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Self-lubricating copper-based abrasion-resistant alloy and preparation method thereof

A wear-resistant alloy, self-lubricating technology, applied in mechanical equipment, bearing components, shafts and bearings, etc., can solve the problems of low matrix strength, insufficient refinement of the structure, limiting the service life of bearing materials in internal combustion engines, etc., and improve the matrix strength. , The effect of improving self-lubrication and improving matrix hardness

Inactive Publication Date: 2013-09-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper-based alloys represented by ZCuPb15Sn8 meet the design requirements of bearing materials in internal combustion engines through fine lead phases. However, ZCuPb15Sn8 alloys still have the disadvantages of insufficient microstructure and low matrix strength, which limits the bearing materials in internal combustion engines. service life
Based on the above situation, this patent refines the structure of the dispersed phase and increases the strength of the matrix by adding combined rare earth metals and a new type of spray forming process, thereby improving the service life of bearing materials in internal combustion engines. The above improvements are currently available at home and abroad. No public reports yet

Method used

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  • Self-lubricating copper-based abrasion-resistant alloy and preparation method thereof
  • Self-lubricating copper-based abrasion-resistant alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 1510g Cu (purity 99.9%), 138g Sn (purity 99.9%), 256g lead (purity 99.9%), and 38g lanthanum-cerium mixed rare earth metal (model CGXT, manufacturer: Chenguang Xinte, Baotou City Metal LLC);

[0025] (2) Put the above raw materials into the intermediate frequency induction furnace in order for alloy pre-smelting, put Cu, Sn and lead first, add lanthanum cerium mixed rare earth metal after melting; the pre-smelting temperature is 1250 ℃, the pre-smelting time is 20min, Stir 6 times during the pre-smelting process to achieve complete mixing;

[0026] (3) Then use a supersonic atomizing nozzle to carry out the supersonic gas flow atomization deposition process of the alloy: the atomization gas is nitrogen, and the gas flow rate is 650L / min; the atomization deposition distance is 40cm; the atomization deposition is completed and the obtained A self-lubricating copper-based wear-resistant alloy.

[0027] First, sample the original bimetallic bearing material (ZCu...

Embodiment 2

[0030] (1) Weigh 1523g Cu (purity 99.9%), 144g Sn (purity 99.9%), 270g lead (purity 99.9%), 11g lanthanum cerium mixed rare earth metal (model CGXT, manufacturer: Baotou City Chenguang New Special Metals limited liability company);

[0031] (2) Put the above raw materials into the intermediate frequency induction furnace in order for alloy pre-smelting, first put Cu, Sn and lead, after melting, then add lanthanum cerium mixed rare earth metal; the pre-smelting temperature is 1230 ℃, the pre-smelting time 30min, stirring 10 times during the pre-smelting process to achieve complete mixing;

[0032] (3) Then use a supersonic atomization nozzle to carry out the supersonic gas flow atomization deposition process of the alloy: the atomization gas is argon, and the gas flow rate is 700L / min; the atomization deposition distance is 60cm; the atomization deposition is completed and the obtained A self-lubricating copper-based wear-resistant alloy described above.

[0033] The alloy ma...

Embodiment 3

[0037] (1) Weigh 1512g Cu (purity 99.9%), 140g Sn (purity 99.9%), 278g lead (purity 99.9%), and 32g lanthanum-cerium mixed rare earth metal (model CGXT, manufacturer: Chenguang Xinte, Baotou City Metal LLC);

[0038] (2) Put the above raw materials into the intermediate frequency induction furnace in order for alloy pre-smelting, put Cu, Sn and lead first, and then add combined rare earth metal after melting; the pre-smelting temperature is 1250°C, the pre-smelting time is 40min, The process is stirred 8 times to achieve complete mixing;

[0039] (3) Then use a supersonic atomization nozzle to carry out the supersonic gas flow atomization deposition process of the alloy: the atomization gas is a mixed gas of nitrogen and argon (mixing volume ratio is 1:1), and the gas flow rate is 1000L / min; atomization The deposition distance is 100 cm; the self-lubricating copper-based wear-resistant alloy is obtained after the atomization deposition is completed.

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Abstract

The invention relates to a self-lubricating copper-based abrasion-resistant alloy which consists of the following elements in percentage by weight: 75-85wt% of Cu, 5-8wt% of Sn, 0.5-2wt% of lanthanum-cerium misch metal and the balance of lead; and an alloy material is prepared by weighing the raw materials according to the proportion, subsequently pre-smelting the alloy in a medium-frequency induction furnace, and carrying out atomization and deposition by using spraying forming equipment. According to the alloy material, on the basis of the conventional ZCuPb15Sn8 cast alloy, by adopting the novel preparation process with the addition of rare earth elements and spraying deposition, the strength and the self-lubrication of a matrix are improved, and the abrasion resistance is remarkably improved.

Description

technical field [0001] The invention relates to a self-lubricating copper-based wear-resistant alloy and a preparation method thereof, belonging to the field of preparation of wear-resistant alloy materials. Background technique [0002] As one of the main power sources of equipment today, the internal combustion engine is the foundation of the country's industrialization development. The self-lubricating and wear-resistant materials of the bearings in the internal combustion engine are the key materials for the equipment to maintain long-term and high-speed operation, so the development and improvement of related wear-resistant materials has become an improvement. A top priority for device performance. [0003] At present, the structure of bearing wear-resistant materials is mainly composed of soft disperse phase distributed on a hard matrix. To improve the wear resistance of the material, the particle size and distribution of the disperse phase must be improved, and the pe...

Claims

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Application Information

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IPC IPC(8): C22C9/08C22C9/02C22C1/02F16C33/12
Inventor 严鹏飞严彪雷皓水露雨白云亮
Owner TONGJI UNIV
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