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A Partial Particle Reinforcement Method of Aluminum Alloy Cylinder Liner

A particle reinforced, cylinder liner technology, applied in metal material coating process, furnace, heat treatment equipment and other directions, can solve the problems of short service life, poor heat resistance, poor wear resistance of cylinder liner, etc., to achieve enhanced refinement and distribution. Effects of uniformity, improved surface friction, and increased manufacturing costs

Active Publication Date: 2020-04-07
ZYNP GRP ANHUI CO LTD
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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 provide a local particle reinforcement method for an aluminum alloy cylinder liner, which solves the problem that the particle layer existing in the existing aluminum alloy cylinder liner cannot be refined and distributed unevenly, resulting in poor wear resistance and poor heat resistance of the cylinder liner and short service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The invention is a method for local particle reinforcement of an aluminum alloy cylinder liner, comprising the following steps:

[0027] S1. Melting the eutectic aluminum-silicon alloy with an electromagnetic heating furnace to remove gas and impurities in the eutectic aluminum-silicon alloy;

[0028] S2. Raise the temperature of the smelted eutectic aluminum-silicon alloy at a rate of 45°C / h until the temperature rises to 690°C;

[0029] S3. Pour the eutectic aluminum-silicon alloy heated to 690°C into the tundish, extend the ultrasonic horn below the surface of the melt in the tundish, vibrate ultrasonically for 2 minutes at 520W ultrasonic power, and keep the melt temperature at 570°C ;

[0030] S4. Pour the semi-solid slurry treated with ultrasonic vibration into a centrifugal casting molding mold preheated to 200°C, rotate for 15 minutes at a speed of 2000r / min, form, cool and solidify, and obtain local particle-reinforced aluminum in the inner layer Alloy cylind...

Embodiment 2

[0037] The invention is a method for local particle reinforcement of an aluminum alloy cylinder liner, comprising the following steps:

[0038] S1. Melting the eutectic aluminum-silicon alloy with an electromagnetic heating furnace to remove gas and impurities in the eutectic aluminum-silicon alloy;

[0039] S2. Raise the temperature of the smelted eutectic aluminum-silicon alloy at a rate of 70°C / h until the temperature rises to 690°C;

[0040] S3. Pour the eutectic aluminum-silicon alloy heated to 690°C into the tundish, extend the ultrasonic horn below the surface of the melt in the tundish, vibrate ultrasonically for 5 minutes at 550W ultrasonic power, and keep the melt temperature at 615°C ;

[0041] S4. Pour the semi-solid slurry treated by ultrasonic vibration into a centrifugal casting molding mold preheated to 280°C, rotate for 30 minutes at a speed of 2700r / min, form, cool and solidify, and obtain local particle-reinforced aluminum in the inner layer Alloy cylinder...

Embodiment 3

[0048] The invention is a method for local particle reinforcement of an aluminum alloy cylinder liner, comprising the following steps:

[0049] S1. Melting the eutectic aluminum-silicon alloy with an electromagnetic heating furnace to remove gas and impurities in the eutectic aluminum-silicon alloy;

[0050]S2. Raise the temperature of the smelted eutectic aluminum-silicon alloy at a rate of 95°C / h until the temperature rises to 690°C;

[0051] S3. Pour the eutectic aluminum-silicon alloy heated to 690°C into the tundish, extend the ultrasonic horn below the surface of the melt in the tundish, vibrate ultrasonically for 8 minutes at 580W ultrasonic power, and keep the melt temperature at 665°C ;

[0052] S4. Pour the semi-solid slurry treated by ultrasonic vibration into a centrifugal casting molding mold preheated to 350°C, rotate for 45 minutes at a speed of 3500r / min, form, cool and solidify, and obtain local particle-reinforced aluminum in the inner layer Alloy cylinder ...

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PUM

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Abstract

The invention discloses a local particle reinforcement method for an aluminum alloy cylinder sleeve. The local particle reinforcement method comprises the following steps: smelting a eutectic aluminum-silicon alloy, and removing gas and impurities; heating the eutectic aluminum-silicon alloy; pouring the eutectic aluminum-silicon alloy into a tundish, and vibrating the eutectic aluminum-silicon alloy through an ultrasonic amplitude transformer; pouring the eutectic aluminum-silicon alloy into a centrifugal casting forming die, centrifuging, forming, cooling and condensing, and then obtaining an inner-layer local particle-reinforced aluminum alloy cylinder sleeve blank; carrying out mechanical turning and preheating treatment on the cylinder sleeve blank; spraying the inner surface of a cylinder sleeve matrix; carrying out first-time aging treatment, rough machining and finish machining on the cylinder sleeve, wherein second-time aging treatment needs to be carried out before the finishmachining; and carrying out semi-finish honing and finish honing machining to obtain a finished cylinder sleeve product. According to the local particle reinforcement method, through sequential heating, supersonic vibration, heat treatment, spraying and surface treatment for the aluminum-silicon alloy, refining for a particle layer of the cylinder sleeve and the uniformity of distribution are improved, and meanwhile, the surface friction force of the aluminum alloy cylinder sleeve is increased, the heat resistance of the aluminum alloy cylinder sleeve is improved, and the service life of thealuminum alloy cylinder sleeve is prolonged.

Description

technical field [0001] The invention belongs to the technical field of cylinder liner processing, and relates to a local particle strengthening method of an aluminum alloy cylinder liner. Background technique [0002] The primary silicon grains of the hypereutectic aluminum-silicon alloy are relatively coarse, and after a period of use of the hypereutectic aluminum-silicon alloy cylinder liner, the wear of the inner hole is intensified, and a large gap is formed between the cylinder wall and the piston ring, causing the engine to run out of gas. The effective power increases, the oil consumption increases significantly, and the service life of the engine increases. Therefore, it is particularly important to develop and improve the structure of the inner surface of the cylinder liner to obtain an aluminum alloy cylinder liner with higher wear resistance and lower wear coefficient. [0003] At present, the aluminum alloy cylinder liner is prepared by centrifugal casting metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C21/02B22D13/00B22D1/00C23C4/06C23C4/134C21D9/00C22F1/043B23P15/00
CPCB22D1/00B22D13/00B23P15/00C21D9/0068C22C1/026C22C21/02C22F1/043C23C4/06C23C4/134
Inventor 黄德松王刚叶照辉江诚
Owner ZYNP GRP ANHUI CO LTD