Piston material containing cobalt and preparation method thereof

A piston and raw material technology, which is applied in the field of cobalt-containing piston materials and its preparation, can solve the problems of low high-temperature strength and powerlessness, and achieve the effect of improving high-temperature thermal stability and high-temperature strength

Inactive Publication Date: 2018-07-10
安徽浩丰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, aluminum ingots, one of the main raw materials of domestic piston manufacturers, are mostly eutectic aluminum-silicon ZL108 or ZL109. The mechanical properties and casting flow properties of this material meet the general needs, but its high-temperature...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of cobalt-containing piston material of the present embodiment comprises the following raw materials in parts by weight: 160 parts of aluminum powder, 20 parts of silicon powder, 2 parts of magnesium powder, 2 parts of copper powder, 2 parts of hafnium powder, 3 parts of nickel, chromium 3 parts, 3 parts cobalt.

[0025] The piston material has a tensile strength of 80MPa at a high temperature of 300°C, a tensile strength of 75MPa at a high temperature of 350°C, and a volume stability of 0.018%. Moreover, the anti-friction effect of the piston material is more conventional than conventional The eutectic aluminum silicon material is increased by 15%, and the product life is increased by 10%.

Embodiment 2

[0027] A kind of cobalt-containing piston material of the present embodiment comprises the following raw materials in parts by weight: 200 parts of aluminum powder, 30 parts of silicon powder, 4 parts of magnesium powder, 4 parts of copper powder, 4 parts of hafnium powder, 5 parts of nickel, chromium 5 parts, cobalt 5 parts.

[0028] The piston material has a tensile strength of 80MPa at a high temperature of 300°C, a tensile strength of 75MPa at a high temperature of 350°C, and a volume stability of 0.018%. Moreover, the anti-friction effect of the piston material is more conventional than conventional The eutectic aluminum silicon material is increased by 15%, and the product life is increased by 10%.

Embodiment 3

[0030] A kind of cobalt-containing piston material of the present embodiment comprises the following raw materials in parts by weight: 180 parts of aluminum powder, 25 parts of silicon powder, 3 parts of magnesium powder, 3 parts of copper powder, 3 parts of hafnium powder, 4 parts of nickel, chromium 4 parts, 4 parts cobalt.

[0031] The piston material has a tensile strength of 90MPa at a high temperature of 300°C, a tensile strength of 85MPa at a high temperature of 350°C, and a volume stability of 0.014%; and, through anti-fatigue and wear tests, the anti-friction effect of the piston material is more conventional The eutectic aluminum silicon material is increased by 15%, and the product life is increased by 10%.

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Abstract

The invention discloses a piston material containing cobalt, and further discloses a preparation method of the piston material containing cobalt. The piston material containing cobalt comprises the following raw materials of, by weight, 160-200 parts of aluminum powder, 20-30 parts of silica powder, 2-4 parts of magnesium powder, 2-4 parts of copper powder, 2-4 parts of hafnium powder, 3-5 parts of nickel, 3-5 parts of chrome and 3-5 parts of cobalt. The preparation method of the piston material containing cobalt comprises the following steps that the raw materials of the piston material are weighed correspondingly by weight; the raw materials of the piston material are subjected to ball-milling, pass through a screening net after ball-milling is conducted, and are mixed, and a mixed raw material is obtained; the mixed raw material is poured into a mold, the mold is placed in a vacuum environment for high-temperature smelting, and after cooling is conducted, the piston material containing cobalt is obtained. The piston material containing cobalt and the preparation method thereof have the advantages that alloy elements which have a greater influence on high-temperature performanceare added according to a certain proportion to adjust the proportion, so that the high-temperature strength and the high-temperature thermal stability of the material are improved, and finally the piston material containing cobalt is obtained, wherein the piston material has high-temperature tensile resistance, thermal corrosion resistance, fatigue resistance and abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a cobalt-containing piston material 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. [0003] At present, aluminum ingots, one of the main raw materials of domestic piston manufacturers, are mostly eutectic aluminum-silicon ZL108 or ZL109. The mechanical properties and casting flow properties of this material meet the general needs, but its high-temperature strength is low: at a high temperature of 300°C , the tensile strength is only 69-85MPa, and the volume stabilit...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02
CPCC22C21/02C22C1/026
Inventor 杨浩
Owner 安徽浩丰实业有限公司
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