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 coatings and other directions, to achieve the effects of good laser absorption rate, strong engineering practicability, and narrow heat-affected zone
Inactive Publication Date: 2014-09-17
JIANGSU UNIV
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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 powder Two-phase nano-reinforced metal-based micro-nano-powder with anti-friction and wear-resistant effects and a preparation method thereof with nano-ceramic powder as reinforcing components, thereby providing a powder material with excellent quality for laser processing technology
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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
A dual-phase nano-reinforced metal-based micro-nano powder with both anti-wear and anti-wear effects and its preparation method is characterized in that it consists of 0.5-1.5% nano-carbon black powder, 0.5-1.5% nano-ceramic powder Composed of 97~99% micron metal powder, the sum of various components is 100%; and form a core-shell structure micro-nano powder with micron metal powder as the core, nano-carbon black powder and nano-ceramic powder as the shell; the The preparation process of micro-nano powder mainly includes the preparation of single-phase nano-carbon black suspension and single-phase nano-ceramic suspension, the preparation of carbon black and ceramic dual-phase nano-suspension, the spheroidization pretreatment of micron metal powder, carbon black and Ball-milling composite of ceramic dual-phase nano-suspension and micron metal powder after pretreatment and drying of micro-nano powder slurry after ball-milling composite. The laser wear-resistant modified layer prepared by the present invention has a small friction coefficient and a low volume wear rate, and has a narrow heat-affected zone, fine and dense structure, basically no carbide inclusions, and has better mechanical properties than micron powder remanufacturing; At the same time, the micro-nano powder has a good absorption rate for laser light.
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...
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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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