Ti-containing high-silicon aluminum alloy capable of achieving aging strengthening and preparation method for deformation material of Ti-containing high-silicon aluminum alloy

A high-silicon aluminum alloy and aging-strengthening technology, which is applied in the field of preparation of Ti-containing age-strengthened high-silicon aluminum alloy and its deformed materials, can solve the problems of poor plastic deformation ability, recrystallized grains of deformed materials, and mixed crystals of aluminum matrix. Achieve the effect of suppressing grain growth, fine and uniform grain size, and simple composition design

Inactive Publication Date: 2016-06-22
NORTHEASTERN UNIV LIAONING
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the poor plastic deformation ability of the existing Mg-containing high-silicon aluminum alloy ingots and the severe recrystallization grain mixing phenomenon of the aluminum matrix of the deformed material, the present invention proposes to add an appropriate amount of Ti element without using modification treatment. Next, a method for preparing aging-strengthable high-silicon aluminum alloy and its deformed material by DC casting

Method used

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  • Ti-containing high-silicon aluminum alloy capable of achieving aging strengthening and preparation method for deformation material of Ti-containing high-silicon aluminum alloy

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Embodiment 1

[0035] Cut a 100mm long ingot from the alloy 1# ingot for implementing the invention, put it into a circulating air furnace at room temperature for double-stage homogenization, heat it up to 300°C for 6 hours, then heat it up to 550°C for 8 hours, and cool it out of the furnace. After double-stage homogenization treatment, the ingot is cut and milled to obtain an ingot with a thickness of about 74mm, which is reheated to 470°C and rolled in 8 passes, and the final thickness of hot rolling is 8mm; in the salt bath furnace In the process, the hot-rolled plate is subjected to a solution treatment at 550°C for 20 minutes, and after water quenching, it is subjected to an artificial aging treatment at 175°C for 10 hours.

Embodiment 2

[0037] Cut a 100mm long ingot from the alloy 1# ingot for implementing the invention, put it into a circulating air furnace at room temperature for double-stage homogenization, heat it up to 250°C for 10h with the furnace, then heat it up to 550°C for 7h, and cool it out of the furnace. After the double-stage homogenization treatment, the ingot is cut and milled to obtain an ingot with a thickness of about 74mm, which is reheated to 485°C and rolled in 6 passes. The final hot rolling thickness is 8mm; in the salt bath furnace In the process, the hot-rolled plate is subjected to solution treatment at 550°C×20min and then artificially aged at 165°C×9h after water quenching.

Embodiment 3

[0039] Cut a 100mm long ingot from the alloy 2# ingot for implementing the invention, put it into a circulating air furnace at room temperature for double-stage homogenization, heat up to 400°C for 4h with the furnace, then heat up to 550°C for 6h, and cool it out of the furnace. After double-stage homogenization treatment, the ingot is cut and milled to obtain an ingot with a thickness of about 73mm, which is reheated to 470°C and rolled in 8 passes, and the final thickness of hot rolling is 9mm; in the salt bath furnace In the process, the hot-rolled plate is subjected to solution treatment at 540°C×30min, and then artificially aged at 180°C×9h after water quenching.

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Abstract

A Ti-containing aging-strengthenable high-silicon aluminum alloy belongs to the technical field of aluminum alloys, and is characterized in that the composition of the alloy is Si 11-13wt%, Mg 0.5-1.0wt%, Ti 0.1-0.8wt%, Fe≤0.5wt% %, the single element content of other alloy elements is ≤0.15wt%, the total content is ≤0.5wt%, and the balance is Al. The steps of the manufacturing method of the aluminum alloy and its deformed material are as follows: ①alloy smelting, ②casting, ③pretreatment, ④homogenization treatment, ⑤thermal deformation, ⑥solid solution water quenching treatment, ⑦aging. The present invention is characterized by low cost of the invented alloy, DC casting and melting casting process without metamorphic treatment, double-stage homogenization combined with deformation heat treatment to improve the thermoforming performance of the invented alloy, simple and convenient production process control of the thermally deformed material, and the invented alloy deformed material not only has relatively high It has high strength and plasticity, and also has excellent wear resistance. It can partially replace the existing 6xxx series aluminum alloys and steels and is widely used in architectural decoration, guide rails, rail transit, containers and other fields.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys and their preparation, and in particular relates to a method for preparing a Ti-containing aging-strengthenable high-silicon aluminum alloy and a deformation material thereof. Background technique [0002] High-silicon aluminum-silicon alloy has high specific strength, high wear resistance and corrosion resistance, low thermal expansion and good dimensional stability unmatched by other aluminum alloys. Its castings have been widely used in tanks, armored vehicles and automobile engine blocks. However, the lamellar eutectic silicon phase in the cast structure of high-silicon aluminum alloy is difficult to refine, resulting in extremely poor plasticity of high-silicon aluminum alloy, so it is rarely used as a deformed material. [0003] Over the years, scholars at home and abroad have devoted themselves to improving the thermoplasticity of high-silicon aluminum alloys. They have successively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22F1/043
CPCC22C21/02C22C1/026C22C1/03C22F1/043
Inventor 田妮王光东贾存发寇丹华宁红赵刚
Owner NORTHEASTERN UNIV LIAONING
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