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Preparation method of copper-based pantograph slide plate blank

A pantograph sliding plate and copper-based technology, applied in the field of powder metallurgy, can solve the problems of poor wear resistance of powder metallurgy sliding plates, and achieve the effects of low cost, convenient operation and reasonable process

Inactive Publication Date: 2018-01-16
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing copper-based pantograph slide blanks with simple process and low cost. The prepared powder metallurgy slide has excellent performance and solves the problem of poor wear resistance of powder metallurgy slides

Method used

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  • Preparation method of copper-based pantograph slide plate blank
  • Preparation method of copper-based pantograph slide plate blank
  • Preparation method of copper-based pantograph slide plate blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Mixing material: according to the chemical composition Cu-10Sn-4Bi-2.5Cr-2.5C-0.6P-2MoS 2 (mass percentage) carries out batching, and batching is respectively 72.4% copper powder, 10% tin powder, 4% bismuth powder, 2.5% chromium powder, 2.5% graphite powder, 6% copper-phosphorus alloy powder (P quality Fraction 10%) and 2% molybdenum disulfide, add 0.6% powder lubricant.

[0025] 2. Forming: The above-mentioned mixed powder is molded at room temperature under 600MPa, and the green density is 7.3g / cm 3 .

[0026] 3. Sintering: put the green body above into a continuous sintering furnace for sintering, the sintering temperature is 920°C, the sintering time is 25min, and the sintering atmosphere is nitrogen-hydrogen mixed gas.

[0027] 4. Recompression: Press the sintered part at a pressure of 600MPa under the condition of mold wall lubrication, and keep the pressure for 1.5min;

[0028] 5. Re-firing: The above-mentioned re-pressed parts are re-fired in a continuous ...

Embodiment 2

[0031] 1. Mixing: According to the chemical composition Cu-8.7Sn-3.5Bi-0.9Mo 2 C-1.5Cr-0.6P-5C (mass fraction) is used for batching, and the batching is 86.9% Cu-10Sn-4Bi-1Mo 2 C diffusion alloy powder, 1.5% chromium powder, 6% copper-phosphorus alloy powder (P mass fraction 10%) and 5% graphite powder, add 0.6% powder lubricant.

[0032] 2. Forming: The above-mentioned mixed powder is molded at room temperature under 600MPa, and the green density is 6.9g / cm 3 .

[0033] 3. Sintering: put the green body above into a continuous sintering furnace for sintering, the sintering temperature is 800°C, the sintering time is 25min, and the sintering atmosphere is nitrogen-hydrogen mixed gas.

[0034] 4. Recompression: Press the sintered part at a pressure of 600MPa under the condition of mold wall lubrication, and keep the pressure for 1min;

[0035] 5. Re-firing: The above-mentioned re-pressed parts are re-fired in a continuous sintering furnace, the sintering temperature is 700°C,...

Embodiment 3

[0038] 1. Mixing: According to the chemical composition Cu-8.6Sn-3.5Bi-3.9Mo 2 C-0.6P-4C (mass fraction) is carried out batching, batching is respectively 86.4% Cu-10Sn-4Bi-1Mo 2 C diffusion alloy powder, 3% molybdenum carbide powder, 6% copper-phosphorus alloy powder (P mass fraction 10%) and 4% graphite powder, add 0.6% powder lubricant.

[0039] 2. Forming: Press the mixed powder above in a warm mold at 70°C with a pressure of 600MPa and a green density of 7g / cm 3 .

[0040] 3. Sintering: put the green body above into a continuous sintering furnace for sintering, the sintering temperature is 800°C, the sintering time is 25min, and the sintering atmosphere is nitrogen-hydrogen mixed gas.

[0041] 4. Recompression: Press the sintered part at a pressure of 600MPa under the condition of mold wall lubrication, and keep the pressure for 2 minutes;

[0042] 5. Re-firing: The above-mentioned re-pressed parts are re-fired in a continuous sintering furnace, the sintering temperatu...

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Abstract

The invention discloses a preparation method of a copper-based pantograph slide plate blank. The method includes the steps that powder mixing is conducted on 5-15 % by mass of Sn, 1-5% by mass of Bi,0-5% by mass of Cr, 0%-8% by mass of Mo2C, 0-8% by mass of WC, 1-10% by mass of graphite, 0.1-0.8% by mass of P, 0-5% by mass of MoS2, 0.2-0.8% by mass of powder lubricant and the balance of Cu, and forming, sintering, re-pressing and re-sintering are conducted on mixed powder in sequence to obtain the copper-based pantograph slide plate blank. According to the method, primary sintering, re-pressing and re-sintering are conducted on a green body, so that combination between the anti-abrasive agent, namely, the graphite and a matrix is further enhanced; moreover, the reinforcement elements of Cr, WC and Mo2C and the low-melting-point anti-abrasive component Bi are added into the ingredient, so that the frictional wear performance of a slide plate is further improved; the method has the advantages that the technology is simple, operation is convenient, and the cost is low; meanwhile, pollution of the environment is low, and mass production is available.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method of a copper-based pantograph blank. Background technique [0002] In recent years, my country's high-speed trains have been booming. As an important part of pantograph slides, their quality requirements are becoming more and more stringent, and their performance must meet the following requirements: (1) Excellent electrical conductivity and heat resistance; (2) Certain mechanical strength and apparent hardness, tensile strength and impact resistance; (3) Excellent self-lubricating performance and arc resistance. [0003] There are three main types of pantograph slides at present: powder metallurgy slides, carbon slides and carbon impregnated metal slides. Among them, the powder metallurgy sliding plate has good mechanical properties, moderate surface hardness, and good overall performance, but it wears more on the contact wire. Although...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F5/00B22F1/00C22C9/02
Inventor 李玉柱包崇玺秦晓冬
Owner NBTM NEW MATERIALS GRP
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