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Bearing material obtained through loose sintering and having ultralow porosity and manufacturing method thereof

A technology of bearing material and manufacturing method, which is applied in the field of bearing materials, can solve the problems of unsatisfactory anti-fatigue strength and mechanical properties, and achieve the effect of meeting human health and environmental protection requirements, high mechanical strength, and excellent anti-fatigue performance

Pending Publication Date: 2018-08-10
ZHEJIANG CHANGSHENG SLIDING BEARINGS
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, since the porosity of the bushing materials produced by most manufacturers is greater than 1%, and the maximum pore size is also greater than 0.050mm, the fatigue resistance and mechanical properties are not ideal.

Method used

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  • Bearing material obtained through loose sintering and having ultralow porosity and manufacturing method thereof
  • Bearing material obtained through loose sintering and having ultralow porosity and manufacturing method thereof
  • Bearing material obtained through loose sintering and having ultralow porosity and manufacturing method thereof

Examples

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Embodiment 1

[0065] Compared with Comparative Example 1 and Comparative Example 2, in Example 1, under the premise of the same ratio of different particle sizes, the mesh size of the small-particle spherical powder is reduced, so that the pores between the loosely packed spherical powders with larger particle sizes are closed. Smaller particle sizes for maximum packing, see image 3 . The porosity of the sintered body in Example 1 is reduced to below 1%, and the maximum size of a single pore is only 35um. With the decrease of the particle size ratio, the porosity and the maximum size of a single pore of the sintered body decrease rapidly. Experiments have proved that the mixture of copper alloy particles in the loose state is not pressed, but only through the matching and mixing of copper alloy particles of different meshes, a relatively dense sintered body can be obtained after sintering. Due to the high cost of the pressing equipment and the relatively complicated pressing process, espe...

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Abstract

The invention discloses a bearing material obtained through loose sintering and having the ultralow porosity and a manufacturing method thereof. The bearing material comprises, by weight, 70-85% of -140+200-mesh copper alloy particles and 15-30% of -600-mesh copper alloy particles, thus has the ultralow porosity and pore size, and achieves the high mechanical strength and the excellent anti-fatigue performance, and thus the bearing material having the ultralow porosity can be preferably used for manufacturing a connecting rod bushing and the like of an engine. Because of lead-free copper alloysintering, human health and environmental protection requirements are met.

Description

technical field [0001] The invention relates to the field of bearing materials, in particular to a bearing material with ultra-low porosity obtained through loose sintering and a manufacturing method thereof. Background technique [0002] Sliding bearings are based on high-quality carbon steel and sintered with bronze powder on the surface. They are suitable for swinging and rotating motions under heavy loads and low speeds. They have the characteristics of low friction coefficient, good wear resistance, long service life and good anti-seizure performance. Various forms of oil grooves, oil storage pits, oil pockets, etc. can be processed on the surface of the copper alloy according to the needs of the working conditions, so as to be suitable for occasions where it is impossible or difficult to refuel. It can be widely used in mining institutions, automobiles, construction machinery, agricultural machinery, and steel rolling institutions, etc. [0003] Sliding materials sint...

Claims

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Application Information

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IPC IPC(8): B22F3/11B22F7/04C22C9/00
CPCC22C9/00B22F3/11B22F7/04B22F2007/042
Inventor 薛庆云孙志华陆忠泉
Owner ZHEJIANG CHANGSHENG SLIDING BEARINGS
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