Instrument grade composite material for complex components and preparation method thereof
A technology of composite materials and instruments, which is applied in the field of complex component instrument grade composite materials and its preparation, can solve problems such as cracking, achieve the effects of cost reduction, significant economic benefits, and elimination of internal stress
Active Publication Date: 2020-10-13
HARBIN INST OF TECH
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- 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-grade aluminum-based composite material through quenching and thermal shock, and provides an instrument-grade composite material for complex components and its preparation method
Method used
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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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Abstract
An instrument grade composite material for complex components and a preparation method thereof. The invention relates to the field of preparation of aluminum alloy materials, in particular to an instrument grade composite material for complex components and a preparation method thereof. The invention aims to solve the problem of cracking caused by the release of internal stress during the heat treatment process of the existing instrument grade aluminum-based composite material through quenching and thermal shock. It is composed of a SiC reinforcement and an aluminum alloy base through extrusion casting; the volume fraction of the SiC reinforcement is 40-60%. The method is as follows: 1. Prefabricated body preparation; 2. Matrix aluminum alloy melting; 3. Squeeze casting; 4. Heat treatment. The present invention adopts a novel solid-solution strengthened aluminum alloy as an instrument-grade composite material. The heat treatment process of the composite material does not need to go through quenching and other cold and heat shock processes, eliminating the risk of quenching cracking. The complex component instrument-grade composite material prepared by the present invention is suitable for Manufacture of 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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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