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Self-lubricating high-wear-proof hypereutectic Al-Si alloy

An aluminum-silicon alloy and high wear-resistant technology, which is applied in the field of casting alloys, can solve problems such as increasing costs, reducing friction coefficients, and increasing processes, so as to achieve good wear reduction and service life, improve mechanical properties and wear resistance, and improve Effect of room temperature and high temperature performance

Inactive Publication Date: 2007-06-06
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the above shortcomings, after people use A390 alloy to make parts, they also need to carry out surface treatment, such as anodizing or tin plating, in order to reduce the friction coefficient and enhance the wear resistance, which increases the process, correspondingly increased cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 4.14kg Cu, 17.6kg Si, 3.7kg Bi, 73.62kg Al and other metals into the melting furnace. These metals are of high purity and suitable for alloying. After the metal element is melted, it is modified by adding P-Sr-Ba-RE composite modifier, and finally a billet with a diameter of 72mm is obtained by continuous casting. This blank is analyzed by a spectrometer, and the composition analysis results of the sample obtained from the alloy prepared by the invention are listed in Table 1, and compared with the composition of the traditional A390. Table 2 compares the mechanical properties between the alloy of the present invention and the traditional A390 alloy after T6 heat treatment.

[0020] Composition (wt%)

Cu

Mg

Si

Fe

mn

Ni

P

Bi

P

Sr

RE

Ba

Al

Alloy of the invention

4.14

0.20

17.60

0.29

0.10

0.30

0.01

3.70

0.01

0.01

0.02

0.02...

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PUM

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Abstract

A self-lubricating antiwear over-eutectic AlSi alloy contains Cu (3-5 Wt%), Si (17.1-20), Fe (0.2-0.5), Bi (2.5-5), Ni (0.2-0.5), P (0.005-0.02), Sr (0.005-0.05), Ba (0.01-0.4), RE (0.005-0.25), Mg (0-0.2), Mn (0-0.5), impurities (0-0.05) and Al (rest). Its advantages are high mechanical performance including elongation percentage, antiwear nature, tension strength, yield strength and hardness, and high machinability.

Description

technical field [0001] The invention relates to a self-lubricating and highly wear-resistant hypereutectic aluminum-silicon alloy, which belongs to the technical field of casting alloys. Background technique [0002] The two-way swash plate is a key part in the compressor to drive the piston back and forth to achieve refrigeration compression. This part not only ensures sufficient strength under high-speed rotation, but also its slope must have good wear resistance and friction reduction (low friction coefficient). During the working process, lubricant should be continuously provided to the friction surface of the swash plate, otherwise, the phenomenon of seizure will occur between the friction metals. On the other hand, in order to reduce the weight of automobiles, low-density metals are widely used, but even metals have strong wear resistance and low density. If their machinability is poor, the cost of production increases. Some materials, such as cast iron and bronze, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02
Inventor 毛协民姚奕张金龙樊灵杨虎魏霓鲁鑫
Owner SHANGHAI UNIV