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Lead-free copper-based sliding bearing material and preparation method thereof

A sliding bearing, lead-free copper-based technology, applied in the field of lead-free materials, can solve the problems of poor ductility, anti-friction, weak anti-adhesion performance, etc., to improve wettability, increase interface bonding strength, and improve anti-adhesion properties Effect

Active Publication Date: 2017-03-29
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Introducing the element bismuth into the copper-based bearing material can also reduce friction and anti-adhesion. However, the hardness of bismuth is slightly higher than that of lead, and the ductility is also slightly worse than that of lead, so its anti-friction and anti-adhesion properties are weaker than lead.

Method used

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  • Lead-free copper-based sliding bearing material and preparation method thereof
  • Lead-free copper-based sliding bearing material and preparation method thereof
  • Lead-free copper-based sliding bearing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The quality of a single sample of the lead-free copper-based sliding bearing material of the present embodiment is 44g, and the composition of each raw material by weight percentage is as shown in Table 1:

[0029] Table 1 Raw material composition of lead-free copper-based sliding bearing materials

[0030] Element nickel tin iron bismuth phosphorus Molybdenum disulfide copper Content (wt%) 1 8 2 3 0.3 2 margin

[0031] The preparation method of lead-free copper-based sliding bearing material comprises the steps:

[0032] (1) each raw material is carried out batching according to the weight percentage of table 1;

[0033] (2) The method of electroless plating is adopted to form a copper coating on the surface of molybdenum disulfide powder, and the plating solution formula is as follows:

[0034] CuSO 4 ·5H 2 O 10g / L, C 4 h 4 KNa·4H 2 O 50g / L, HCHO: 30g / L; pH=12.

[0035] (3) Add copper, tin, and bismuth into the intermedi...

Embodiment 2

[0046] The preparation method, plating solution formulation, performance testing method and conditions of the lead-free copper-based sliding bearing material in this example are the same as those in Example 1, except that the composition of each raw material by weight percentage is shown in Table 3. The mechanical and friction and wear properties of the obtained materials are shown in Table 4.

[0047] Table 3 Raw material composition of lead-free copper-based sliding bearing materials

[0048] Element nickel tin iron bismuth phosphorus Molybdenum disulfide copper Content (wt%) 1 7 1 3 0.3 4 margin

[0049] Table 4 Performance tests of lead-free copper-based sliding bearing materials

[0050]

Embodiment 3

[0052]The preparation method, performance testing method and conditions of the lead-free copper-based sliding bearing material in this example are the same as in Example 1, except that the composition of each raw material by weight percentage is shown in Table 5, and the formulation of the plating solution is shown in Table 6. The mechanical and friction and wear properties of the obtained materials are shown in Table 7.

[0053] Table 5. Raw material composition of lead-free copper-based sliding bearing materials

[0054] Element nickel tin iron bismuth phosphorus Molybdenum disulfide copper Content (wt%) 1 8 1 3 0.4 5 margin

[0055] Table 6 Plating solution formula

[0056]

[0057] Table 7 Performance tests of lead-free copper-based sliding bearing materials

[0058]

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Abstract

The invention discloses a lead-free copper-based sliding bearing material and a preparation method thereof. The raw materials comprises nickel, tin, iron, bismuth, molybdenum disulfide, phosphorus and cooper, the cooper serves as base materials, cooper-plated molybdenum disulfide and the bismuth serve as lubricating components, and lead in a bearing is replaced by a synergistic effect of the molybdenum disulfide and the bismuth; a cooper plating layer is formed on the surface of the molybdenum disulfide through a chemical plating effect, so that a combining effect of the molybdenum disulfide and the cooper base is improved, and decomposing does not happen in sintering; and the bismuth has antifriction and antiadhesion effects, the cooper-tin-bismuth powder is subjected to atomization treatment, and the situation that the brittle phase bismuth falls off from the base body is effectively avoided. According to the lead-free copper-based sliding bearing material, antifriction and antiadhesion performance is good, mechanical performance is excellent, the lead-free copper-based sliding bearing material can be used in the fields of food machinery, medicine machinery, engineering machinery and the like, and broaden application prospects are achieved.

Description

technical field [0001] The invention relates to a lead-free material, more specifically a lead-free copper-based sliding bearing material and a preparation method thereof. Background technique [0002] Lead has the characteristics of soft and easy to deform, low melting point, and good boundary lubrication properties. It is widely used as an important component of copper-based sliding bearing materials. For example, Cu-10Sn-10Pb and Cu-3Sn-24Pb are the most common automotive engines. Bearing materials, lead-containing copper-based sliding bearing materials have good anti-friction, anti-adhesion and other characteristics. However, lead and its compounds are highly toxic substances, and the use of lead-containing products will bring non-negligible harm to the human living environment. For copper-based sliding bearing materials, how to maintain good anti-friction and anti-adhesion properties under lead-free conditions is particularly important. [0003] Molybdenum disulfide w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/02C22C1/04
CPCC22C1/0425C22C9/02
Inventor 尹延国曾庆勤张国涛田明
Owner HEFEI UNIV OF TECH
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