Rare-earth modified high strength aluminum alloy powder special for additive manufacturing

A technology for modification of aluminum alloy powder and rare earth, which is applied in the direction of additive processing, etc., can solve the problems affecting the overall performance of the formed parts, and the performance cannot be guaranteed, so as to improve the physical and chemical properties, refine the alloy grains, expand the The effect of using range

Inactive Publication Date: 2018-04-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different from traditional processing technology, uneven material composition defects will be greatly amplified in the laser additive manufacturing process, which will gr

Method used

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  • Rare-earth modified high strength aluminum alloy powder special for additive manufacturing
  • Rare-earth modified high strength aluminum alloy powder special for additive manufacturing
  • Rare-earth modified high strength aluminum alloy powder special for additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Step (1): Ingredients

[0058] The mass percentages of the internal elements of a special rare earth modified high-strength aluminum alloy powder for additive manufacturing related to the present invention are: Mg: 4.2%, Zn: 0.5%, Ti: 0.35%, Zr: 0.2%, RE: 0.2% and the rest The amount of Al, where RE is a combination of rare earth elements, is Sc (0.15%) and Ce (0.05%). Weigh the pure metal or intermediate alloy powder according to the above ratio, the particle size of the powder should be less than 1mm, and mix it evenly with a ball mill.

[0059] Step (2): Ball milling and mixing of raw materials

[0060] Weigh the pure metal or intermediate alloy powder according to the above ratio, the particle size of the powder should be less than 1mm, and mix it evenly with a ball mill. The ball-to-material ratio is 10:1, the ball milling speed is 200rpm, and the ball milling time is 5h.

[0061] Step (3): Milling

[0062] The powder is made by gas atomization method, in which...

Embodiment 2

[0069] Step (1): Ingredients

[0070] The mass percentages of the internal elements of a special rare earth modified high-strength aluminum alloy powder for additive manufacturing related to the present invention are: Mg: 4.2%, Zn: 0.5%, Ti: 0.35%, Zr: 0.2%, RE: 0.2% and the rest The amount of Al, where RE is a combination of rare earth elements, is Sc (0.14%) and La (0.06%). Weigh the pure metal or intermediate alloy powder according to the above ratio, the particle size of the powder should be less than 1mm, and mix it evenly with a ball mill.

[0071] Step (2): Ball milling and mixing of raw materials

[0072] Weigh the pure metal or intermediate alloy powder according to the above ratio, the particle size of the powder should be less than 1mm, and mix it evenly with a ball mill. The ball-to-material ratio is 10:1, the ball milling speed is 200rpm, and the ball milling time is 5h.

[0073] Step (3): Milling

[0074] The powder is made by gas atomization method, in which...

Embodiment 3

[0081] Step (1): Ingredients

[0082]The mass percentages of the internal elements of a special rare earth modified high-strength aluminum alloy powder for additive manufacturing related to the present invention are: Mg: 4.2%, Zn: 0.5%, Ti: 0.35%, Zr: 0.2%, RE: 0.2% and the rest The amount of Al, where RE is a combination of rare earth elements, is Sc (0.12%), Nd (0.03%) and Yb (0.03%). Weigh the pure metal or intermediate alloy powder according to the above ratio, the particle size of the powder should be less than 1mm, and mix it evenly with a ball mill.

[0083] Step (2): Ball milling and mixing of raw materials

[0084] Weigh the pure metal or intermediate alloy powder according to the above ratio, the particle size of the powder should be less than 1mm, and mix it evenly with a ball mill. The ball-to-material ratio is 10:1, the ball milling speed is 200rpm, and the ball milling time is 5h.

[0085] Step (3): Milling

[0086] The gas atomization method is used to make ...

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Abstract

The invention belongs to the field of aluminum alloy powder material preparation, and relates to rare-earth modified high strength aluminum alloy powder special for additive manufacturing. The rare-earth modified high strength aluminum alloy powder special for additive manufacturing comprises, by mass, 3.8%-5.2% of Mg, 0.2%-0.5% of Zn, 0.2%-0.5% of Ti, 0.04%-0.2% of Zr, 0.06%-0.2 of RE, and the balance Al. RE is a rare earth element combination and comprises Sc and rare earth M, and M is one or more, by any mass ratio, of Ce, La, Nd, and Yb; and the range of the mass ratio of Sc to rare earthM is 6:(4-9). By adding the rare earth elements into an aluminum alloy substrate and the optimum ratio of other elements in aluminum alloy, the combination property of additively-manufactured aluminumalloy workpieces can be enhanced effectively, compared with congeneric aluminum alloy products which are not added with the rare earth elements, the increment of yield strength of the rare-earth modified high strength aluminum alloy additively-manufactured workpieces is up to 80-178 Mpa, and meanwhile a powder bed which is uniformly laid during the manufacturing process is achieved.

Description

technical field [0001] The invention relates to a special rare earth modified high-strength aluminum alloy powder for additive manufacturing, which belongs to the field of aluminum alloy powder material preparation. Background technique [0002] Additive Manufacturing (Additive Manufacturing) technology is an additive manufacturing technology, that is, to build three-dimensional objects by superimposed printing layer by layer, which can realize high-efficiency and high-quality integrated forming of entities with complex geometric shapes, especially suitable for aviation Forming preparation of complex special-shaped components in the aerospace field. Moreover, due to the forming characteristics of local high-speed melting of this technology, it can avoid the disadvantages of the traditional process that it is difficult to achieve uniform distribution of added elements and is easily accompanied by metallurgical defects such as shrinkage and porosity, and improve the overall pe...

Claims

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Application Information

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IPC IPC(8): C22C21/06B33Y70/00B22F9/08
CPCC22C21/06B22F9/082B33Y70/00
Inventor 顾冬冬石齐民
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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