High-strength and medium-conductivity novel copper alloy Cu-Zn-Cr-RE conducting bar and preparation method

A technology of copper alloy and master alloy, which is applied in the field of motor rotor material manufacturing, can solve problems such as poor high-temperature strength, achieve high tensile strength, refine grain size, and improve high-temperature mechanical properties

Active Publication Date: 2017-03-22
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CuZn10 alloy is a single-phase solid solution alloy with adjustable

Method used

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  • High-strength and medium-conductivity novel copper alloy Cu-Zn-Cr-RE conducting bar and preparation method
  • High-strength and medium-conductivity novel copper alloy Cu-Zn-Cr-RE conducting bar and preparation method
  • High-strength and medium-conductivity novel copper alloy Cu-Zn-Cr-RE conducting bar and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1:

[0026] A high-strength, medium-conductivity new copper alloy Cu-10Zn-0.25Cr-0.08RE conductor bar and a preparation method thereof, characterized in that it comprises the following steps:

[0027] (1) Ingredients: According to the composition and proportioning requirements, the alloy elements are proportioned, and the corresponding raw materials are selected and weighed; Cu is added by copper plate, Zn is added by zinc ingot, and Cr is by Cu-Cr master alloy The RE is added in a La-Ce intermediate alloy method; wherein, the copper plate is an electrolytic copper plate with a purity greater than 99%. Wherein, the zinc ingot is commercially available No. 2 zinc with a purity greater than 99.95%.

[0028] (2) Melting: Melting in a non-vacuum intermediate frequency induction electric furnace. After the copper plate and Cu-Cr master alloy are smelted, zinc ingots are added, and then La-Ce master alloys are added. After the smelting is completed, they are poured into ing...

Example Embodiment

[0031] Example 2:

[0032] A high-strength, medium-conductivity new copper alloy Cu-6Zn-0.3Cr-0.06RE conductor bar and a preparation method thereof are characterized in that they include the following steps:

[0033] (1) Ingredients: According to the composition and ratio requirements, the alloy elements are proportioned, and the corresponding raw materials are selected and weighed; Cu is added by copper plate, Zn is added by zinc ingot, and Cr is Cu-Cr master alloy The RE is added in a La-Ce intermediate alloy method; wherein, the copper plate is an electrolytic copper plate with a purity greater than 99%. Wherein, the zinc ingot is commercially available No. 2 zinc with a purity greater than 99.95%.

[0034] (2) Melting: Melting in a non-vacuum intermediate frequency induction electric furnace. After the copper plate and Cu-Cr master alloy are smelted, zinc ingots are added, and then La-Ce master alloys are added. After smelting, they are poured into ingots and cooled to room temp...

Example Embodiment

[0037] Example 3:

[0038] A high-strength, medium-conductivity new copper alloy Cu-8Zn-0.3Cr-0.1RE conductor bar and a preparation method thereof are characterized in that they include the following steps:

[0039] (1) Ingredients: According to the composition and ratio requirements, the alloy elements are proportioned, and the corresponding raw materials are selected and weighed; Cu is added by copper plate, Zn is added by zinc ingot, and Cr is Cu-Cr master alloy The RE is added in a La-Ce intermediate alloy method; wherein, the copper plate is an electrolytic copper plate with a purity greater than 99%. Wherein, the zinc ingot is commercially available No. 2 zinc with a purity greater than 99.95%.

[0040] (2) Melting: Melting in a non-vacuum intermediate frequency induction electric furnace. After the copper plate and Cu-Cr master alloy are smelted, zinc ingots are added, and then La-Ce master alloys are added. After smelting, they are poured into ingots and cooled to room tempe...

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Abstract

The invention discloses a high-strength and medium-conductivity novel copper alloy Cu-Zn-Cr-RE conducting bar and a preparation method. A Cu-Zn-Cr-RE alloy material is chemically composed of, by weight percentage, 0.25-0.35% of Cr, 6-10% of Zn, 0.05-0.15% of RE, 0-0.05% of Fe, 0-0.03% of Pb, and the balance copper. The copper alloy has high strength and stable electrical resistivity, and at the room temperature, Rm is greater than or equal to 330 MPa and A is greater than or equal to 15%; and the conductivity can be adjusted according to different Zn contents and is stable. Meanwhile, a dispersed Cr precipitated phase can improve the high temperature performance of the material, the rare earth element RE can remarkably refine grains and improve the strength, and at the temperature of 350 DEG C, Rm is greater than or equal to 280 MPa and A is greater than or equal to 8%. The conducting bar made of the material can meet the requirements of an asynchronous traction motor for the high rotating speed, high temperature and good stability, and especially can meet the requirement for good softening resistance performance at the temperature of 350 DEG C. The preparation process is simple, energy is saved, consumption is reduced, and manufacturing cost is lowered.

Description

technical field [0001] The invention relates to the technical field of motor rotor material manufacturing, in particular to a method for preparing a high-strength, medium-conductivity new copper alloy Cu-Zn-Cr-RE guide bar for an asynchronous traction motor rotor. Background technique [0002] With the development of rail transit and high-speed rail, the requirements for its traction power—asynchronous traction motors are getting higher and higher, and the motor rotor is the core component of asynchronous traction motors. At present, there are three manufacturing technologies for motor rotors. Cast aluminum rotors have high energy consumption and low efficiency. Cast copper technology is still in the research and development stage. Generally, the rotors of high-speed asynchronous traction motors are embedded in the iron core with guide bars and welded together with the end rings. Therefore, the performance and quality of the guide bar are directly related to the performance ...

Claims

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Application Information

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IPC IPC(8): C22C9/04C22C1/03C22F1/08
CPCC22C1/03C22C9/04C22F1/08
Inventor 马明月庾高峰张航武旭红王文斌
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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