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Preparation method of high-strength piston material of automobile diesel engine

An automotive diesel engine and high-strength technology, which is applied in the field of auto parts processing, can solve the problems of low high-temperature strength of aluminum-silicon alloys, achieve the effects of ensuring structural strength and structural stability, and improving high-temperature strength and high-temperature thermal stability

Inactive Publication Date: 2016-07-13
SUZHOU RISING AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature strength of aluminum-silicon alloy is low. In order to improve the high-temperature performance of the alloy, it is necessary to improve the composition and preparation process of the piston material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of a high-strength piston material for an automobile diesel engine in this embodiment, the chemical composition and mass percentage composition of the piston material: 24.5% samarium, 6.5% bismuth, 52% aluminum, 7.5% palladium, and the rest is iron.

[0020] The preparation method of the present embodiment comprises the steps:

[0021] 1.1 Batching: weigh the ingredients according to the mass percentage content of the above-mentioned element powders;

[0022] 1.2 Ball milling and mixing: the ingredients described in step 1.1 are ball milled, and the ball milled mixture is passed through a 100-mesh sieve;

[0023] 1.3 The sieved mixture is molded to obtain a compact;

[0024] 1.4 Put the above-mentioned green compact into the vacuum chamber and rush into the protective gas for ion bombardment, then heat up and sinter;

[0025] 1.5 In the vacuum chamber, heat up at a heating rate of 15-20°C / min, raise the temperature to 1180°C and keep it warm for...

Embodiment 2

[0028] The preparation method of a high-strength piston material for an automobile diesel engine in this embodiment, the chemical composition and mass percentage composition of the piston material: 26% samarium, 8% bismuth, 56% aluminum, 8% palladium, and the rest is iron.

[0029] The preparation method of the present embodiment comprises the steps:

[0030] 1.1 Batching: weigh the ingredients according to the mass percentage content of the above-mentioned element powders;

[0031] 1.2 Ball milling and mixing: the ingredients described in step 1.1 are ball milled, and the ball milled mixture is passed through a 100-mesh sieve;

[0032] 1.3 The sieved mixture is molded to obtain a compact;

[0033] 1.4 Put the above-mentioned green compact into the vacuum chamber and rush into the protective gas for ion bombardment, then heat up and sinter;

[0034] 1.5 In the vacuum chamber, heat up at a heating rate of 15-20°C / min, raise the temperature to 1180°C and keep it warm for 2 hou...

Embodiment 3

[0037] The preparation method of a high-strength piston material for an automobile diesel engine in this embodiment, the chemical composition and mass percentage composition of the piston material: 24.8% samarium, 6.8% bismuth, 54.2% aluminum, 7.5% palladium, and the rest is iron.

[0038] The preparation method of the present embodiment comprises the steps:

[0039] 1.1 Batching: weigh the ingredients according to the mass percentage content of the above-mentioned element powders;

[0040] 1.2 Ball milling and mixing: the ingredients described in step 1.1 are ball milled, and the ball milled mixture is passed through a 100-mesh sieve;

[0041] 1.3 The sieved mixture is molded to obtain a compact;

[0042] 1.4 Put the above-mentioned green compact into the vacuum chamber and rush into the protective gas for ion bombardment, then heat up and sinter;

[0043] 1.5 In the vacuum chamber, heat up at a heating rate of 15-20°C / min, raise the temperature to 1180°C and keep it warm f...

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Abstract

The invention discloses a preparation method of a high-strength piston material of an automobile diesel engine.The piston material is prepared from, by mass, samarium 24.5%-26%, bismuth 6.5%-8%, aluminum 52%-56%, palladium 7.5%-12% and the balance iron.

Description

technical field [0001] The invention belongs to the technical field of auto parts processing, and in particular relates to a high-strength piston material for an automobile diesel engine and a preparation method thereof. Background technique [0002] In order to reduce energy consumption, reduce air pollution, and improve the efficiency of internal combustion engines, increasing the combustion temperature has become an important development trend of internal combustion engines. Correspondingly, higher requirements are put forward for the high temperature strength and high temperature wear resistance of internal combustion engine accessories. Aluminum-silicon alloy has a small thermal expansion coefficient, high wear resistance and light weight, and is the most common piston material. However, the high-temperature strength of aluminum-silicon alloy is low. In order to improve the high-temperature performance of the alloy, it is necessary to improve the composition and prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/04
CPCC22C21/003C22C1/0416
Inventor 岳胜桥龚达锦吴海峰郑福新
Owner SUZHOU RISING AUTO PARTS
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