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Ni-doped Ti3SiC2/Cu composite material and preparation method and application thereof

A composite material and powder technology, which is applied in the field of copper-based composite material preparation, can solve problems such as increased turning resistance of turnouts, increased switching resistance, and poor switching of turnouts, and achieves the effects of increasing service life, improving service performance, and improving material properties

Active Publication Date: 2021-09-17
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although this method can achieve the purpose of anti-friction lubrication, it has obvious defects: climate changes such as rain and snow will emulsify and deteriorate the lubricating oil, and exposure to the sun will reduce the viscosity of the lubricating oil and lose it. The leakage of transported goods is mixed with the unavoidable dust, sand, coal powder and other sundries on the railway and lubricating oil, resulting in increased switching resistance and poor switch switching
This kind of pollution and erosion will lead to an increase in the turning resistance of the turnout, and the service life of the electric switch machine is 1 to 2 years less than that of the ordinary track environment.
Incidents of stoppage of turnouts and interruption of driving operations due to lubrication failures occur from time to time, and the problem of turnout maintenance and maintenance is very prominent

Method used

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  • Ni-doped Ti3SiC2/Cu composite material and preparation method and application thereof
  • Ni-doped Ti3SiC2/Cu composite material and preparation method and application thereof
  • Ni-doped Ti3SiC2/Cu composite material and preparation method and application thereof

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preparation example Construction

[0041] A kind of Ni-doped Ti of the present invention 3 SiC 2 / Cu composite material and preparation method thereof, comprising the following steps:

[0042] S1, the Ti 3 SiC 2 Powder, Ni powder and Cu powder are mixed according to a certain composition ratio, and poured into a ball mill tank for ball milling;

[0043] Ti 3 SiC 2 The composition ratio of powder, Ni powder and Cu powder is: Ti 3 SiC 2 The powder composition is 10Vol.% to 30Vol.%, the Ni powder composition is 8Vol.% to 10Vol.%, and the Cu powder composition is 60Vol.% to 82Vol.%.

[0044] Ti 3 SiC 2 The particle size of the powder is 200-325 mesh, the purity is 97.5%-99.0%, and the shape structure is irregular; the particle size of the Ni powder is 100-200 mesh, the purity is 98.5%-99.9%, water atomized spherical powder; Cu powder The particle size is 100-200 mesh, the purity is 98.5%-99.9%, and it is water-atomized spherical powder.

[0045] The ball milling parameters are that the ball milling time ...

Embodiment 1

[0053] Maglev Turnout Sliding Bed Platform

[0054] 1) 30Vol.% Ti 3 SiC 2 powder, 10Vol.% Ni powder and 60Vol.% Cu powder were mixed and poured into a ball mill jar for ball milling.

[0055] Ti 3 SiC 2 The particle size of the powder is 325 mesh, the purity is 99.0%, and the shape structure is irregular; the particle size of the Ni powder is 200 mesh, the purity is 99.9%, and the water atomized spherical powder; the particle size of the Cu powder is 200 mesh, the purity is 99.9%. Water atomized spherical powder. The ball milling parameters are that the ball milling time is 4 hours, and the ball milling speed is 250 rpm.

[0056] 2) Put the ball-milled and uniformly dispersed powder into a specific mold, perform cold pressing and pressureless sintering, and then obtain Ni-doped Ti that can be used for the turnout slide bed platen 3 SiC 2 / Cu composite material.

[0057] A cuboid mold with a size of 20mm×200mm×5mm is used. The cold pressing parameter is a load of 800MP...

Embodiment 2

[0059] Plateau railway turnout sliding bed platform

[0060] 1) 20Vol.% Ti 3 SiC 2 powder, 9Vol.% Ni powder and 71Vol.% Cu powder were mixed and poured into a ball mill jar for ball milling.

[0061] Ti 3 SiC 2 The particle size of the powder is 250 mesh, the purity is 98.0%, and the shape structure is irregular; the particle size of the Ni powder is 150 mesh, the purity is 99.0%, and the water atomized spherical powder; the particle size of the Cu powder is 150 mesh, the purity is 99.0%. Water atomized spherical powder. The ball milling parameters are that the ball milling time is 4 hours, and the ball milling speed is 200 rpm.

[0062] 2) Put the ball-milled and uniformly dispersed powder into a specific mold, perform cold pressing and pressureless sintering, and then obtain Ni-doped Ti that can be used for the turnout slide bed platen 3 SiC 2 / Cu composite material.

[0063]Among them, a cuboid mold with a size of 70mm×70mm×8mm is used. The cold pressing parameter ...

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Abstract

The invention discloses a Ni-doped Ti3SiC2 / Cu composite material and a preparation method and application thereof. A Ti3SiC2 / Cu composite material with the content of Ti3SiC2 being 20Vol.%-25Vol.% is designed by adopting a pressureless sintering powder metallurgy technology and combining with the characteristics of Ni-doped components according to the service condition characteristics of an embedded turnout sliding bed platen material. According to the material, the self-lubricating function can be achieved through Ti3SiC2 particles, through doping of an Ni element, the hardness, bending strength and other mechanical properties of the material are improved, the corrosion resistance and wear resistance of the material are improved, and after the steps of powder blending, ball milling, cold pressing, pressureless sintering and the like, the Ni-doped Ti3SiC2 / Cu composite material capable of being used for a turnout sliding bed platen is obtained. The material can be mechanically fixed on the surface of a Q235 steel plate to form an embedded self-lubricating layer, has excellent antifriction, anti-wear and anti-corrosion properties during service, and has a wide application market.

Description

technical field [0001] The invention belongs to the technical field of preparation of copper-based composite materials, in particular to a Ni-doped Ti 3 SiC 2 / Cu composite materials and their preparation methods and applications. Background technique [0002] The turnout is an important part of the railway line, and it is called the three weak links of the track together with the curve and the joint. Its normal operation is the basic guarantee of driving safety. Turnouts have many characteristics such as large number, complex structure, short service life, limited train speed, low driving safety, and large maintenance and repair investment. According to the railway management method of our country, the maintenance work of the turnout part is the responsibility of the station. Since the turnouts are arranged at both ends of the station and are far apart, in daily maintenance, in order to ensure the normal changeover of the turnouts, the station needs to arrange special per...

Claims

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Application Information

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IPC IPC(8): C22C1/05B22F9/04B22F3/10B22F3/02C22C9/00C22C9/06C22C32/00E01B7/02
CPCC22C1/058B22F9/04B22F3/02B22F3/10C22C9/00C22C9/06C22C32/0089E01B7/02B22F2009/043Y02T30/00
Inventor 王怡然高睿鹏李鸿江高义民
Owner XI AN JIAOTONG UNIV
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