CN102925740A

CN102925740A - Manufacturing method of pantograph sliding plate material enhanced by copper plated Ti3AlC2

Info

Publication number: CN102925740A
Application number: CN2012104431676A
Authority: CN
Inventors: 李长生; 唐华; 常方圆; 范有志; 钱周
Original assignee: ZHENJIANG ZHONGFU COMPOSITE CO Ltd
Current assignee: ZHENJIANG ZHONGFU COMPOSITE CO Ltd
Priority date: 2012-11-08
Filing date: 2012-11-08
Publication date: 2013-02-13

Abstract

The invention discloses a manufacturing method of a pantograph sliding plate material enhanced by copper plated Ti3AlC2. The manufacturing method includes: the copper plated Ti3AlC2, NbSe2 and Cu powder are mixed evenly, a cold-pressing sintering method is adopted, initial pressure is 100MPa, pressure holding time is 10-20min, sintering is performed at the temperature of 700-900 DEG C under the protection of argon, the temperature is kept for 0.5-1h, the mixture is cooled to the room temperature along with a furnace, re-pressing is performed under the pressure of 200MPa, pressure holding time is 10-20 min, sintering is performed at the temperature of 700-900 DEG C, and the temperature is kept for 1-2h, wherein additive amount of NbSe2, Ti3AlC2 and Cu is respectively 1-9%: 1-9%: 90-98%. The surface of Ti3AlC2 is plated by copper so as to improve wettability between particles and a base body, interfacial strength is improved, the copper plates Ti3AlC2 and NbSe2 enhanced copper base are used for manufacturing a novel pantograph sliding plate material, and friction performance, bending strength, hardness and particular conductivity of the pantograph material are improved greatly. The method enables the material to be synthesized rapidly and conveniently.

Description

A kind of with copper facing Ti 3AlC 2Strengthen the preparation method of Material for Pantograph Slide

Technical field

The present invention relates to the Metallic Functional Materials technical field, be specifically related to a kind of with copper facing Ti ₃AlC ₂Strengthen the preparation method of Material for Pantograph Slide.

Background technology

High-speed railway is a kind of novel rail transit system that China gives priority to, this system is the electric power flog system, F-Zero can reach more than the 350km/h, has the advantages such as transportcapacity is large, speed is fast, safety performance is good, energy consumption is low, pollution is light, and the superiority of not replacing is arranged.The development of bullet train has proposed higher performance requriements, such as high conduction, high abrasion, shock-resistant to its key part one pantograph slide block.About the still deep research of shortage system of preparation, structure and performance of this parts, all there are problems in actual use in existing sliding block material at present, and the sliding block material of China's practical application adopts imported product mostly at present.Copper-graphite-MoS ₂Be typical sliding contact material, be widely used in conduction current between the fixing part of motor and the turning unit (reverser or ring header).But copper-graphite-MoS ₂There is MoS ₂High, the poor electric conductivity of resistivity, graphite, MoS ₂Softer, the supporting capacity of contact material and the problem such as wear no resistance.When sliding contact material uses, can produce electrical spark under large electric current, high-speed case, elevate the temperature, be adsorbed on the moisture evaporation on surface, destroy surperficial membrane integrity, cause abrasive wear.

Ti ₃AlC ₂Has good specific conductivity, lower density, heat conduction, electroconductibility that they are existing with good like the metallographic phase, the workability relatively soft, that plasticity-is good and superior, the physical and chemical performance close with stupalith arranged again, low density, high-melting-point, anti-oxidant, high heat stability and wear resisting property.More meaningfully it has than the lower frictional coefficient of traditional solid lubricant graphite, molybdenumdisulphide and good self-lubricating property.So, Ti ₃AlC ₂Premium properties make it become best particulates reinforcements, and good application prospect is arranged, especially be used on the contact material.The research such as distribution spring Ti ₃SiC ₂Show Cu/Ti during disperse Reinforced Cu sill ₃AlC ₂Composite material strength increases substantially, and lower frictional coefficient is arranged, and is a kind of potential sliding material that electrically contacts.But this material is because the impact of manufacturing process and hardness has limited its further market development.Introducing high-strength ceramic secondary phase strengthened metal base composite material in material is a kind of method commonly used.

NbSe ₂Have and MoS ₂Similar crystalline structure and rubbing characteristics, and resistivity only is 1 * 10 ^-4Ω cm compares MoS ₂Low 6 orders of magnitude are than low 1 order of magnitude of graphite.Use sheet NbSe ₂The matrix material of-Ag preparation successful Application on the conducting slip ring of space shuttle, and NbSe ₂The effect of the existing anti-friction wear-resistant of nanofiber can improve again the mechanical property of matrix material.The investigator has and utilizes nano level NbSe both at home and abroad at present ₂The research of Reinforced Cu-Base Composites.

Summary of the invention

Goal of the invention: for the deficiencies in the prior art, the object of the present invention is to provide a kind of with copper facing Ti ₃AlC ₂Strengthen the preparation method of Material for Pantograph Slide, prepare intensity high, electroconductibility is strong, the Material for Pantograph Slide of friction resistant.

Technical scheme: for achieving the above object, the technical solution used in the present invention is as follows:

A kind of with copper facing Ti ₃AlC ₂Strengthen the preparation method of Material for Pantograph Slide, comprising: get copper-plated Ti ₃AlC ₂, NbSe ₂With the Cu powder, after mixing, adopt cold sintering, original pressure is 100MPa, dwell time is 10 ~ 20min, 700 ~ 900 ℃ of sintering under argon shield, insulation 0.5 ~ 1h cools to room temperature with the furnace, then under 200MPa pressure, carry out multiple pressure, dwell time is 10 ~ 20min, and then at 700 ~ 900 ℃ of sintering, insulation 1 ~ 2h; Wherein, NbSe ₂, Ti ₃AlC ₂With the addition of Cu be 1 ~ 9%:1 ~ 9%:90 ~ 98%(by mass percentage).

NbSe ₂, Ti ₃AlC ₂With the addition of Cu, be preferably 1 ~ 6%:1 ~ 4%:90%.

Adopt cold sintering, original pressure is 100MPa, and multiple pressure pressure is 200MPa, and the dwell time is 15min.

The first burning soaking time of sintering Material for Pantograph Slide is 1h, and the resintering soaking time is 2h.

Copper-plated Ti ₃AlC ₂Prepared by following methods: with Ti ₃AlC ₂Particle deoil and alligatoring after be placed on and carry out magnetic agitation in the chemical plating fluid, bath temperature is 55 ~ 60 ℃, the pH value is 12.5 ~ 13, plating 0.5 ~ 2h gets final product.

Solution composition is: 10g/L copper sulfate, and the 32g/L disodium ethylene diamine tetraacetate, 0.05g/L 2,2 ' one pyrimidine, 10g/L sodium hydroxide, 15mL/L 36% volumetric concentration formaldehyde.

Beneficial effect: compared with prior art, the major advantage that the present invention has comprises: to Ti ₃AlC ₂Carry out copper coating to improve the wetting property between particle and the matrix, improve boundary strength, with copper-plated Ti ₃AlC ₂With NbSe ₂Strengthen the copper base and prepare novel Material for Pantograph Slide, greatly improved the frictional behaviour of pantograph material, bending strength, hardness, especially conductivity, and the method can be synthesized fast and easy to operate this material of preparation.Have good practicality and economy.

Description of drawings

Fig. 1 is embodiment 4 copper facing Ti ₃AlC ₂And NbSe ₂Graphic representation by the linear velocity-frictional coefficient of the Cu-base composites of different proportionings preparation;

Fig. 2 is embodiment 4 copper facing Ti ₃AlC ₂And NbSe ₂Graphic representation by the load-frictional coefficient of the Cu-base composites of different proportionings preparation.

Embodiment

Further illustrate the present invention below in conjunction with specific embodiment, the present embodiment is implemented under take technical solution of the present invention as prerequisite, should understand these modes and only be used for explanation the present invention and be not used in and limit the scope of the invention.

Embodiment 1

Method 1: to Ti ₃AlC ₂Carry out electroless copper, with Ti ₃AlC ₂Particle deoil and alligatoring after be placed on and carry out magnetic agitation in the chemical plating fluid, solution composition is copper sulfate (10g/L), disodium ethylene diamine tetraacetate (32g/L), 2,2 ' one pyrimidine (0.05g/L), sodium hydroxide (10g/L), 36% volumetric concentration formaldehyde (15mL/L), bath temperature is 60 ℃, the pH value is 12.5, plating 2h is with copper facing Ti ₃AlC ₂, NbSe ₂Mix three kinds of composition qualities than being m(NbSe with the Cu powder ₂): m(Ti ₃AlC ₂): m(Cu)=(1 ~ 6%): (1 ~ 4%): (90 ~ 100%); carrying out the compressing tablet original pressure is 100MPa; dwell time is 10min; 700 ℃ of sintering under argon shield, insulation 1h cools to room temperature with the furnace; then under 200MPa pressure, carry out multiple pressure; dwell time is 15min, again at 800 ℃ of sintering, and insulation 2h.

Method 2: with method 1, plating time is 1h.

Control methods 1 and 2 when plating time is that the Material for Pantograph Slide oilness of 2h preparation is better than 1h, is 2h therefore following examples are selected plating time.

Embodiment 2

To Ti ₃AlC ₂Carry out electroless copper, with Ti ₃AlC ₂Particle deoil and alligatoring after be placed on and carry out magnetic agitation in the chemical plating fluid, solution composition is copper sulfate (10g/L), disodium ethylene diamine tetraacetate (32g/L), 2,2 ' one pyrimidine (0.05g/L), sodium hydroxide (10g/L), 36% volumetric concentration formaldehyde (15mL/L), bath temperature is adjusted to 60 ℃, and the pH value is 12.5, plating 2h is with copper facing Ti ₃AlC ₂, NbSe ₂Mix three kinds of composition qualities than being m(NbSe with the Cu powder ₂): m(Ti ₃AlC ₂): m(Cu)=(x%): (10-x%): (90%); carrying out the compressing tablet original pressure is 100MPa; dwell time is 10min; 700 ℃ of sintering under argon shield, insulation 1h cools to room temperature with the furnace; then under 200MPa pressure, carry out multiple pressure; dwell time is 15min, again at 700 ℃ of sintering, and insulation 2h.Change m(NbSe ₂) proportioning x(1 ~ 9), carry out bending strength and frictional experiment and resistivity measurement by the sample to different proportionings.The result as depicted in figs. 1 and 2, Fig. 1 is copper facing Ti ₃AlC ₂And NbSe ₂By the curve of the linear velocity-frictional coefficient of the Cu-base composites of different proportionings preparation, Fig. 2 is embodiment 4 Ti ₃AlC ₂And NbSe ₂Press the bending strength of the Cu-base composites of different proportionings preparations.A1 ~ A7 is Ti respectively ₃AlC ₂Accounting for the mass percent example is 1%, 2%, 4%, 5%, 6%, 8%, 9%, works as m(NbSe ₂): m(Ti ₃AlC ₂)=when 6:4 prepares can obtain best over-all properties.

Claims

1. one kind with copper facing Ti ₃AlC ₂Strengthen the preparation method of Material for Pantograph Slide, it is characterized in that, comprising: get copper-plated Ti ₃AlC ₂, NbSe ₂With the Cu powder, after mixing, adopt cold sintering, original pressure is 100MPa, dwell time is 10 ~ 20min, 700 ~ 900 ℃ of sintering under argon shield, insulation 0.5 ~ 1h cools to room temperature with the furnace, then under 200MPa pressure, carry out multiple pressure, dwell time is 10 ~ 20min, and then at 700 ~ 900 ℃ of sintering, insulation 1 ~ 2h; Wherein, NbSe ₂, Ti ₃AlC ₂Be respectively by mass percentage 1 ~ 9%:1 ~ 9%:90 ~ 98% with the addition of Cu.

2. according to claim 1 with copper facing Ti ₃AlC ₂Strengthen the preparation method of Material for Pantograph Slide, it is characterized in that: NbSe ₂, Ti ₃AlC ₂Be respectively 1 ~ 6%:1 ~ 4%:90% with the addition of Cu.

3. according to claim 1 with copper facing Ti ₃AlC ₂Strengthen the preparation method of Material for Pantograph Slide, it is characterized in that: adopt cold sintering, original pressure is 100MPa, and multiple pressure pressure is 200MPa, and the dwell time is 15min.

4. according to claim 1 with copper facing Ti ₃AlC ₂Strengthen the preparation method of Material for Pantograph Slide, it is characterized in that: copper-plated Ti ₃AlC ₂Prepared by following methods: with Ti ₃AlC ₂Particle deoil and alligatoring after be placed on and carry out magnetic agitation in the chemical plating fluid, bath temperature is 55 ~ 60 ℃, the pH value is 12.5 ~ 13, plating 0.5 ~ 2h gets final product.

5. according to claim 4 with copper facing Ti ₃AlC ₂Strengthen the preparation method of Material for Pantograph Slide, it is characterized in that: solution composition is: 10g/L copper sulfate, and the 32g/L disodium ethylene diamine tetraacetate, 0.05g/L 2,2 ' one pyrimidine, 10g/L sodium hydroxide, 15mL/L 36% volumetric concentration formaldehyde.

6. preparation according to claim 1 strengthens the method for Material for Pantograph Slide with copper facing Ti3AlC2, and it is characterized in that: the first burning soaking time of sintering Material for Pantograph Slide is 1h, and the resintering soaking time is 2h.