Diphase nanometer strengthened metal matrix micro-nanometer power and preparation method thereof with both antifriction and wear-resistant effects

A nano-enhanced, metal-based technology, applied in the direction of coating, etc., to achieve the effects of narrow heat-affected zone, fine and dense structure, and good laser absorption rate

Inactive Publication Date: 2013-03-27
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that there is no powder material with both wear-reducing and wear-resistant effects and good absorption of laser light available in the existing laser processing technology field, and to invent a nano-carbon black p

Method used

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  • Diphase nanometer strengthened metal matrix micro-nanometer power and preparation method thereof with both antifriction and wear-resistant effects
  • Diphase nanometer strengthened metal matrix micro-nanometer power and preparation method thereof with both antifriction and wear-resistant effects
  • Diphase nanometer strengthened metal matrix micro-nanometer power and preparation method thereof with both antifriction and wear-resistant effects

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example 1

[0041] Materials used in this example: the average particle size of nano-carbon black powder is 18nm, the coloring strength is 135%, and the mass fraction is 1%; the nano-ceramic powder is silicon carbide powder, and its average particle size is 30nm, and the mass fraction is 1%; The powder is Al-Si alloy powder, the average particle size is 50 μm, and the mass fraction is 98%. The above method is prepared, and the ball milling composite parameters are ball milling speed of 200 rpm, ball to material ratio of 8:1, and ball milling time of 1 hour. Observed by scanning electron microscope, the prepared micro-nano powder maintains the spherical characteristics of micro-powder ( figure 1 ), the surface of which is coated with a large amount of nano-carbon black powder and nano-silicon carbide powder with high dispersion characteristics ( figure 2 ), forming the core-shell structure of the present invention. The laser wear-resistant modified layer prepared by using the micro-nano...

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Abstract

Diphase nanometer strengthened metal matrix micro-nanometer power and a preparation method thereof with both antifriction and wear-resistant effects are characterized in that, the diphase nanometer strengthened metal matrix micro-nanometer power is composed of compositions of, by weight percentage, nanophase carbon black power of 0.5-1.5%, nanophase ceramics power of 0.5-1.5% and micron metal powder of 97-99%, wherein the sum of the weight percentage of the compositions is 100%; micro-nanometer power in a core shell structure and with the micron metal powder as a core and with the nanophase carbon black power and the nanophase ceramics power as a shell is formed, and the preparation method of the micro-nanometer power mainly includes preparation of single-phase nanophase carbon black suspension liquid and single-phase nanophase ceramics suspension liquid, preparation of carbon black and ceramics diphase suspension liquid, pre-spheroidization of the micron metal powder, drying of the carbon black and ceramics diphase suspension liquid, and drying of ball-milling composite and micro-nanometer slurry after ball-milling compositing of the micron metal powder after preprocessing. A laser wear-resistant modified layer prepared by the preparation method is small in friction coefficient, low in volume abrasion rate, narrow in heat affected zone, tiny and compact in organization, and basically without carbide mingled, has a better mechanical property compared with reproducing of micrometer power, and simultaneously, the micro-nanometer power has good absorptivity for lasers.

Description

technical field [0001] The invention relates to a metal-based micro-nano powder and a preparation method thereof, in particular to a dual-phase nano-reinforced metal-based micro-nano powder and a preparation method thereof, in particular to a dual-phase nano-powder with wear-reducing and anti-wear effects Phase nano-reinforced metal-based micro-nano powder and preparation method thereof. Background technique [0002] In recent years, a technology for constructing mesoscopic (micro-nano-level) new substances --- micro-nano particle composite technology has attracted the attention of experts and scholars at home and abroad. Micro-nano particle composite technology is a technology that coats nanoparticles on the surface of micro-particles or disperses them in micro-particles to prepare micro-nano composite powders with micro-nano synergistic multifunctional effects. [0003] It is well known that an important aspect of laser surface modification is to improve the wear resistan...

Claims

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Application Information

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IPC IPC(8): B22F1/02
Inventor 王宏宇刘桂玲王荣金镜沈清吴志奎黄舒程满施森杰
Owner JIANGSU UNIV
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