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Manufacturing method and application of nano intermetallic compound dispersion strengthened copper alloy

A dispersion-strengthened copper and nano-metal technology, applied in friction linings, mechanical equipment, etc., can solve the problem that the quality is difficult to meet the requirements of high-speed operation of standard EMUs, the uniformity of structure and performance, and casting shrinkage, which affects quality reliability and stability problems such as resistance, to achieve the effect of fine grains, uniform distribution, and good electrical conductivity

Active Publication Date: 2021-04-23
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current high-speed train motor friction discs of France's Mersen and Japan's Mitsubishi have problems such as low density, uniformity of structure and performance, and difficulty in controlling defects such as casting shrinkage porosity and shrinkage cavities, which seriously affect the reliability and stability of their quality. sex
Although the two have occupied the main market of high-speed train motors with a speed of less than 300 kilometers per hour in the world, the application test on the "Fuxing" train with a speed of 350 kilometers per hour in my country shows that its quality is still difficult to meet my country's standard high-speed electric train unit (CEMU). running requirements

Method used

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  • Manufacturing method and application of nano intermetallic compound dispersion strengthened copper alloy
  • Manufacturing method and application of nano intermetallic compound dispersion strengthened copper alloy
  • Manufacturing method and application of nano intermetallic compound dispersion strengthened copper alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Test equipment and drugs

[0040] 1.1. Test equipment and test instruments

[0041] 1) JBW-300H instrumented impact testing machine;

[0042] 2) CMT5015 microcomputer-controlled universal testing machine;

[0043] 3) Vickers hardness tester;

[0044] 4) Metallographic microscope;

[0045] 5) Scanning electron microscope;

[0046] 6) X-ray diffractometer;

[0047] 7) AztecX-Max50 energy spectrometer;

[0048] 8) Beaker, alcohol cotton, tweezers, sandpaper, polishing machine, ultrasonic cleaning machine;

[0049] 9) MFT-3000 friction and wear testing machine

[0050] 1.2. Test drugs

[0051] 1) Ethanol cleaning agent

[0052]2) Concentrated hydrochloric acid, concentrated nitric acid (mixed into aqua regia at a volume of 3:1)

[0053] 2. Characterization and test methods

[0054] 2.1. X-ray diffraction analysis

[0055] The surface of the sample was flattened and measured with a Bruker AXS D8-Advance X-ray diffractometer (Cu target, Kα λ=0.154nm. Bruker, Ge...

Embodiment 2

[0127] The difference between this example and Example 1 is that a nano-intermetallic compound dispersion-strengthened copper alloy is provided, the composition and mass percentage are as follows: Sn: 4%, Ni: 4%, Ag: 0.05%, rare earth elements: 0.07 %, Zn: 2.43%, Al: 4%, Mn: 3.5%, Sc: 0.05; B: 0.02%; rare earth elements include Ce, La and Y; Ce: 0.019%, La: 0.038%, Y: 0.013%, The balance is Cu.

[0128] A method for manufacturing a nanometer intermetallic compound dispersion-strengthened copper alloy, comprising the following steps:

[0129] Step 1: Use a power frequency melting furnace to melt copper alloy: Preheat the power frequency melting furnace at 600°C. After the preheating is complete, put Zn into the bottom of the power frequency melting furnace, then cover Cu on the Zn, and heat up to 750°C within 30 minutes After melting, the temperature is raised to 2300°C within 4 hours, and then Sn, Ni, Ag, rare earth elements and X are added. The power frequency melting furnac...

Embodiment 3

[0136] The difference between this embodiment and Embodiment 1 is that a nano-intermetallic compound dispersion-strengthened copper alloy is provided, the composition and mass percentage are as follows: Sn: 6%, Ni: 2%, Ag: 0.3%, rare earth elements: 0.12 %, Zn: 2%, Mn: 3.5%, Sc: 0.02%; B: 0.02%; rare earth elements include Ce, La, Y and Pr; Ce: 0.019%, La: 0.038%, Y: 0.013%, Pr: 0.05%, the balance is Cu.

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Abstract

The invention discloses a manufacturing method and application of nano-intermetallic compound dispersion strengthened copper alloy. The composition and mass percentage of the copper alloy are as follows: Sn: 4-8%, Ni: 1.5-4%, Ag: 0.05-0.6%, rare earth elements : 0.07~0.2%, Zn: 1.48~2.43%, X: 3.52~7.57%; wherein, X is any one or more of Al, Mn, Sc, B; rare earth elements include at least Ce, La and Y; The mass percentage of rare earth elements and Sn is 1:(40~55); the mass percentage of Ce, La and Y is (0.2~0.5):1:(0.1~0.35), and the balance is Cu. The copper alloy can be used in friction discs of high-speed train motor rotors. The copper alloy of the invention has good wear resistance and electrical conductivity.

Description

technical field [0001] The invention relates to a nanometer intermetallic compound dispersion-strengthened copper alloy and a manufacturing method and application thereof, belonging to the technical field of alloy materials. Background technique [0002] As a key component of the high-speed train power system, the traction motor's performance is related to the capacity and safety of the high-speed train. The basic channel of its power output is the flexible contact between the friction disc at the end of the motor rotor and the carbon brush. Usually, the operating power of the motor is above 650Kw, the rotor speed reaches 4000~5000rpm, and the working current is as high as 150~175A. The friction disc and carbon brush are prone to damage or unreliable contact under high-speed rotation, resulting in power supply failure. In addition to the scientific design of the motor system, the quality of the rotor friction disc is one of the main factors that determine the working effici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/02C22C32/00C22C1/02C22C9/06C22C9/01F16D69/02
CPCC22C1/02C22C9/01C22C9/02C22C9/06C22C32/00F16D69/027
Inventor 张保森王章忠朱帅帅巨佳卢镔陶学伟张超
Owner NANJING INST OF TECH
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