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A high-performance a356 aluminum alloy refining and strengthening and toughening heat treatment process

A process method and aluminum alloy technology, which are applied in the field of high-performance A356 aluminum alloy refining and toughening heat treatment process, can solve the problems of poor composition uniformity, high hydrogen content, and difficulty in balancing formability and aging strength.

Active Publication Date: 2021-02-12
柳州一阳科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-performance A356 aluminum alloy refining and strengthening and toughening heat treatment process to overcome the high hydrogen content and poor component uniformity of the aluminum alloy melt in the process of smelting A356 aluminum alloy in the existing process and solve the problem that it is difficult to balance the formability and aging strength of A356 aluminum alloy after heat treatment by traditional process

Method used

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  • A high-performance a356 aluminum alloy refining and strengthening and toughening heat treatment process
  • A high-performance a356 aluminum alloy refining and strengthening and toughening heat treatment process
  • A high-performance a356 aluminum alloy refining and strengthening and toughening heat treatment process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A high-performance A356 aluminum alloy refining and strengthening and toughening heat treatment process method, comprising the following steps:

[0054] ⑴ Ingredients

[0055] A356 casting aluminum alloy raw materials, each element is calculated by mass percentage (wt.%), Si: 6.9-7.5%, Mn: ≤0.5%, Mg: 0.3-0.45%, Ti: ≤0.2%, Fe: ≤0.12% , Cu: ≤0.1%, Zn: ≤0.05%, and the balance is Al.

[0056] ⑵, Flux material preparation

[0057] Choose C 2 Cl 6 、K 2 TiF 6 , CaF 2 、Na 2 SiF 6 、Na 3 AlF 6 Aluminum alloy melt composite refining covering slag removal agent configured by components, respectively weighed according to the mass of 0.24wt.%, 0.32wt.%, 0.10wt.%, 0.24wt.%, 0.10wt.% A356 aluminum alloy 2 Cl 6 、K 2 TiF 6 , CaF 2 、Na 2 SiF 6 、Na 3 AlF 6 Components, and mix each component evenly, then wrap it with aluminum foil, heat to 200-260 ℃ and dry it for later use.

[0058] ⑶, master alloy preparation

[0059] The rare earth master alloy Al-10Ce and the alkali...

Embodiment 2

[0078] A high-performance A356 aluminum alloy refining and strengthening and toughening heat treatment process method, comprising the following steps:

[0079] ⑴ Ingredients

[0080] A356 casting aluminum alloy raw materials, each element is calculated by mass percentage (wt.%), Si: 6.9-7.5%, Mn: ≤0.5%, Mg: 0.3-0.45%, Ti: ≤0.2%, Fe: ≤0.12% , Cu: ≤0.1%, Zn: ≤0.05%, and the balance is Al.

[0081] ⑵, Flux material preparation

[0082] Choose C 2 Cl 6 、K 2 TiF 6 , CaF 2 、Na 2 SiF 6 、Na 3 AlF 6 Aluminum alloy melt composite refining covering slag removal agent configured by components, respectively weighed according to the mass of 0.24 wt.%, 0.32wt.%, 0.10 wt.%, 0.24 wt.%, 0.10 wt.% A356 aluminum alloy 2 Cl 6 、K 2 TiF 6 , CaF 2 、Na 2 SiF 6 、Na 3 AlF 6 Components, and mix each component evenly, then wrap it with aluminum foil, heat to 200-260 ℃ and dry it for later use.

[0083] ⑶, master alloy preparation

[0084] Rare earth master alloy Al-10La and alkaline e...

Embodiment 3

[0103] A high-performance A356 aluminum alloy refining and strengthening and toughening heat treatment process method, comprising the following steps:

[0104] ⑴ Ingredients

[0105] A356 casting aluminum alloy raw materials, each element is calculated by mass percentage (wt.%), Si: 6.9-7.5%, Mn: ≤0.5%, Mg: 0.3-0.45%, Ti: ≤0.2%, Fe: ≤0.12% , Cu: ≤0.1%, Zn: ≤0.05%, and the balance is Al.

[0106] ⑵, Flux material preparation

[0107] Choose C 2 Cl 6 、K 2 TiF 6 , CaF 2 、Na 2 SiF 6 、Na 3 AlF 6 Aluminum alloy melt composite refining covering slag removal agent configured by components, respectively weighed according to the mass of 0.24 wt.%, 0.32wt.%, 0.10 wt.%, 0.24 wt.%, 0.10 wt.% A356 aluminum alloy 2 Cl 6 、K 2 TiF 6 , CaF 2 、Na 2 SiF 6 、Na 3 AlF 6 Components, and mix each component evenly, then wrap it with aluminum foil, heat to 200-260°C and dry it for later use;

[0108] ⑶ master alloy preparation

[0109] Rare earth master alloy Al-10Ce, rare earth maste...

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Abstract

The invention relates to a preparation method of high-quality A356 aluminum alloy melting furnace refining structure homogenization and refining and heat treatment strengthening and toughening, mainly to overcome: the traditional A356 aluminum alloy smelting has high hydrogen content, high slag formation and complex composition. In addition, due to the high silicon content of the ingot, the brittleness of the ingot is significant, and it is difficult to balance the formability and aging strength. Therefore, an effective homogeneous dispersion of aluminum alloy melt is proposed, and the purification effect of hydrogen removal and slag removal is enhanced. The high-quality A356 aluminum alloy refining method, and the matching solid solution temperature is selected according to the phase transformation characteristics of the A356 aluminum alloy components. Combined with the secondary aging treatment technology, it also provides a heat treatment that meets the comprehensive mechanical properties of the A356 aluminum alloy. craft.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy smelting and heat treatment, and in particular relates to a high-performance A356 aluminum alloy refining and strengthening and toughening heat treatment process. Background technique [0002] The traditional rotary injection process mainly uses a radial flow graphite rotor to refine and purify the A356 aluminum alloy. During the process of stirring the molten aluminum, the flow field formed by the rotor has zonal circulation, which is prone to local deposition, resulting in the macroscopic distribution of aluminum alloy components. Poor uniformity. Moreover, limited by the traditional rotary injection process, after the addition of the master alloy is melted, the size of the fluid mass formed by dispersion is relatively large, which cannot overcome the sedimentation phenomenon. Uniform nucleation creates sufficient conditions so that the refinement of the master alloy is not fully exploit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C1/03C22C1/06C22F1/043
CPCC22C1/026C22C1/03C22C1/06C22C21/04C22F1/002C22F1/043
Inventor 楼华山王大红李宏军陈文勇楼江燕莫文锋蔡英阙燚彬陈康德李俊鹏高茂涛林泉
Owner 柳州一阳科技股份有限公司