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Lead-free copper-based bimetallic wear-resistant material and preparation method thereof

A wear-resistant material, lead-free copper-based technology, applied in the field of lead-free copper-based bimetal wear-resistant materials and their preparation, can solve the problems of poor interface bonding quality, poor wettability, and disappearance of lubrication, and achieve improved mechanical and Tribological properties, improve wear resistance, improve the effect of bonding strength

Inactive Publication Date: 2018-07-27
无锡神意模具新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, graphite, hexagonal boron nitride and copper substrate have poor wettability, poor interface bonding quality, pores at the interface junction, and severe matrix splitting, which weakens the mechanical and tribological properties of the material; molybdenum disulfide is easy to oxidize and Decomposition, not only the lubricating effect disappears, but also reduces the sintering effect

Method used

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  • Lead-free copper-based bimetallic wear-resistant material and preparation method thereof
  • Lead-free copper-based bimetallic wear-resistant material and preparation method thereof
  • Lead-free copper-based bimetallic wear-resistant material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0034] A method for preparing a lead-free copper-based bimetallic wear-resistant material. The lead-free copper-based bimetallic wear-resistant material is prepared by powder metallurgy.

[0035] Further options are:

[0036] The preparation process of the powder metallurgy method is as follows: steel plate shearing blanking-coarsening-powder spreading-initial firing-initial rolling-re-firing-re-rolling;

[0037] in:

[0038] Powder spreading: Mix the powders of the corresponding components into alloy powder according to the mass percentage, and evenly spread it on a clean and roughened steel plate, and the thickness of the powder spreading is 1.5-4mm;

[0039] First burning: in the ammonia decomposition atmosphere N 2 、H 2 Sintering under protected conditions, the sintering temperature is 800-920°C, and the heat preservation is 20-50min;

[0040] Initial rolling: double-roll rolling the bimetallic wear-resistant material after initial firing, the rolling amount is 0.2-0.5...

Embodiment example

[0045] This implementation case is implemented according to the following steps:

[0046] (1) Weigh the following materials according to the mass percentage in Table 1 and mix them uniformly.

[0047] Table 1 Composition of mixed powder

[0048]

[0049](2) Steel preparation, select high-quality carbon steel plate of SPCC type, cut the large steel plate into 2.5*126*625mm, remove oil and rust, change the rolling to 2*126*780mm, and roughen the surface.

[0050] (3) Preparation of bimetallic bearing materials:

[0051] Powder spreading: spread the mixed powder evenly and flatly on a clean roughened steel plate, the thickness of the powder spreading is 1.5mm;

[0052] Initial firing: sintering under the protective conditions of N2 and H2 in an ammonia decomposition atmosphere, the sintering temperature is 880°C, and the temperature is kept for 30 minutes;

[0053] Preliminary rolling and leveling: put the first sintered material on the cold rolling mill for rolling to a th...

Embodiment 2

[0058] This implementation case is implemented according to the following steps:

[0059] (1) Weigh the following materials according to the mass percentage in Table 2 and mix them uniformly.

[0060] Table 2 Composition of mixed powder

[0061]

[0062] The preparation method of this embodiment is the same as that of Example 1.

[0063] Using the friction test conditions described in Example 1, the friction and wear test results are: the friction coefficient is 0.15, and the wear scar depth is 0.085 mm.

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Abstract

The invention discloses a lead-free copper-based bimetallic wear-resistant material and a preparation method thereof. According to the lead-free copper-based bimetallic wear-resistant material and thepreparation method thereof, copper-plated molybdenum disulfide, copper-plated graphite and copper-plated hexagonal boron nitride are added into lead-free bronze powder, alloy powder is laid on a steel plate, the copper-steel bimetallic lead-free wear-resistant composite material is prepared through a powder metallurgy re-sintering and re-rolling technology, and the effects of antifriction and wear resistance of the molybdenum disulfide, the graphite and the hexagonal boron nitride are exerted in a synergistic mode. The obtained composite material has the advantages of being good in antifriction and wear resistance performance, excellent in mechanical property, free of toxic element of lead, pollution-free to the environment and suitable for industries of medicine, food, machinery and thelike.

Description

technical field [0001] The invention relates to the field of lead-free copper-based anti-friction and wear-resistant materials, in particular to a lead-free copper-based bimetal wear-resistant material composed of a composite anti-friction component, a composite wear-resistant component and a copper alloy matrix and a preparation method thereof. Background technique [0002] In the prior art, lead is widely used in copper-based sliding bearing materials and copper-based anti-friction and wear-resistant materials due to its soft quality, low melting point, and good anti-friction and anti-adhesion properties. It is a kind of harmful substance, which has serious harm to human body and environment. At present, developed countries such as Europe and the United States have imposed strict restrictions on the use of lead. [0003] Both molybdenum disulfide and graphite are good solid lubricants. The layered crystal structure of graphite and its good adsorption capacity make it hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04B22F1/00B22F3/10B22F3/18C22C9/00C22C9/06C22C32/00
CPCB22F7/04B22F1/0003B22F3/1007B22F3/18B22F2998/10C22C9/00C22C9/06C22C32/00
Inventor 尹延国孙君军沈羽王忠俊刘辰
Owner 无锡神意模具新材料有限公司
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