Complex component instrument-level composite material and preparation method thereof

A technology of composite materials and components, which is applied in the field of complex component instrument grade composite materials and its preparation, can solve problems such as cracking, and achieve the effects of reducing costs, ensuring quality, and excellent comprehensive performance

Active Publication Date: 2019-03-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem of cracking caused by the release of internal stress during the heat treatment process of the existing instrument-grad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0018] Specific implementation mode 1: In this embodiment, an instrument-grade composite material for complex components is composited by extrusion casting of SiC reinforcement and aluminum alloy matrix; the volume fraction of SiC reinforcement in the instrument-grade composite material for complex components is 40- 60%.

specific Embodiment approach 2

[0019] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the SiC reinforcement is SiC ceramic particles with a particle size of 6-10 μm, D 50 = 8 μm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0020] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the aluminum alloy matrix is ​​composed of 4%-8% Mg, 0.7%-1.2% Mn, 0.1%-0.6% Cu, 0.01% % to 0.5% Fe, 0.01% to 0.5% Ti and the rest are composed of Al. Others are the same as those in Embodiment 1 or 2.

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PUM

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Abstract

The invention discloses a complex component instrument-level composite material and a preparation method thereof, and relates to the field of aluminum alloy material preparation, in particular to thecomplex component instrument-level composite material and the preparation method thereof. The problem that in the quenching and cold-hot impact process of the heat treatment process of an existing instrument-level aluminum-based composite material, cracking is caused by internal stress releasing is solved. The complex component instrument-level composite material is prepared from a SiC reinforcement body and an aluminum alloy matrix through squeeze casting in a composite mode, and the volume fraction of the SiC reinforcement body is 40%-60%. The method comprises the steps of 1 prefabricated body preparing, 2 matrix aluminum alloy smelting, 3 squeeze casting and 4 heat treating. According to the complex component instrument-level composite material and the preparation method thereof, the novel solid solution enhanced aluminum alloy is adopted for instrument-level composite material preparation, the cold-hot impact process such as quenching is not needed in the heat treatment process ofthe composite material, and the quenching cracking risk is eliminated; and the complex component instrument-level composite material prepared through the method is suitable for manufacturing high-precision complex structural parts.

Description

technical field [0001] The invention relates to the field of preparation of aluminum alloy materials, in particular to instrument grade composite materials for complex components and a preparation method thereof. Background technique [0002] The accuracy of inertial navigation, positioning system, satellite imaging system, etc. is a key factor in determining the combat capability and survivability of weapons and equipment. To this end, guidance accuracy and stability must be further improved. Gyroscopes, accelerometers, infrared guidance mirrors, etc. are the core equipment for precision guidance, and their accuracy determines the hit accuracy of the weapon system. [0003] Reducing assembly is a means of increasing the overall structural accuracy, however it also complicates the structure. When using instrument-grade aluminum matrix composites, there is a large thermal mismatch stress between the interface between the reinforcement and the base alloy due to the large the...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C21/00C22C29/06C22F1/04C22F1/00
CPCC22C1/1015C22C1/1036C22C21/00C22C29/06C22F1/00C22F1/04C22C1/1073
Inventor 姜龙涛武高辉池海涛陈国钦修子扬张强芶华松康鹏超杨文澍
Owner HARBIN INST OF TECH
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