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A kind of mn-containing aging-strengthened high-silicon aluminum alloy and its deformation material preparation method

A high-silicon aluminum alloy and age-strengthening technology, which is applied in the field of preparation of Mn-containing age-strengthened high-silicon aluminum alloy and its deformed material, can solve the problems of poor plastic deformation ability, recrystallized grains and mixed crystals of the aluminum matrix of the deformed material, etc. Achieve the effect of inhibiting grain growth, fine and uniform grain, and low cost

Active Publication Date: 2017-12-05
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As mentioned above, the present invention aims at the two major problems of poor plastic deformation ability of existing Mg-containing high-silicon aluminum alloy ingots and serious recrystallized grain mixing of the aluminum matrix of the deformed material, and proposes to add an appropriate amount of Mn element. Under the condition of metamorphic treatment, the method for preparing age-strengthenable high-silicon aluminum alloy and its deformed material by DC casting

Method used

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  • A kind of mn-containing aging-strengthened high-silicon aluminum alloy and its deformation material preparation method
  • A kind of mn-containing aging-strengthened high-silicon aluminum alloy and its deformation material preparation method

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Embodiment 1

[0045] 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 200°C for 8 hours with the furnace, then heat it up to 550°C for 8 hours, 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 480°C for rolling, and the rolling is divided into 8 passes, and the final thickness of hot rolling is 8mm; In the process, the hot-rolled plate is subjected to a solution treatment at 540°C×20min, and after water quenching, it is subjected to an artificial aging treatment at 165°C×12h.

Embodiment 2

[0047] 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 double-stage homogenization treatment, the ingot is cut and face-milled to obtain an ingot with a thickness of about 72mm, which is reheated to 475°C for rolling, and rolled in 6 passes, and the final thickness of hot rolling is 8mm; In the process, the hot-rolled plate is subjected to a solution treatment at 550°C for 30 minutes, and after water quenching, it is subjected to an artificial aging treatment at 185°C for 8 hours.

Embodiment 3

[0049] Cut a 100mm long ingot from the alloy 3# ingot for implementing the invention, put it into a circulating air furnace at room temperature for double-stage homogenization, heat up to 450°C for 4h with the furnace, then raise the temperature 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 74mm, which is reheated to 490°C and rolled in 6 passes. The final hot rolling thickness is 8mm; In the process, the hot-rolled plate is subjected to solution treatment at 548°C×30min, and then artificially aged at 180°C×9h after water quenching.

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Abstract

The invention discloses an Mn containing high-silicon aluminum alloy capable of achieving ageing strengthening, and belongs to the technical field of aluminum alloy. The Mn containing high-silicon aluminum alloy is characterized in that the alloy is prepared from, by weight, 11% to 13% of Si, 0.5% to 1.0% of Mg, 0.1% to 3.0% of Mn, not larger than 0.5% of Fe, not larger than 0.2% of a single element in other alloy elements and the balance Al, wherein the total weight content of the other alloy elements is not larger than 0.5%. The preparation method of the aluminum alloy comprises the following steps of 1 alloy smelting, 2 casting forming, 3 pretreatment, 4 homogenization treatment, 5 thermal deformation, 6 solid solution water quenching treatment and 7 ageing. The Mn containing high-silicon aluminum alloy has the beneficial effects that the alloy is low in cost, a DC casting melt casting process is adopted, and modification is not needed; and double-stage homogenization is combined with deformation thermal treatment, the thermal forming performance of the alloy is improved, and a thermal deformation material production process is easy and convenient to control. The deformation material of the alloy has high strength and plasticity, meanwhile has excellent abrasion resisting performance, and can partially replace an existing 6xxx series aluminum alloy and steel to be widely applied to the fields of building decoration, guide rails, track traffic, containers and the like.

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 Mn-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, and have successively ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/02C22F1/043
Inventor 田妮贾存发王光东宁红寇丹华吴青霖赵刚
Owner NORTHEASTERN UNIV LIAONING
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