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Heatproof anti-wear self-lubrication material and preparation method thereof

A self-lubricating material, heat-resistant technology, applied in the field of powder metallurgy, can solve the problems of long process route, self-lubricant burning loss is not well solved, etc.

Inactive Publication Date: 2013-11-20
CHINA IRON & STEEL RES INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process solves the segregation of the self-lubricating agent to a certain extent and maintains good self-lubricating performance, the burning loss of the self-lubricating agent is not well solved, and the process route is also long

Method used

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  • Heatproof anti-wear self-lubrication material and preparation method thereof
  • Heatproof anti-wear self-lubrication material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First weigh 1Kg of copper-clad iron composite metal powder (mass ratio of copper to iron is 1:1), 1Kg of nickel-coated graphite composite powder (mass ratio of nickel to graphite is 3:7), 1Kg of nickel-coated molybdenum disulfide composite powder (The mass ratio of nickel and molybdenum disulfide is 3:7) 1Kg, metal molybdenum powder 0.1Kg, dispersion strengthened metal iron powder 7Kg (containing 1% Al 2 o 3 ), the particle size of the above powders is -100 mesh, and then they are added to the V-shaped mixer for thorough mixing, the mixed powder is put into the mold, and finally the mold filled with the powder is put into the spark plasma sintering equipment (SPS ), using the following process conditions for sintering: temperature 950°C, pressure 10MPa, heat preservation and pressure holding time 5 minutes. After the sintering was completed, it was released when it was cooled below 200°C. The physical and mechanical properties of the prepared self-lubricating material ...

Embodiment 2～4

[0018] The process is the same as in Example 1, except that the ratio of raw materials and the SPS sintering process conditions are changed, and the specific parameters are shown in Table 2. The physical and mechanical performance test results of the self-lubricating materials prepared accordingly are shown in Table 1.

[0019] Table 1 Physical and Mechanical Properties of Examples 1-4 Samples

[0020]

[0021] Table 2 Raw material ratio and SPS sintering process conditions of Examples 1-4

[0022]

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Abstract

The invention relates to a heatproof anti-wear self-lubrication material and a preparation method thereof, and belongs to the technical field of powder metallurgy solid self-lubrication materials. The self-lubrication material comprises, by mass, 10-20% of copper-clad iron composite metal powder, 10-20% of nickel-coated graphite composite powder, 3-10% of nickel-coated molybdenum disulfide composite powder, 1-3% of metal molybdenum powder and the balance dispersion strengthening metal iron powder containing 1% of Al2O3. The raw materials are uniformly mixed after proportioned and then filled in a grinding tool to be subjected to spark plasma sintering to obtain the material. The method has the advantages that physical and mechanical properties of the prepared solid self-lubrication material are reflected in that hardness is greater than or equal to HRC20, compressive strength is 1100-1200MPa, and dry friction coefficient with steel is 0.1-0.2 at the room temperature and 0.15-0.22 at the temperature of 500 DEG C.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a heat-resistant and anti-wear self-lubricating material and a preparation method thereof, which are suitable for making heat-resistant and anti-wear bearings, friction pair partners, advanced sealing rings and other components in the fields of metallurgy, machinery, and chemical industry . Background technique [0002] At present, there are mainly three types of iron-based self-lubricating materials. The first type is oil-immersed. The material has a certain porosity and is lubricated by an oil film, and its strength and service temperature are low; the second is non-oil-immersed. Usually It needs to add a certain amount of low-melting point metals, but the amount of alloying elements and solid lubricants is limited. In addition, it is made by ordinary sintering process, so the density is low, resulting in poor service temperature, lubricity and wear resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/105
Inventor 李一柳学全李楠丁存光李发长李金普褚可桢薛昌恒
Owner CHINA IRON & STEEL RES INST GRP
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