the ingot is put into a vacuum furnace and kept at 700°C 30min; the alloy ingot is rolled for 5 passes, the rolling temperature is room temperature, and the total reduction is 60%; the alloy ingot is subjected to aging heat treatment, the aging temperature...

Embodiment 2

[0050] Embodiment 2: Alloy B and its preparation

[0051] According to the nominal composition of the alloy (as shown in B in Table 1), pure metals are required, and the raw materials Cu, Cr, Zr and M (M is RE (La:Ce:Yb=1:3:1 (mass ratio)), Mg , Ag, Si mixture, the specific ratio is RE:Mg:Ag:Si=3:1:2:1 (mass ratio)) placed in the crucible of the vacuum melting furnace, the alloy is smelted, and the melting temperature is 1400°C After all the alloying elements are melted and alloyed, the alloy melt is poured into a mold (the mold is soaked in liquid nitrogen for 10 minutes) to prepare an alloy ingot; the alloy ingot is homogenized and kept at 850°C for 2 hours; The alloy ingot is forged and deformed with a deformation of 10%; then the ingot is put into a vacuum furnace and kept at 850°C for 30 minutes; the alloy ingot is rolled for 5 passes at room temperature and the total reduction is 70%; the alloy ingot is subjected to aging heat treatment, the aging temperature is 450°C, ...

Embodiment 3

[0052] Embodiment 3: Alloy C and its preparation (composition is shown in C in Table 1)

[0053] According to the nominal composition of the alloy (as shown in B in Table 1), pure metals are required, and the raw materials Cu, Cr, Zr and M, M are RE (La:Ce:Yb=1:3:1 (mass ratio)), Mg , Ag, the mixture of Ga, its specific ratio is RE:Mg:Ag:Ga=3:1:2:1 (mass ratio)) is placed in water-cooled copper crucible magnetic levitation smelting furnace copper crucible, alloy is smelted, wait After all the alloying elements are melted and complete, the alloy melt is poured into the mold to prepare alloy ingots; the alloy ingots are homogenized and kept at 800°C for 2 hours; the alloy ingots are forged and deformed with a deformation of 10%. Then put the ingot into a vacuum furnace and keep it warm at 900°C for 5 hours; carry out multi-pass rolling on the alloy ingot, the rolling temperature is room temperature, and the total reduction is 90%; carry out aging heat treatment on the alloy ingo...

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Abstract

The invention relates to a high-performance copper alloy prepared by a casting method, and belongs to the field of copper alloys. The copper alloy comprises Cu, Cr, Zr and M, wherein the mass percentof the Cr is 0.1-5.0%, and the mass percent of the Zr is 0.1-5.0%; the M is composed of RE and at least two of Mg, Ag, B, Ga, Si, Li, Ti, Fe and Mn; the RE is selected from at least three of Ce, La, Yb, Pr, Nd and Sm; and the mass ratio of the M in the high-performance copper alloy is 0.05-0.5%. The high-performance copper alloy is subjected to casting to obtain an as-cast alloy ingot, and the as-cast alloy ingot is subjected to heat treatment and deformation treatment to obtain a finished product with excellent mechanical properties and electrical conductivity.

Description

technical field [0001] The invention relates to a high-performance copper alloy prepared by a melting and casting method, belonging to the field of copper alloys. [0002] technical background [0003] Cu-Cr-Zr alloy has good electrical and thermal conductivity, but also has high strength, good wear resistance, corrosion resistance and high temperature fatigue resistance, and is widely used in electrical, electronic, transportation and machinery manufacturing and other fields . However, Cr and Zr elements are difficult to dissolve in the Cu matrix and have active chemical properties, so it is easy to preferentially form a coarse and refractory hard second phase during the solidification process, resulting in uneven alloy composition and structure. At present, the Cu-Cr-Zr alloy is prepared by melting and casting, and the subsequent treatment is mainly used to optimize the microstructure of the alloy to improve the overall performance of the alloy. [0004] Mishnev et al [Mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22F1/08C22C1/02
CPCC22C1/02C22C9/00C22F1/08
Inventor 刘祖铭赵凡黄伯云吕学谦李全彭凯
Owner CENT SOUTH UNIV
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