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Method for preparing copper-based self-lubricating material through in-situ stirring method

A technology of self-lubricating materials and stirring method, which is applied in the field of preparing copper-based self-lubricating materials by in-situ stirring method, which can solve the problems of being easily polluted and achieve the effects of avoiding secondary pollution, good mechanical properties and simple operation

Active Publication Date: 2016-10-26
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned shortcomings of the existing preparation of self-lubricating materials, and to provide a method for preparing copper-based self-lubricating materials by in-situ stirring method. This method simplifies operations and reduces costs while improving the degree of freedom in material composition design , improve the compactness of the material, avoid the problem that the raw material is easily polluted, improve the bonding force between the reinforcing phase, the lubricating phase and the matrix copper, and at the same time ensure the uniformity of the large-sized homogeneous copper-based self-lubricating material ingot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of method for preparing copper-based self-lubricating material by in-situ stirring method is carried out according to the following steps:

[0048] Step 1. Copper-based melt centrifugation:

[0049] (1) Preparation of copper-based melt: take pure copper and heat and melt it in a heating furnace at a heating temperature of 1100°C to form a copper-based melt;

[0050] (2) Stirring: by central stirring, the stirring speed is 100rpm, so that the copper-based melt forms a centrifugal vortex flow;

[0051] Step 2. In situ reaction:

[0052] (1) Raw material preparation: Take Al powder as the raw material of the reinforcement phase, and B as the raw material of the lubricating phase 2 o 3 and TiO 2 , after mixing evenly, a mixed raw material is formed, wherein, by molar ratio, Al powder: B 2 o 3 : TiO 2 =6:1:3, by weight percentage, (Al powder+B 2 o 3 +TiO 2 ): 0.1wt%, the balance is pure copper;

[0053] (2) Injection feeding: the injection carrier gas is ar...

Embodiment 2

[0060] A kind of method for preparing copper-based self-lubricating material by in-situ stirring method is carried out according to the following steps:

[0061] Step 1. Copper-based melt centrifugation:

[0062] (1) Preparation of copper-based melt: take pure copper and heat and melt it in a heating furnace at a heating temperature of 1200°C to form a copper-based melt;

[0063] (2) Stirring: by central stirring, the stirring speed is 240rpm, so that the copper-based melt forms a centrifugal vortex flow;

[0064] Step 2. In situ reaction:

[0065] (1) Raw material preparation: Take Al powder as the raw material of the reinforcement phase, and B as the raw material of the lubricating phase 2 o 3 and TiO 2 , after mixing evenly, a mixed raw material is formed, wherein, by molar ratio, Al powder: B 2 o 3 : TiO 2 =7:2:3, by weight percentage, (Al powder+B 2 o 3 +TiO 2 ): 5.5wt%, the balance is pure copper;

[0066] (2) Injection feeding: the injection carrier gas is ar...

Embodiment 3

[0073] A kind of method for preparing copper-based self-lubricating material by in-situ stirring method is carried out according to the following steps:

[0074] Step 1. Copper-based melt centrifugation:

[0075] (1) Preparation of copper-based melt: take pure copper and heat and melt it in a heating furnace at a heating temperature of 1300°C to form a copper-based melt;

[0076] (2) Stirring: by central stirring, the stirring speed is 400rpm, so that the copper-based melt forms a centrifugal vortex flow;

[0077] Step 2. In situ reaction:

[0078] (1) Raw material preparation: Take Al powder as the raw material of the reinforcement phase, and B as the raw material of the lubricating phase 2 o 3 and TiO 2 , after mixing evenly, a mixed raw material is formed, wherein, by molar ratio, Al powder: B 2 o 3 : TiO 2 =8:1:2, by weight percentage, (Al powder+B 2 o 3 +TiO 2 ): 10wt%, the balance is pure copper;

[0079] (2) Injection feeding: the injection carrier gas is arg...

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Abstract

The invention belongs to the technical field of high-performance materials, and relates to a method for preparing a copper-based self-lubricating material through an in-situ stirring method. The method specifically comprises the steps that copper-based melt is made to form vortex flow in a heating furnace in a stirring manner; a raw material forming a wild phase or a lubricating phase is added into the copper-based melt in a blowing manner; the raw material forming the wild phase or the lubricating phase and the copper-based melt generate the wild phase and the lubricating phase in situ under the action of the vortex flow, and the wild phase and the lubricating phase are rolled into the copper-based melt; and the wild phase and the lubricating phase are distributed in the copper-based melt highly evenly and dispersedly in an eccentric stirring manner and a quick cooling solidification manner. According to the method, the preparation process of the copper-based self-lubricating material is simplified in an in-situ generation manner, the interface bonding force of a second phase and a matrix is improved, and the self-lubricating copper-based alloy material with the wild phase and the lubricating phase distributed highly dispersedly is achieved through the means of eccentric stirring, solidification control and the like.

Description

Technical field: [0001] The invention belongs to the technical field of high-performance materials, and in particular relates to a method for preparing copper-based self-lubricating materials by an in-situ stirring method. Background technique: [0002] Friction phenomena are ubiquitous. According to statistics, about 1 / 3 to 1 / 2 of the world's energy consumption is finally manifested as friction loss in various ways. The economic loss caused by friction loss is huge. It is estimated that only abrasive wear is Make industrial countries lose 1% to 4% of their gross national product. Wear due to friction is one of the main causes of mechanical failure. Statistical analysis shows that the main cause of mechanical failure is not the fracture of components, but the tribological damage of moving linkages and mechanical parts. It can be seen that the problem of material wear is very important, and it plays a decisive role in the development of the national economy. Therefore, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/10C22C32/00
CPCC22C1/1036C22C9/00C22C32/0005C22C32/0089C22C1/1052
Inventor 张廷安豆志河吕国志田宇楠关录奎刘燕张伟光傅大学牛丽萍
Owner NORTHEASTERN UNIV
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