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Local granule reinforced piston and its manufacture method

A particle reinforcement and piston technology, which is applied to pistons, machines/engines, mechanical equipment, etc., can solve the problems of local reinforcement parts falling off, rapid performance changes, complex process, etc., to achieve low manufacturing cost, increase wear resistance, and process simple effect

Inactive Publication Date: 2010-06-02
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above locally reinforced pistons need to prepare prefabricated blocks or composite piston components in the locally reinforced area in advance. The whole process is complicated and the cost is high. Possibility of partial reinforcement falling off, causing potential safety hazard

Method used

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  • Local granule reinforced piston and its manufacture method
  • Local granule reinforced piston and its manufacture method
  • Local granule reinforced piston and its manufacture method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The reinforcement particles at the interface between the reinforcement region and the transition layer are greater than or equal to 10% by volume; the reinforcement particles are SiC ceramic reinforcement particles with a particle size of 10-50 μm, and the piston base material is aluminum or aluminum-based alloy.

Embodiment 2

[0025] The reinforcing particles at the interface between the reinforcing region and the transition layer are 20% by volume; the reinforcing particles are SiC ceramic reinforcing particles with a particle size of 10-50 μm, and the volume percent of reinforcing particles at the interface between the reinforcing region and the transition layer in this embodiment is The thermal expansion performance of the reinforced area of ​​the piston, the wear resistance and the overall tensile performance of the piston are better than those of the first embodiment.

Embodiment 3

[0027] The reinforcing particles at the interface between the reinforcing area and the transition layer are 25% by volume; the reinforcing particles are SiC ceramic reinforcing particles with a particle size of 10-50 μm, and the volume percentage of the reinforcing particles at the interface between the reinforcing area and the transition layer in this embodiment is The thermal expansion performance of the reinforced area of ​​the piston, the wear resistance and the overall tensile performance of the piston are better than those of the second embodiment.

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Abstract

The present invention discloses a partial reinforced particle piston and a manufacturing method thereof. The partial reinforced particle piston comprises a head, a skirt section and a pin base. The head comprises a piston top and a ring slot part. The piston top and the ring slot part are reinforced areas which are formed by distributing reinforced particles in piston matrix material. The skirt section is an non-reinforced area. The reinforced area and the non-reinforced area are combined by an alloy combination form. The partial reinforced particle piston not only increases the wearing resistance of the head of a piston and reduces the thermal expansion coefficient, but also ensures the good mechanical performance of the skirt section of the piston and realizes the continuous transition of the organization structure and performance of the partial reinforced area and the non-reinforced area; the effective power of an engine is improved; the service life of the piston is prolonged; in order to manufacturing the piston, the present invention uses a centrifugal casting method to assemble the reinforced particles in melted homogenous composite material at the head of the piston, and the manufacturing method has simple technology and low manufacturing cost.

Description

technical field [0001] The invention relates to an engine cylinder component, in particular to a partially particle-reinforced piston and a manufacturing method thereof. Background technique [0002] The piston is an important part of the engine. The mechanical and thermal properties of the piston have an important impact on the working efficiency, service life and working state of the engine. With the further awareness of energy saving and environmental protection, engine pistons have higher requirements in terms of strength, wear resistance, high precision, low expansion and light weight, and then pistons made of aluminum alloys and other materials with low density appear. , in order to increase the strength and heat resistance of the aluminum piston with a lower density, the structure of the piston is developed in the direction of composite combination. [0003] In order to solve the problems of the wear resistance and high temperature performance of the piston, the stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/00B22D13/00B22D15/02
Inventor 刘昌明王开李富强邹茂华
Owner CHONGQING UNIV
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