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A kind of powder metallurgy high-nickel alloy bearing material

An alloy bearing and powder metallurgy technology, which is applied in the field of alloy bearing manufacturing, can solve problems such as enhanced corrosion resistance, and achieve the effects of high corrosion resistance, improved wear resistance and reduced frictional resistance.

Active Publication Date: 2017-10-03
JIANGSU YINGQIU GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purpose of this patent is to improve the wear resistance and service life of the bearing, and does not enhance the corrosion resistance

Method used

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  • A kind of powder metallurgy high-nickel alloy bearing material
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  • A kind of powder metallurgy high-nickel alloy bearing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) 8% tin by weight, 5% composite graphite powder, 40% composite nickel powder, 2% phosphor copper powder, and the composition composed of all the other Cu is fully mixed;

[0024] (2) Pass the fully mixed powder above 350°C in a diffusion furnace, and carry out low-temperature diffusion under the protection of N gas, so that part of the metal is pre-alloyed;

[0025] (3) Put the above-mentioned mixed or low-temperature diffused powder into a mold for compression molding, and press it into a green compact with a pressure of 200MPa and a compression density of 6.2g / cm 3 ;

[0026] (4) Sintering treatment is a heat treatment performed below the melting point temperature of the main elements. The above-mentioned pressed compact is gradually sintered and heated for 1.0 hour in a N and H reducing atmosphere, and the temperature is raised to 400 ° C, and then the main sintering is heated to 850 ° C. ℃, keep the temperature for 1.5 hours, then gradually cool down to room tem...

Embodiment 2

[0029] (1) 9% by weight tin, 7% of composite graphite powder, 45% of composite nickel powder, 4% of phosphor bronze powder, the composition that all the other Cu forms is fully mixed;

[0030] (2) Pass the fully mixed powder above 400°C in a diffusion furnace, and carry out low-temperature diffusion under the protection of N gas, so that part of the metal is pre-alloyed;

[0031] (3) Put the above-mentioned mixed or low-temperature diffused powder into a mold and press it into a green compact with a pressure of 300 MPa and a pressing density of 6.3 g / cm 3 ;

[0032] (4) Sintering treatment is a heat treatment performed below the melting point temperature of the main elements. The above-mentioned pressed compact is gradually sintered and heated for 2 hours in a N and H reducing atmosphere, and the temperature is raised to 450 ° C, and then the main sintering is heated to 900 ° C. ℃, keep the temperature for 2.0 hours, then gradually cool down to room temperature after 1 hour, ...

Embodiment 3

[0035] (1) 11% by weight tin, 10% of composite graphite powder, 50% of composite nickel powder, 6% of phosphor bronze powder, and the composition that all the other Cu forms is fully mixed;

[0036] (2) Pass the above powder through 450°C in a diffusion furnace, and carry out low-temperature diffusion under the protection of N gas, so that part of the metal is pre-alloyed;

[0037] (3) Put the above-mentioned mixed or low-temperature diffused powder into a mold and press it into a green compact with a pressure of 400 MPa and a compression density of 6.4 g / cm 3 ;

[0038] (4) Sintering treatment is a heat treatment performed below the melting point temperature of the main elements. The above-mentioned pressed compact is gradually sintered and heated for 2.5 hours in a N and H reducing atmosphere, and the temperature is raised to 580 ° C, and then the main sintering is heated to 1000 ℃, keep the temperature for 3.0 hours, then gradually cool down to room temperature after 1.5 h...

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Abstract

The invention provides a powder metallurgy high-nickel alloy bearing manufacturing method. Firstly, 8-11% by weight of tin, 5-10% of composite graphite powder, 40-50% of composite nickel powder, 2-6% of phosphor bronze powder, and the rest are The composition composed of copper is fully mixed, and then diffused at low temperature under the protection of nitrogen, and then the above powder is placed in a mold for compression molding, and then heat treatment is carried out below the melting point temperature of the main element, and finally the sintered body after deburring is used The die is pressed and shaped to make it a pressed piece with a specified shape, specified density and specified dimensional accuracy. The material prepared by the invention reduces the frictional resistance when running on the surface of the inner diameter of the bearing, and reduces the mechanical sliding noise; the wear resistance is improved during the running of the bearing, and the service life exceeds 5000 hours, and the high-nickel alloy bearing material has corrosion resistance and wear resistance Higher, more suitable for fuel pump motor bearings for ethanol gasoline.

Description

technical field [0001] The invention relates to a method for manufacturing an alloy bearing, in particular to a method for manufacturing a powder metallurgy high-nickel alloy bearing. Background technique [0002] Ethanol gasoline is a new type of alternative energy that is formed by mixing fuel ethanol and ordinary gasoline processed from grain and various plant fibers in a certain proportion. As a new type of clean fuel, ethanol gasoline is the focus of the development of renewable resources in the world. However, ethanol produces acetic acid during combustion, which has a corrosive effect on automotive metals, especially copper. The fuel pump is installed in the fuel tank and immersed in the fuel. The bearing material of the fuel pump motor is copper-based, which is easily corroded by acetic acid, causing the bearing function to fail early, and eventually the life of the fuel pump cannot meet the design requirements (5000 hours). At present, graphite bearings are usuall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16B22F1/00C22C30/04C22C19/03
Inventor 王春官杨立新陈璐璐
Owner JIANGSU YINGQIU GRP CO LTD