Preparation method of copper-based composite material for cylinder sleeve

A copper-based composite material and mixed material technology, applied in metal material coating technology, metal processing equipment, ion implantation plating and other directions, to achieve the effects of good thermal conductivity, improved mechanical properties, and improved surface activity

Inactive Publication Date: 2017-02-01
NINGBO XINMU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Applying copper-based composite materials to the preparation of cylinder liners to solve the problems in the prior art has not yet been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 Preparation of copper-coated single-walled carbon nanotubes

[0036] (1) The dispersion of single-walled carbon nanotubes is to add deionized water, 0.35w / v% SDBS and 0.025w / v% single-walled carbon nanotubes in a beaker, and use a frequency of 35kHz, A probe-type ultrasonic generator with a power of 60W was used for ultrasonic treatment for 30 minutes, during which time the ultrasound was stopped for 5 seconds every 5 seconds.

[0037] Purification pretreatment of single-walled carbon nanotubes: using 6mol / L HNO 3 The above-mentioned fully dispersed single-walled carbon nanotubes were refluxed at 118°C for 5h, cooled, filtered and washed with deionized water until neutral, and then refluxed with 6mol / L NaOH at 118°C for 3h, cooled, filtered and washed with deionized water to The pH value was 7, and then refluxed with 6mol / L HCl at 118°C for 3 hours, cooled, filtered and washed with deionized water until the pH value was 7; the concentration of single-walle...

Embodiment 2

[0041] Embodiment two prepares copper-coated graphene

[0042] Copper-coated graphene is prepared by depositing metallic copper on the surface of graphene (number of layers 1-10) by means of DC magnetron sputtering. The copper target with a purity of 99.99% was first ground with fine sandpaper to remove the surface oxide film before installation, then cleaned with acetone, dried, and pre-sputtered for 5 minutes before deposition by DC magnetron sputtering. Graphene separates, removes metal oxides and other impurities on the target surface, and ensures the purity of the copper film deposited on the subsequent graphene surface. The process parameters of DC magnetron sputtering are: when the vacuum degree reaches 0.1*10 -3 At Pa, argon gas with a purity of 99.99% was introduced, the working pressure was 1.5Pa, the sputtering power was 100W, and the deposition time was 35min.

Embodiment 3

[0043] Embodiment three prepares copper-plated carbon fiber

[0044] The following steps are used to prepare the carbon fibers by copper plating, which include:

[0045] Step A: Carbon Fiber Pretreatment

[0046] Surface degumming: Soak in the boiling acetone solution in the Soxhlet extractor and stir continuously with a stirring porcelain, the temperature is controlled at 70°C, and the stirring time is 240min;

[0047] Surface degreasing: Stir the degummed carbon fiber in 10% NaOH solution for 30 minutes at 25°C, wash the taken out carbon fiber with ethanol and deionized water successively, and dry it for later use;

[0048] Surface roughening: Use potassium persulfate solution with a mass fraction of 10% as the roughening solution, immerse the degreased carbon fiber, and stir continuously for 60 minutes; the roughened carbon fiber is cleaned with a mass fraction of 8% NaOH solution and deionized water To neutral, dry for use;

[0049] Surface activation: One-step method o...

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Abstract

The invention discloses a preparation method of a copper-based composite material for a cylinder sleeve. The preparation method sequentially comprises the following steps that 1, raw materials are weighed, specifically, the raw materials include, by weight, 15 parts of copper-plated carbon nano tubes, 15 parts of copper-plated grapheme, 30 parts of copper-plated carbon fibers, 2.5 parts of nickel powder, 10 parts of Fe powder and 210 parts of copper powder, then 5 parts of lubricating agents are added to the raw materials, ball-milling mixing is carried out for eight hours, and then a mixture is obtained; 2, the mixture prepared in the step 1 is pressed at the pressure of 750 Mpa, and a blank is obtained; 3, the blank prepared in the step 2 is subjected to secondary sintering, and an alloy block is obtained after sintering; and 4, the alloy block treated in the step 3 is subjected to thermal treatment, and then the copper-based composite material for the cylinder sleeve is obtained. The method adopts a specific formula and process, and the obtained cylinder sleeve has the advantages of low coefficient of thermal expansion, good heat conduction property, high high-temperature strength and good wear resistance.

Description

technical field [0001] The invention relates to the technical field of cylinder liner preparation, in particular to a method for preparing a copper-based composite material for a cylinder liner. Background technique [0002] The cylinder liner is the inner lining of the cylinder, which is usually made of gray cast iron or ductile iron. When the engine is working, it is in direct contact with the piston ring. After the cylinder body is cast and formed, it is processed and pressed into it. [0003] Since the cylinder wall bears the stress caused by high-pressure gas and the side thrust of the piston, as well as the thermal stress caused by high-temperature gas, the cylinder liner material must have high structural strength and fatigue strength to avoid deformation of the cylinder liner or premature fatigue damage of the material, The cylinder liner must also have good wear and seizure resistance. [0004] Copper and its alloys have become widely used metal materials due to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/02C22C49/14C22C47/04C22C47/14C23C18/40C23C14/35C23C14/18C23C18/18C22F1/08B22F1/02C22C101/10
CPCC22C47/04C22C47/14C22C49/02C22C49/14C22F1/08C23C14/185C23C14/35C23C18/1844C23C18/405B22F2998/10B22F1/17B22F3/02B22F3/1007B22F2003/248B22F1/10
Inventor 姚国强
Owner NINGBO XINMU NEW MATERIALS
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