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Copper alloy base self-lubricating composite material and preparation method thereof

A composite material and copper alloy technology, applied in the field of materials, can solve the problems of reducing the mechanical properties of materials, crushing strength, density and hardness, and wear resistance of materials, and achieve good self-lubricating properties and high wear resistance. Effect

Inactive Publication Date: 2013-02-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a competitive relationship between the high wear resistance and high self-lubricating properties of materials prepared by powder metallurgy, that is, the improvement of high self-lubricating properties is based on the increase in the proportion of solid lubricating phase in the material. When increasing the solid lubricating phase When the ratio is high, the mechanical properties of the material tend to be reduced, the crushing strength, density and hardness are reduced, and the wear resistance of the material is reduced.

Method used

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  • Copper alloy base self-lubricating composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] Prepare a copper alloy-based self-lubricating composite material, its chemical composition is Ni10%, Sm 2 o 3 1%, MoS 2 1%, Ag1%, CaF 2 1%, Al 2 o 3 2%, W3%, nickel-plated graphite 3%, ZQSn663 tin bronze powder (the chemical composition in ZQSn663 tin bronze powder is Zn5%, Sn5%, Pb2%, copper 88% by mass percentage) 78%, its properties are shown in Table 1 Shown, the preparation method is as follows:

[0036] (1) Mixing: Use a barrel to mix the powder on the mixer. The speed of the mixer is 400r / min. Steel balls and springs are added to the barrel to form the abrasive, so that the volume ratio of the abrasive to the metallurgical composite powder is 7. : 1, it is conducive to stirring and uniform mixing; wherein the compound powder mixing for metallurgy is carried out according to the following steps:

[0037] (a) Weigh Ni and Sm respectively 2 o 3 、MoS 2 , Ag, CaF 2 、Al 2 o 3 , W, nickel-plated graphite and ZQSn663 tin bronze powder for use, the weighing am...

Embodiment 2

[0044] Prepare a copper alloy-based self-lubricating composite material, its chemical composition is Ni10%, Sm 2 o 3 1%, MoS 2 1%, Ag1%, CaF 2 1%, Al 2 o 3 2%, W 3%, nickel-plated graphite 3%, copper-plated carbon fiber (diameter 1μm) 1.1%, ZQSn663 tin bronze powder (the chemical composition in ZQSn663 tin bronze powder is Zn5%, Sn5%, Pb2%, copper 88%) 76.9%, its properties are shown in Table 1, and its preparation method is as follows:

[0045] (1) Mixing: Use a barrel to mix the powder on the mixer. The speed of the mixer is 400r / min. Steel balls and springs are added to the barrel to form the abrasive, so that the volume ratio of the abrasive to the metallurgical composite powder is 7. : 1, it is conducive to stirring and uniform mixing; wherein the compound powder mixing for metallurgy is carried out according to the following steps:

[0046] (a) Weigh Ni and Sm respectively 2 o 3 、MoS 2 , Ag, CaF 2 、Al 2 o 3 , W, nickel-plated graphite, copper-plated carbon fi...

Embodiment 3

[0054] Prepare a copper alloy-based self-lubricating composite material, its chemical composition is Ni10%, Sm 2 o 3 1%, MoS 2 1%, Ag1%, CaF 2 1%, Al 2 o 3 2%, W 3%, nickel-plated graphite 3%, copper-plated carbon fiber (diameter 1μm) 1.6%, ZQSn663 tin bronze powder (the chemical composition in ZQSn663 tin bronze powder is Zn5%, Sn5%, Pb2%, copper 88%) 76.4%, its properties are shown in Table 1, and the preparation method is as follows:

[0055] (1) Mixing: Use a barrel to mix the powder on the mixer. The speed of the mixer is 400r / min. Steel balls and springs are added to the barrel to form the abrasive, so that the volume ratio of the abrasive to the metallurgical composite powder is 7. : 1, it is conducive to stirring and uniform mixing; wherein the compound powder mixing for metallurgy is carried out according to the following steps:

[0056] (a) Weigh Ni and Sm respectively 2 o 3 、MoS 2 , Ag, CaF 2 、Al2 o 3 , W, nickel-plated graphite, copper-plated carbon fibe...

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Abstract

The invention belongs to the technical field of materials, and particularly relates to a copper alloy base self-lubricating composite material and a preparation method thereof. The composite material comprises the following chemical components in percentage by mass: 9-10% of Ni, 0.5-1% of Sm2O3, 0.5-1% of MoS2, 0-1% of Ag, 0-2% of CaF2, 1-2% of Al2O3, 0-3% of W, 1-3% of nickel-plated graphite, 1.1-3.0% of copper-plated carbon fiber, 0-2.8% of pore forming agent NH4HCO3 and the balance of ZQSn663 tin bronze powder. The preparation method comprises the following steps: mixing the components, pressing to obtain a sample, sintering, performing hot dipping with composite PTFE (polytetrafluoroethylene), and drying to prepare the composite material. Through a method combining powder metallurgy sintering and composite hot dipping and hole sealing technologies, the novel copper alloy base composite self-lubricating material which has high strength, high wear resistance and self-lubricating property can be prepared in an environment-friendly and low-cost way. By regulating and controlling the components and technologies, the density of the prepared copper alloy base composite self-lubricating material is 4.71-6.54 g / cm<3>, the hardness is 30-58 HV, the crushing strength is 99-222 MPa, and the friction coefficient is 0.15-0.06, thereby meeting the requirements for self-lubricating materials of friction bushings under different working conditions.

Description

[0001] technical field [0002] The invention belongs to the field of material technology, in particular to a copper alloy-based self-lubricating composite material and a preparation method thereof. Background technique [0003] Friction parts in mechanical equipment occupy a large proportion in the industrial structure and have a great impact on social and economic development. The lubrication of friction parts in the working process is the key to improving the life of parts and ensuring the normal operation of mechanical equipment. Lubrication is the most effective measure to reduce friction and wear. The general method is to use lubricating oil or grease. Under certain conditions, parts are generally not easy to use lubricating oil or grease for lubrication. With the sharp increase in the operating speed and load of modern machines and mechanisms, as well as the requirements for safety, hygiene and oil pollution prevention in sewing, food, pharmaceutical and other indust...

Claims

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Application Information

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IPC IPC(8): C22C49/02C22C49/14C22C47/14C22C101/10
Inventor 陈岁元刘常升梁京李新荣安迪
Owner NORTHEASTERN UNIV
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