Nickel-coated graphite self-lubricating composite material and application thereof

A technology of nickel-coated graphite and composite materials, which is applied in the field of material surface modification to achieve the effects of enhanced wettability, high friction reduction performance and good wetting performance

Active Publication Date: 2013-04-24
SHENYANG AIRCRAFT CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to meet the above requi

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  • Nickel-coated graphite self-lubricating composite material and application thereof
  • Nickel-coated graphite self-lubricating composite material and application thereof
  • Nickel-coated graphite self-lubricating composite material and application thereof

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[0024] Example 1 A nickel-coated graphite self-lubricating composite material and its application

[0025] 1) Nickel-coated graphite self-lubricating composite material: by weight percentage, take 96.17-99.88% of nickel-based alloy powder with a particle size of 45-180 μm and 0.12-3.83% of nickel-coated graphite powder with a particle size of 38 μm, and then use a ball mill to The prepared composite powder is evenly mixed. The specific parameters during mixing are: ball mill speed 300rpm, mixing time 5h, respectively made into five kinds of proportions (b: 99.88%Ni45+0.12wt%Ni / C; c: 99.52%Ni45+0.48wt%Ni / C; d: 98.5%Ni45+1.5wt%Ni / C; e: 97.39%Ni45+2.61wt%Ni / C; f: 96.17%Ni45+3.83wt%Ni / C) nickel-coated graphite self-lubricating composite material. Wherein, described nickel-coated graphite powder is made up of 75% nickel and 25% graphite by weight percentage;

[0026] 2) Using the preset method, the nickel-coated graphite self-lubricating composite material is evenly preset on t...

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Abstract

The invention relates to a nickel-coated graphite self-lubricating composite material and an application thereof. An employed technical scheme is that the nickel-coated graphite self-lubricating composite material is composed of, by weight percent: 95.0-99.9 % of self-melting alloy powder and 0.1-5.0 % of nickel-coated graphite. A laser cladding coating process comprises taking the self-melting alloy powder and the nickel-coated graphite, uniformly mixing by a ball milling method or a grinding method, using a preset method or a powder feeding method, and using a continuous CO2 laser device for laser cladding on a substrate. A content of the nickel-coated graphite varies widely. The nickel-coated graphite is uniform and dense in coating structure, excellent in wear resistance and antifriction performances, and good in metallurgy combination with substrates, can meet requirements of carbon steel and alloy steel for friction and wear performance in different working conditions. A coating preparation process is high in scale and automation degree, and thus the nickel-coated graphite self-lubricating composite material can be widely applied in fields of aerospace, machinery, automobile, military industry, etc.

Description

technical field [0001] The invention belongs to the technical field of material surface modification, and in particular relates to a nickel-coated graphite composite material with self-lubricating properties and a method for preparing a self-lubricating coating on the surface of a substrate by laser cladding technology. Background technique [0002] With the sharp increase in the speed and load of modern machinery and mechanisms, as well as the development of aerospace, military and nuclear energy technologies, many working conditions are in the state of no oil lubrication or less oil lubrication. At this time, more stringent performance requirements are put forward for materials. , it should not only have excellent wear resistance, but also have good anti-friction performance. However, it is difficult to meet the above requirements by adopting traditional alloy design ideas. Since the friction and wear failure behaviors all originate from the surface of the part and gradua...

Claims

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Application Information

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IPC IPC(8): C22C19/03B22F1/00C23C24/10
Inventor 刘艳梅王存山刘标马超林国强
Owner SHENYANG AIRCRAFT CORP
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