Method for preparing in-situ Al matrix composite

An aluminum matrix composite material, in-situ technology, applied in the field of materials, can solve the problems of high residual stress cracks and holes, reduce material fatigue strength, plasticity and toughness, insufficient reliability, etc., to improve laser absorption rate, inhibit recrystallization, etc. The effect of growing, expanding the range of applications
CN110512111AInactive Publication Date: 2019-11-29SHANGHAI JIAOTONG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI JIAOTONG UNIV
Publication Date
2019-11-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing an in-situ Al matrix composite. The method comprises the following steps: adding a high-temperature covering agent into pure Al and carrying out smelting, so as to obtain a melt; adding KBF4 and KTiF6 into the melt, and carrying out uniform mixing for a reaction; and after a by-product is removed, sequentially adding an Al-Cu intermediate alloy, an Al-Zr intermediate alloy, an Al-Sc intermediate alloy, an Al-Mn intermediate alloy, an Al-Ti intermediate alloy and pure Mg, adding a harmless Al alloy refining agent, and sequentially carrying out degassing refining and gas atomization at 700-850 DEG C, so as to obtain in-situ synthesized TiB2 particle reinforced Al-Cu-Mg composite powder. Through the method disclosed by the invention, the Al matrix composite powder which can achieve high laser absorptivity and high particle sphericity is prepared; furthermore, the technological operation is simple and easy, the cost is low, and the efficiencyis high; and the method is suitable for mass production.
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Description

technical field

[0001] The invention relates to a method for preparing an in-situ aluminum-based composite material, which belongs to the field of material technology. Background technique

[0002] In recent years, the rapid development of weapons manufacturing, aerospace and other high-end equipment fields has put forward more and more stringent requirements on the performance and preparation of materials: in addition to high specific stiffness and specific modulus, structural materials must also have high plasticity. and high strength. At present, large-scale aircraft and other equipment manufacturing industries are increasingly demanding large-scale, precise, and complex-structured light-weight, high-strength and tough alloys to meet their needs for high performance, high reliability, high economy, and high environmental protection. Laser additive manufacturing technology can well deal with the key technical problems in the above-mentioned high-end manufacturing fields s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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