Preparation method of titanium element modified Ti3SiC2 enhanced Cu-base pantograph sliding plate

A technology for pantograph slides and elements, which is applied in the field of preparation of titanium-modified Ti3SiC2 reinforced copper-based pantograph slides, which can solve the problems of poor wear resistance, impact resistance, and low interface bonding strength, etc. Performance and anti-wear performance, guarantee service life, and improve the effect of interface bonding performance

Active Publication Date: 2019-06-07
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pure copper is an excellent electrical and thermal conductor with excellent ductility, but poor wear resistance and low mechanical properties
Compared with ceramic materials, they have high hardness and good wear resistance, but there are still problems such as high brittleness, low impact resistance, low toughness, poor thermal and electrical conductivity, and difficult machining. These shortcomings have always restricted their further development.
At the same time, Ti 3 SiC 2 The interface bonding strength between ceramic and copper substrate is not high, and the wettability is poor
Therefore, the performance still does not meet the requirements for use, which limits the promotion and development of materials in the field of pantograph skateboards

Method used

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  • Preparation method of titanium element modified Ti3SiC2 enhanced Cu-base pantograph sliding plate
  • Preparation method of titanium element modified Ti3SiC2 enhanced Cu-base pantograph sliding plate
  • Preparation method of titanium element modified Ti3SiC2 enhanced Cu-base pantograph sliding plate

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preparation example Construction

[0037] Titanium element modified Ti of the present invention 3 SiC 2 The specific steps of the preparation method of the reinforced copper-based pantograph sliding plate are as follows:

[0038] S1, first fully wash Ti with distilled water 3 SiC 2 powder, and then evaporated to dryness, the dried Ti 3 SiC 2 The powder is subjected to multi-arc ion plating treatment;

[0039] The temperature of evaporative drying is 80-90°C, and the time is 0.5-1 hour.

[0040] Ti 3 SiC 2 The powder is irregular Ti with a particle size of 200-300 mesh and a purity of 97.5-99.5%. 3 SiC 2 Powder; multi-arc ion plating means that the plating time is 0.5 to 1 hour, the plating atmosphere is argon, and the atmosphere pressure is 2 to 3×10 -1 Pa, the coating process with a coating temperature of 250-270°C, a duty ratio of 50-60%, and a bias voltage of 25-35V.

[0041] S2, the Ti after plating 3 SiC 2 The powder and metal powder are ball milled for 2 to 3 hours, and then poured into a mol...

Embodiment 1

[0047] High-speed railway pantograph skateboard

[0048] 1) First, fully wash Ti with distilled water 3 SiC 2 powder, then evaporated to dryness at 80°C for 1 hour. The dried Ti 3 SiC 2 The powder is subjected to multi-arc ion plating treatment. The specific plating parameters are that the plating time is 1 hour, the plating atmosphere is argon, and the atmosphere pressure is 3×10 -1 Pa, the plating temperature is 270°C, the duty cycle is 60%, and the bias voltage is 35V.

[0049] 2) The plated Ti 3 SiC 2 The powder and metal powder are ball milled for 2 hours, and then poured into a mold for cold pressing at a pressure of 700MPa.

[0050] 3) For sintering the cold-pressed green body, evacuate the sintering furnace to vacuum, raise the temperature from room temperature to 400°C at a heating rate of 10°C / min, and then raise the temperature to 820°C at a heating rate of 5°C / min, at 820°C Keep warm for 1 hour, then cool with the furnace.

[0051] 4) Put the sintered gre...

Embodiment 2

[0053] Heavy-duty freight railway pantograph slide

[0054] 1) First, fully wash Ti with distilled water 3 SiC 2 powder, then evaporated to dryness at 90°C for 0.5 hours. The dried Ti 3 SiC 2 The powder is subjected to multi-arc ion plating treatment. The specific plating parameters are that the plating time is 0.5 hours, the plating atmosphere is argon, and the atmosphere pressure is 2×10 -1 Pa, the plating temperature is 250°C, the duty cycle is 50%, and the bias voltage is 25V.

[0055] 2) The plated Ti 3 SiC 2 The powder and metal powder are ball milled for 3 hours, and then poured into a mold for cold pressing at a pressure of 500MPa.

[0056] 3) To sinter the cold-pressed body, evacuate the sintering furnace to vacuum, raise the temperature from room temperature to 450°C at a rate of 20°C / min, and then to 850°C at a rate of 8°C / min. Hold at 850°C for 1.5 hours, then cool in the furnace.

[0057] 4) Put the sintered green body into the mold and carry out repress...

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Abstract

The invention discloses a preparation method of a titanium element modified Ti3SiC2 enhanced Cu-base pantograph sliding plate. The preparation method comprises the steps that Ti3SiC2 ceramics are cleaned; the Ti3SiC2 ceramics are subjected to titanizing treatment by adopting a multi-arc ion plating technology, and a TiN plating layer generated in situ is obtained on the surface of the Ti3SiC2 ceramics; and then the proportioned Ti3SiC2 ceramics and metal powder are poured into a mould for cold pressing, sintering, re-pressing and resintering treatment, and after cooling and demoulding are carried out, the Ti3SiC2 enhanced Cu-base pantograph sliding plate is obtained. Introduced titanium elements can form TiN phases at the interface of a Cu-Ti3SiC2 composite in situ, so that a Cu base and Ti3SiC2 form metallurgical bonding, the interface bonding property of the composite is improved; and decomposition of the Ti3SiC2 can be inhibited through TiN, and it is guaranteed that the structure of the Ti3SiC2 is complete, so that the mechanical property and the wear resistance of the composite are improved, and the service life of the pantograph sliding plate is prolonged.

Description

technical field [0001] The invention belongs to the technical field of preparation of wear-resistant composite materials, and in particular relates to a titanium element modified Ti 3 SiC 2 A method for preparing a reinforced copper-based pantograph slide. Background technique [0002] At this stage, my country is vigorously developing rail transit, including high-speed rail, subway and light rail. As one of the core components of rail transit, the pantograph slide is crucial to the development of related fields in the future. Therefore, the task of developing new pantograph slide materials is imminent. Ti 3 SiC 2 The reinforced copper-based composite material has excellent electrical and thermal conductivity, and maintains the characteristics of ceramics. It can still show good rigidity and plasticity at high temperatures, and has good thermal shock stability; at the same time, the material's oxidation resistance Excellent, also able to maintain high strength. It has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C9/00C22C32/00C23C14/32C23C14/06
Inventor 李烨飞王怡然张若愚高义民赵四勇
Owner XI AN JIAOTONG UNIV
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