Silver-containing nickel-based lubricating material with surface micropore hard template and preparation method

A surface microporous, lubricating material technology, applied in metal material coating technology, manufacturing tools, welding equipment, etc., can solve the problem of high wear rate of soft lubricating film on the friction surface, serious lubricant consumption, uncontrollable lubricant release, etc. problems, to achieve the effect of improving hardness and wear resistance

Inactive Publication Date: 2009-09-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In short, the disadvantages of the existing technology are that the release of lubricant cannot be controlled, which leads to serious consumption of lubricant, and the wear rate of the soft lubricating film on the friction surface is high due to the lack of support of the hard template

Method used

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  • Silver-containing nickel-based lubricating material with surface micropore hard template and preparation method
  • Silver-containing nickel-based lubricating material with surface micropore hard template and preparation method
  • Silver-containing nickel-based lubricating material with surface micropore hard template and preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0017] A kind of preparation method of the silver-containing nickel-based lubricating material with surface microporous hard template of the present invention comprises the following steps:

[0018] (1) Mix the metal powder in a ball mill; the composition and mass percentage of the metal powder are: Ni: 46.2% to 63.6%; Cr: 11.5% to 15.9%; W: 9.0% to 15.0%; Al : 2.0%~6.0%; Ti: 3.0%~8.0%; Ag: 5.0%~10.0%; CeO 2 : 1.0~4.0%; the ball milling speed is 150~200r / min, and the ball milling time is 20~30min.

[0019] (2) After compacting the mixed powder in a steel mold, put it into a graphite mold for vacuum hot pressing; during the hot pressing process, the vacuum degree is 2×10 -5 ~8×10 -5 Pa, the protective atmosphere is nitrogen, the temperature is 1200-1240°C, the positive pressure is 12-16MPa, and the heat preservation and pressure holding time is 20-30min.

[0020] (3) The material after hot pressing is finely ground and polished, and then put into a metal infiltrating furnace...

Embodiment 1

[0024] Example 1: According to the composition and mass percentage of metal powder: Ni: 46.2%, Cr: 15.9%, W: 15.0%, Al: 6.0%, Ti: 5.9%, Ag: 10.0%, CeO 2 : 1.0%, the particle size of the powder is 2-20 μm, the powder is weighed and blended, and the speed is 150r / min on a ball mill, and the ball mill is mixed for 30 minutes.

[0025] After the fully mixed powder is compacted in a steel mold, it is then loaded into a graphite mold and hot-pressed in a FVPHP-R-10 vacuum hot-pressing furnace. Vacuum the hot press furnace to 2×10 -5 Pa, then fill with nitrogen protection, heat up to 1200°C at a rate of 20°C / min, apply a pressure of 16MPa after reaching the temperature, and then keep warm for 30min.

[0026] The hot-pressed material was finely ground and polished to Ra=0.02-0.04 μm, and ultrasonically cleaned with acetone for 3 minutes. In a 15KW double-glow plasma metal infiltration furnace, carry out Mo infiltration treatment on silver-containing nickel-based materials, and vacuu...

Embodiment 2

[0033] Example 2: According to the composition and mass percentage of metal powder: Ni: 63.6%, Cr: 11.4%, W: 9.0%, Al: 2.0%, Ti: 3.0%, Ag: 10.0%, CeO 2 : 1.0%, the particle size of the powder is 2-20 μm, the powder is weighed and mixed, and the ball mill is mixed for 30 minutes at a speed of 150 r / min on a ball mill.

[0034] After the fully mixed powder is compacted in a steel mold, it is then loaded into a graphite mold and hot-pressed in a FVPHP-R-10 vacuum hot-pressing furnace. Vacuum the hot press furnace to 2×10 -5 Pa, then fill with nitrogen protection, heat up to 1240°C at a rate of 20°C / min, apply a pressure of 12MPa after reaching the temperature, and then keep warm for 30min.

[0035] The hot-pressed material was finely ground and polished to Ra=0.02-0.04 μm, and ultrasonically cleaned with acetone for 3 minutes. In a 15KW double-glow plasma metal infiltration furnace, carry out Mo infiltration treatment on silver-containing nickel-based materials, and vacuumize t...

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Abstract

The invention discloses a silver-containing nickel-based lubricating material with a surface micropore hard template, which uses nickel alloy as a substrate and contains a silver lubricating phase; and the surface of the material is provided with the micropore hard template capable of controlling the release of a lubricating agent and improving the hardness and abrasion resistance. A method for preparing the silver-containing nickel-based lubricating material with the surface micropore hard template comprises the following steps: firstly, mixing metal powder in a ball mill; secondly, compacting the mixed powder in a steel die, and then putting the compacted powder into a graphite die to carry out vacuum hot-pressing and molding; thirdly, finely grinding and polishing the hot-pressed material, and then putting the material into a metallic cementation furnace to carry out molybdenum cementation treatment; fourthly, putting the material subjected to the molybdenum cementation treatment into a nitriding furnace to carry out nitriding; and finally, etching micropores on the surface of the material subjected to the nitriding treatment by using pulse laser. The material limits sliver dispersing to the surface through the hard template, and uses micropores as a silver dispersing passage so as to control the release of the lubricating agent and improve the hardness and abrasion resistance; and the preparation method is simple and practical.

Description

technical field [0001] The invention relates to a lubricating material and a preparation method, in particular to a silver-containing nickel-based lubricating material with a surface microporous hard template and a preparation method. Background technique [0002] With the rapid development of industry and cutting-edge technology, many mechanical equipment need to work under extreme and harsh conditions. For example, the friction pairs of aviation and aerospace machinery often work in the environment of high vacuum, atomic oxygen, strong radiation and alternating temperature. Under such working conditions, conventional lubricating greases have serious problems such as radiation degradation, vacuum volatilization, and atomic oxygen erosion failure. Soft metals are suitable for some extreme working conditions as solid lubricants. [0003] There have been few reports on the design of sweating alloys or cermets using soft metals as lubricants. Liu Zuomin impregnated the Ag-Cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C19/05C22C1/08C23C12/00B23K26/38B23K26/362B23K26/382
Inventor 熊党生李建亮董佳龙洪洋
Owner NANJING UNIV OF SCI & TECH
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