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Alloyed material modified by nanometer rare earth oxide, alloyed layer and preparation method thereof

A nano-rare earth and oxide technology, applied in metal material coating process, metal processing equipment, coating and other directions, can solve the problem of difficult graphite retention, reduce inclusions and pores, improve wear resistance, and reduce friction coefficient Effect

Active Publication Date: 2021-12-28
SHANDONG AGRI & ENG UNIV +3
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Improving the wear resistance of the coating can be considered from two aspects: increasing the hardness of the coating and reducing the friction coefficient of the coating surface. Layered graphite is a good solid lubricant, but because Ti and C atoms have strong affinity, it is easy to react to form TiC, and it is difficult to achieve the retention of graphite in the alloyed layer

Method used

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  • Alloyed material modified by nanometer rare earth oxide, alloyed layer and preparation method thereof
  • Alloyed material modified by nanometer rare earth oxide, alloyed layer and preparation method thereof
  • Alloyed material modified by nanometer rare earth oxide, alloyed layer and preparation method thereof

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preparation example Construction

[0067] A method for preparing an alloyed layer, comprising the steps of:

[0068] Cut the Ti-6Al-4V plate into a certain volume of sample block, and use SiO 2 Grind the surface of the sample with sandpaper to remove the oxide skin on the surface of the sample, clean the sample with alcohol, and dry it for later use. The alloyed powder is directly pre-spread on the surface of the sample without adding a binder, and the thickness is controlled to be about 1 mm, and then laser alloyed. The laser process parameters are: laser power 3.5kW, scanning speed 300mm / min, spot diameter 3.5mm, argon flow rate 12L / min, overlap rate 30%, and thickness of pre-set powder 1mm.

[0069] The alloying powder is nickel-coated graphite powder or mixed powder of nickel-coated graphite powder and nano-NdO, n-Nd 2 o 3 The particle size range is 40-60nm. The pre-experiment uses nickel-coated graphite powder with different ratios of nickel and graphite. The influence of nickel and graphite content on...

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Abstract

The invention discloses an alloyed material modified by nano-rare earth oxide, an alloyed layer and a preparation method thereof. The alloyed cladding material includes nickel-coated graphite and nano-neodymium oxide, and the content of nano-neodymium oxide is 0.25-1.75wt .%, the balance is nickel-coated graphite. The prepared alloyed layer mainly contains TiC, γ-Ni, Ni 3 Al, NiTi, NiTi 2 And flake graphite and other phases, flake graphite can play a certain lubricating performance, reducing the friction coefficient of the alloyed layer. Nano neodymium oxide can refine the structure of the alloyed layer, making the internal structure of the alloyed layer more uniform and dense, which can effectively improve the microhardness of the alloyed layer, and nano neodymium oxide can also play a role in purifying the molten pool and reducing the alloying layer. The inclusions and pores of the alloyed layer improve the wear resistance of the alloyed layer.

Description

technical field [0001] The invention discloses a laser alloying material modified by nano-rare earth oxides, an alloyed layer and a preparation method thereof. Nickel-coated graphite powder is used as the alloying material, and nano-rare-earth oxides are used as additives, which are prepared under suitable process parameters. A self-lubricating alloying layer strengthened by multiple elements is formed, which significantly improves the hardness and wear resistance of the titanium alloy surface, and at the same time, the self-lubricating effect can be achieved because the alloying layer contains part of graphite. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Titanium all...

Claims

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Application Information

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IPC IPC(8): B22F1/02C22C19/03C22C1/10C22C1/05C23C24/10
CPCC22C19/03C22C1/05C23C24/103B22F1/17
Inventor 陈传忠路璐于慧君
Owner SHANDONG AGRI & ENG UNIV
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