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Strontium-containing composite piston material and preparation method thereof

A piston and raw material technology, which is applied in the field of strontium-containing composite piston materials and its preparation, can solve the problems of high load, high density, and high-temperature-resistant aluminum alloys that are difficult to meet the needs, and achieve high-temperature strength, wear resistance, and high-temperature strength. Good, the effect of improving strength and wear resistance

Inactive Publication Date: 2018-07-13
安徽宝泰汽车部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of trucks, railway locomotives and marine engines towards high power, high load and strict emission requirements, the existing high temperature resistant aluminum alloys have become more and more difficult to meet the needs
However, the density of cast iron and cast steel is too high to meet the comprehensive performance requirements of modern high-efficiency engines for pistons

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A strontium-containing composite piston material of the present embodiment comprises the following raw materials in parts by weight: 11 parts of silicon powder, 0.5 part of magnesium powder, 0.05 part of titanium powder, 0.2 part of strontium powder, 8 parts of silicon carbide powder, molybdenum disulfide 5 parts, 0.3 parts of hafnium powder, and 75 parts of aluminum powder; wherein, silicon carbide powder is 300 mesh, and molybdenum disulfide is 305 mesh.

Embodiment 2

[0029] A strontium-containing composite piston material in this embodiment includes the following raw materials in parts by weight: 15 parts of silicon powder, 0.8 part of magnesium powder, 0.09 part of titanium powder, 0.7 part of strontium powder, 12 parts of silicon carbide powder, molybdenum disulfide 7 parts, 0.6 parts of hafnium powder, and 85 parts of aluminum powder; wherein, silicon carbide powder is 310 mesh, and molybdenum disulfide is 325 mesh.

Embodiment 3

[0031] A strontium-containing composite piston material in this embodiment includes the following raw materials in parts by weight: 13 parts of silicon powder, 0.65 part of magnesium powder, 0.07 part of titanium powder, 0.45 part of strontium powder, 10 parts of silicon carbide powder, molybdenum disulfide 6 parts, 0.45 parts of hafnium powder, and 80 parts of aluminum powder; wherein, silicon carbide powder is 305 mesh, and molybdenum disulfide is 315 mesh.

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PUM

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Abstract

The invention discloses a strontium-containing composite piston material. The strontium-containing composite piston material comprises, by weight part, 11-15 parts of silicon powder, 0.5-0.8 part of magnesium powder, 0.05-0.09 part of titanium powder, 0.2-0.7 part of strontium powder, 8-12 parts of silicon carbide powder, 5-7 parts of molybdenum disulfide, 0.3-0.6 part of hafnium powder and 75-85parts of aluminum powder. The invention further discloses a preparation method of the strontium-containing composite piston material. The preparation method comprises the steps of 1, weighing raw materials; 2, conducting ball milling, sieving and mixing on the silicon powder, the magnesium powder, the titanium powder, the strontium powder, the hafnium powder and the aluminum powder; 3, conductingheating and heat preservation on the silicon carbide powder, and making the silicon carbide powder react with oxygen completely, so that silicon dioxide is formed on a surface layer; and 4, conductingheating, degassing and heat preservation on the mixed raw materials, then lowering the temperature, subsequently adding the molybdenum disulfide and silicon carbide, and conducting stirring. According to the strontium-containing composite piston material and the preparation method thereof, alloy elements which produce great influence on the high temperature performance and the wear resistance areadded according to certain ratios, and the mixing ratios are adjusted, so that the high temperature strength and wear resistance of the material are improved.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a strontium-containing composite piston material and a preparation method thereof. Background technique [0002] The piston is called the heart of the engine. It bears continuous alternating mechanical loads and thermal loads during the working process of the engine. It is a key part of the engine with the worst working conditions. Since the piston works under the condition of high temperature, high pressure and high speed, the material used for the piston must have high high temperature strength and good wear resistance to maintain the stable working efficiency of the engine. [0003] The main piston materials currently used are high temperature resistant aluminum alloys, cast iron and cast steel materials. Among them, high temperature resistant aluminum alloy is the most widely used. However, with the development of trucks, railway locomotives and marine engines towards...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C32/00C22C1/10
CPCC22C1/1036C22C21/02C22C32/0063C22C1/1047
Inventor 赵永
Owner 安徽宝泰汽车部件有限公司
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