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Heat-resistant metal matrix embedded solid self-lubricating bearing and preparation method thereof

A solid self-lubricating and solid-lubricating technology, applied in the field of materials science, can solve problems such as incompatibility

Inactive Publication Date: 2015-07-08
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a heat-resistant metal-based solid self-lubricating bearing and its preparation method. The temperature-resistant metal-based solid self-lubricating bearing and its preparation method solve the problem There is a technical problem that metal-based inlaid solid self-lubricating bearings are not suitable for working in harsh environments with high temperatures and high loads

Method used

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  • Heat-resistant metal matrix embedded solid self-lubricating bearing and preparation method thereof
  • Heat-resistant metal matrix embedded solid self-lubricating bearing and preparation method thereof
  • Heat-resistant metal matrix embedded solid self-lubricating bearing and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] Embodiment 1, the solid lubricating material of embedded bearing

[0023] Based on polytetrafluoroethylene (PTFE), add (5-40)% graphite powder + (5-60)% pure copper powder solid composite lubricant, as shown in Table 1.

[0024] Table 1 The relationship between the friction coefficient μ and pv value of polytetrafluoroethylene (PTFE)-based solid lubricating materials and temperature

[0025]

Embodiment 2

[0026] Embodiment 2, the metal matrix material of embedded bearing

[0027] According to the requirement that the bearing capacity of the trial-produced bearing is greater than 90MPa, aluminum brass ZCuZn25A16Fe3Mn3 is selected as the metal matrix material of the bearing, and its chemical composition is shown in Table 2 and 3.

[0028] Table 2 Tested inlaid bearing metal matrix materials

[0029]

[0030] Table 3 Composition of inlaid bearing base material (aluminum brass) (mass fraction of chemical composition %)

[0031]

[0032] Ultimate dynamic load: 100 MPa ; Basic hardness: HB210~270 Friction coefficient μ: <0.16 Maximum operating temperature: 300°C; Maximum sliding speed: Dry friction: 0.4m / s Oil lubrication: 5m / s

Embodiment 3

[0033] Example 3, Preparation of metal-based inlaid solid self-lubricating bearing

[0034] A. Rough machining: According to the required bearing specifications, select castings or forgings, rough machining to the rough machining size range required by the bearing;

[0035] B. Drilling: On the rough-machined bearing base, drill through holes or blind holes according to the size of the solid lubrication cylinder to be inlaid. The sum of the surface connections of the holes accounts for 15-25% of the inner wall area of ​​the bearing (depending on the lubrication requirements and the bearing. depending on the workload).

[0036] ① Bearing inner diameter ≤ Φ160mm, drill a through hole between the inner and outer walls of the bearing.

[0037] ② Bearing inner diameter >Φ160mm, drill blind holes between the inner and outer walls of the bearing.

[0038] C. Heat treatment: According to the requirements of use, quenching and tempering or quenching treatment is carried out to make ...

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Abstract

The invention discloses a heat-resistant metal matrix embedded solid self-lubricating bearing, which is prepared by taking aluminium brass as a bearing metal matrix material, a solid lubricating material is embedded at the periphery of the matrix material, and the solid lubricating material is composed of the following components in percentage by mass: 35-90% of polytetrafluoroethylene, 5-40% of crystalline graphite powder, and 5-60% of copper powder. The invention also provides a preparation method of the heat-resistant metal matrix embedded solid self-lubricating bearing. The bearing surface load of the metal matrix embedded solid self-lubricating bearing reaches more than 90 MPa; the working temperature can reach 300 DEG C; the friction coefficient is less than 0.20 in the process of normal running; and the pv value is over 5.0 (MPa.m / s), and the bearing can be effectively adsorbed on a metal matrix so as to achieve self-lubrication.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a bearing, in particular to a heat-resistant metal-based embedded solid self-lubricating bearing and a preparation method thereof. Background technique [0002] The metal-based solid self-lubricating bearing does not need to add lubricant during use, but relies on the solid lubricating material embedded on the metal base to transfer between the friction pairs to form a lubricating film and realize self-lubrication. Therefore, it can adapt to the working environment with harsh working environment, heavy dust, difficult lubricating oil and cooling, and its working life is longer than that of ordinary sliding bearings. Therefore, the product has been widely used in metallurgical continuous casting machines, rolling equipment, mining machinery, ships, steam turbines , Water turbines, injection molding machines and equipment production lines. At present, the metal-based in...

Claims

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Application Information

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IPC IPC(8): F16C33/10F16C33/16F16C33/20F16C33/14
Inventor 魏立群卢冬华戴志方肖壮徐军
Owner SHANGHAI INST OF TECH