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Preparation method for in-situ aluminum-based composite material

An aluminum-based composite material and 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, and low yield of parts, so as to improve laser absorption rate and suppress Effect of recrystallization growth and improvement of material strength

Inactive Publication Date: 2018-10-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prepared parts are prone to high residual stress and defects such as micron-level cracks and holes, thereby reducing the fatigue strength, plasticity and toughness of the material, resulting in low yield of parts, insufficient reliability and high cost.
Therefore, traditional commercial alloy powders cannot fully meet the requirements for the manufacture of high-performance components.

Method used

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  • Preparation method for in-situ aluminum-based composite material
  • Preparation method for in-situ aluminum-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Experiments were carried out with high-purity Al, industrial pure Mg, Al-50Cu master alloy, KBF 4 and K 2 TiF 6 In situ self-generated 5wt.%TiB was formulated for the raw material 2 Reinforced Al-2.2Mg-2.2Cu composites. Put high-purity Al into the crucible to melt and heat up to 790°C, and cover it with JZF-03 high-temperature covering agent; put KBF 4 、K 2 TiF 6 Mix evenly according to the mass ratio of 1:2, dry and add to the melt; after the reaction is over, take out the reaction by-products, add Al-50Cu master alloy and industrial pure Mg in turn, and add JZJ type harmless aluminum to the melt The alloy refining agent is subjected to degassing refining, standing at 750°C for 15 minutes, and then gas atomized to make powder. Aerosolization devices such as figure 1 As shown, the process is as follows: the solution temperature is 850°C, He is used for protection and gas atomization, the air pressure is 2.67MPa, and the nozzle diameter is 2.16mm. The morphology ...

Embodiment 2

[0030] Experiments were carried out with high-purity Al, industrial pure Mg, Al-50Cu, Al-12Zr master alloy, KBF 4 and K 2 TiF 6 In situ self-generated 5wt.%TiB was formulated for the raw material 2 Reinforced Al-2.2Mg-2.2Cu-0.1Zr composites. Put high-purity Al into the crucible to melt and heat up to 790°C, and cover it with JZF-03 high-temperature covering agent; put KBF 4 、K 2 TiF 6 After mixing evenly according to the mass ratio of 1:2, dry it and add it to the melt; after the reaction is over, take out the reaction by-products, add Al-50Cu, Al-12Zr master alloy and industrial pure Mg in sequence, and add JZJ to the melt Type harmless aluminum alloy refining agent for degassing and refining, standing at 750°C for 15 minutes, and then gas atomizing to make powder. The gas atomization process is as follows: the solution temperature is 900°C, He is used for protection and gas atomization, the air pressure is 3.10 MPa, and the nozzle diameter is 1.5 mm. The average diame...

Embodiment 3

[0032] Experiments were carried out with high-purity Al, industrial pure Mg, Al-50Cu, Al-12Zr master alloy, KBF 4 and K 2 TiF 6 In situ self-generated 5wt.%TiB was formulated for the raw material 2Reinforced Al-2.2Mg-2.2Cu-0.1Zr composites. Put high-purity Al into the crucible to melt and heat up to 780°C, and cover it with JZF-03 high-temperature covering agent; put KBF 4 、K 2 TiF 6 After mixing evenly according to the mass ratio of 1:2, dry it and add it to the melt; after the reaction is over, take out the reaction by-products, add Al-50Cu, Al-12Zr master alloy and industrial pure Mg in sequence, and add JZJ to the melt Type harmless aluminum alloy refining agent for degassing and refining, standing at 750°C for 20 minutes, and then gas atomizing to make powder. The gas atomization process is as follows: the solution temperature is 920°C, Ar protection is used for gas atomization, the air pressure is 1.10 MPa, and the nozzle diameter is 2.16 mm. The average diameter ...

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Abstract

The invention discloses a preparation method for an in-situ aluminum-based composite material. The preparation method comprises the following steps of: adding a high-temperature covering agent into pure aluminum to smelt, thereby obtaining melt; adding KBF4 and KTiF6 into the melt, and uniformly mixing to react; removing a byproduct, and sequentially adding an aluminum-copper intermediate alloy, an aluminum-zirconium intermediate alloy, an aluminum-scandium intermediate alloy, an aluminum-manganese intermediate alloy, an aluminum-titanium intermediate alloy and pure magnesium, adding a harmless aluminum alloy refining agent, and performing degassing refining and gas-atomizing at a temperature being 700-850 DEG C, thereby obtaining in-situ self-generated TiB2 particle reinforced Al-Cu-Mg composite material powder. The preparation method prepares the aluminum-based composite material which is high in laser absorbing rate and is high in particle spheroidization rate; and moreover, the preparation method is simple in operation, is simple and liable to implement, is low in cost, is high in efficiency and is suitable for large-scale production.

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

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Application Information

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IPC IPC(8): C22C1/10C22C1/03C22C1/06C22C21/16C22C21/06C22C32/00
CPCC22C1/06C22C1/1036C22C21/06C22C21/16C22C32/0073C22C1/1052
Inventor 吴一陈哲廉清张暘王浩伟
Owner SHANGHAI JIAO TONG UNIV
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