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Manufacturing method of sliding bearing

A sliding bearing, weight percentage technology, used in metal processing equipment, transportation and packaging, etc., can solve the problems of insufficient wear resistance, high thermal expansion coefficient, high friction coefficient, reduce friction coefficient, reduce thermal expansion coefficient, and improve wear resistance. the effect of strength

Inactive Publication Date: 2016-11-09
宁波市鄞州新华仪表电机配件厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Compared with rolling bearings, the existing sliding bearings have seriously hindered their development due to factors such as high friction coefficient, insufficient wear resistance, and high thermal expansion coefficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1) Mixing, mixing the following powder materials by weight percentage and then grinding them into powders with an average particle size of less than 8 microns: graphite 0.8-1.2%, montmorillonite 0.015-0.035%, chromium 0.1-0.15%, Molybdenum disulfide 0.2-0.3%, bismuth 0.01-0.05%, copper 0.3-0.5%, boron 0.02-0.03%, dysprosium 0.001-0.003%, zinc stearate 0.3-0.45%, and the balance is iron; The way of dysprosium-iron alloy containing 15% dysprosium is added;

[0013] 2) Pressing, using one or more filling methods, pressing in the mold with a pressure of 600-750MPa for 130-260 seconds;

[0014] 3) Sintering, first pre-sintering at 600-800°C for 1-2 hours, then shaping in the mold under a pressure of 150-200MPa, and then sintering at 1100-1250°C for 1-3 hours, and then cooling down in two stages, The cooling rate in the first stage is kept at 2.5-3.5°C / min, and tempered when the temperature drops to 400-450°C, and then naturally cooled to 200±20°C and immersed in hot oil wit...

Embodiment 2

[0016] 1) Mixing, mixing the following powder materials by weight percentage and then grinding them into powders with an average particle size of less than 8 microns: graphite 0.8%, montmorillonite 0.015%, chromium 0.15%, molybdenum disulfide 0.3%, Bismuth 0.01-0.05%, copper 0.5%, boron 0.03%, dysprosium 0.001%, zinc stearate 0.45%, the balance is iron;

[0017] 2) Pressing, using one or more filling methods, pressing in the mold with a pressure of 750MPa for 260 seconds;

[0018] 3) Sintering, first pre-sintering at 800°C for 1-2 hours, then shaping in the mold under 200MPa pressure, and then sintering at 1250°C for 3 hours, and then cooling down in two stages, the cooling rate of the first stage is kept at 2.5°C / min, tempering treatment when the temperature drops to 450°C, then naturally cool to 200±20°C and immerse in hot engine oil with an oil temperature of 130°C.

Embodiment 3

[0020] 1) Mixing, mixing the following powder materials by weight percentage and then grinding them into powders with an average particle size of less than 8 microns: graphite 0.9%, montmorillonite 0.025%, chromium 0.12%, molybdenum disulfide 0.2%, Bismuth 0.03%, copper 0.3%, boron 0.02%, dysprosium 0.001%, zinc stearate 0.3%, the balance is iron.

[0021] 2) Pressing, using one or more filling methods, pressing in the mold with a pressure of 600MPa for 260 seconds;

[0022] 3) Sintering, first pre-sintering at 600°C for 2 hours, then shaping in the mold under 150MPa pressure, and then sintering at 1250°C for 1 hour, and then cooling down in two stages, the cooling rate of the first stage is kept at 3.5°C / minute, tempering treatment when the temperature drops to 450°C, and then immerse in hot oil with an oil temperature of 130°C when it is naturally cooled to 200±20°C; it is measured that the average hardness of the bearing surface of this embodiment can reach 350-362HB , a...

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Abstract

The invention discloses a manufacturing method of a sliding bearing. The manufacturing method comprises the following specific step: (1) mixing materials, wherein the following powder materials are mixed and then milled into powder with the average particle diameter small than 8 micrometers, and the powder materials comprise, by weight percent, 0.8%-1.2% of graphite, 0.015%-0.035% of montmorillonite, 0.1%-0.15% of chromium, 0.2%-0.3% of molybdenum disulfide, 0.01%-0.05% of bismuth, 0.3%-0.5% of copper, 0.02%-0.03% of boron, 0.001%-0.003% of dysprosium, 0.3%-0.45% of zinc stearate and the balance iron. The sliding bearing manufactured according to the manufacturing method has the advantages of being low in friction coefficient, high in wear resistance, low in thermal expansion coefficient and capable of achieving oil-free lubrication.

Description

technical field [0001] The invention relates to a preparation method of a sliding bearing. Background technique [0002] Compared with rolling bearings, existing sliding bearings have a high coefficient of friction, insufficient wear resistance, and high thermal expansion coefficients, which seriously hinder their development. In some parts with low speed and low load requirements, sliding bearings have the advantages of small mass and stable structure, especially developed in combination with the characteristics of oil-free lubrication, and have low friction coefficient, high wear resistance, and low thermal expansion coefficient. Sliding bearings without oil lubrication are of great practical significance. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above shortcomings of the prior art: to provide a method for preparing a sliding bearing with low friction coefficient, high wear resistance, low thermal ...

Claims

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Application Information

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IPC IPC(8): B22F3/02B22F3/10B22F3/26B22F1/00B22F5/10C22C38/18C22C38/16C22C38/60
CPCC22C38/002C22C38/005C22C38/16C22C38/18C22C38/32C22C38/60B22F3/02B22F3/10B22F3/26B22F5/106B22F1/105
Inventor 李波
Owner 宁波市鄞州新华仪表电机配件厂
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