Foamed aluminium or foamed aluminium alloy continuous casting system and continuous casting process

A foamed aluminum alloy and casting process technology, applied in the field of metal product manufacturing, can solve the problems of restricting the large-scale commercial application of foamed aluminum, uneven distribution of foam body, high raw material cost, etc. The effect of good distribution uniformity and high degree of automation

Inactive Publication Date: 2007-07-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The infiltration casting method is generally used to manufacture through-hole foamed aluminum; the powder metallurgy method is not suitable for the production of foamed aluminum used in general industrial fields due to high production costs
The melt foaming process is simple, but the existing melt direct foaming method has the following deficiencies: (1) the operation is difficult, as described in US.pat.3743353, use TiH 2 When preparing foamed aluminum as a foaming agent, the stirring and foaming time is required to be controlled at 1 to 2 minutes; (2) it can only be operated intermittently, as the method described in CN1320710A has improved foreign patents, so that the difficulty of foamed aluminum operation is greatly reduced, but this The method belongs to the gap operation; (3) when the control is improper, there is a solid body with a certain thickness at the bottom of the foam, and the distribution of the foam in the foam is uneven; (4) the cost of raw materials is high, and the foaming agent usually used is TiH 2 (5) It is only suitable for the preparation of some low-melting aluminum alloy foams; it is because of these deficiencies that the production cost of foamed aluminum remains high and limits the large-scale commercial application of foamed aluminum
In order to solve the defect of high production cost of gap-type aluminum foam, U.S. Patent US.pat6984356B2 describes a continuous preparation method of foam aluminum, but this patent cannot increase the viscosity of the melt online according to the required amount, and does not point out how to adjust the viscosity-increased melt. The amount of air bubbles in the body, and there is no clear equipment and operation process for the continuous casting of foamed aluminum

Method used

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  • Foamed aluminium or foamed aluminium alloy continuous casting system and continuous casting process
  • Foamed aluminium or foamed aluminium alloy continuous casting system and continuous casting process
  • Foamed aluminium or foamed aluminium alloy continuous casting system and continuous casting process

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Embodiment 1

[0037] a. The system of the present invention consists of more than one melting furnace (1), foaming furnace (2) and one or more sets of casting devices (3). The smelting furnace (1) can be an induction furnace or a reverberatory furnace, and its function is to continuously supply qualified aluminum or aluminum alloy melt to the foaming furnace; the foaming furnace (2) is separated by a refractory partition (200). Into a viscosifying chamber (21) and a foaming chamber (22), the bottom of the dividing plate leaves a diversion hole (201) where the melt in the viscosifying chamber can flow to the foaming chamber; Discharging hole (220), so that when unexpected situation occurs, the material in the foaming furnace can be discharged in time.

[0038] b. The viscosity-increasing chamber (21) is equipped with a viscosity sensor (210) and a mixing agitator (211) capable of inhaling the viscosity-increasing agent under negative pressure. The viscosity of the melt in the tackifying cha...

Embodiment 2

[0046] Pull-up continuous casting of 6063 foamed aluminum alloy rod

[0047] In this embodiment, four foamed aluminum rods with a diameter of 50mm are simultaneously produced, and the material and composition are the same as those of 6063 aluminum alloy. Nitrogen is used for foaming. The continuous casting process is shown in FIG. 5 . The casting process is described step by step below.

[0048] The first step: the installation of the crystallizer and the melting of the aluminum alloy melt.

[0049] (1) The installation of the crystallizer. a, the crystallizer is installed on the foaming furnace cover (223) shown in Fig. 1 . Present embodiment is that four groups of casting devices are installed on the furnace cover at the same time, and four circular crystallizers of these four groups of casting devices are respectively installed in casting ports (2231), (2232), (2233) and (2234), (2100), (2110) and (2210) shown in Fig. 3 are respectively installed viscosity sensor (210) a...

Embodiment 3

[0056] Horizontal continuous casting of pure aluminum foam board

[0057] In this embodiment, an aluminum foam plate with a cross-section width and thickness of 300×100 mm is simultaneously horizontally and continuously cast, and the material composition is pure aluminum, which is foamed with nitrogen. The continuous casting process is shown in FIG. 5 . The casting process is described step by step below.

[0058] (1) The installation of the crystallizer. a, install two square crystallizers in the horizontal continuous casting system shown in Figure 2, the specific installation position is shown in Figure 4, that is, the casting port (2241) and (2242) of the side view of the foaming furnace B, two The center distance of the casting mouth is D is 600mm, and the height H between the center line of the casting mouth and the center position of the foaming furnace is 300mm. The shape of each part in the crystallizer is shown in Figure 7. In this embodiment, the water-cooling jac...

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Abstract

The invention relates to a system used to continuously cast foam aluminum or foam aluminum alloy, and relative technique, wherein said system is formed by smelter, foaming furnace with viscosifier room and foaming room, the casting device with drawer and crystallizer. And the continuous casting process comprises that: smelting, viscosifying, foaming, and continuously casting. The viscosifying process is that mixer with vacuum adsorption function adsorbs viscosifier; the foaming process is that the mixer adsorbs foaming agent or foaming gas. The invention can product the foam aluminum with different sections, densities and kinds, with low cost.

Description

technical field [0001] The invention belongs to the field of metal product manufacturing, in particular to a continuous casting system of foamed aluminum or foamed aluminum alloy and a continuous casting process thereof. Background technique [0002] Aluminum foam is a new type of porous metal material. Its light weight and high specific strength make it a potential structural material; its sound absorption, sound insulation, heat insulation, flame retardancy, shock absorption, impact energy absorption and electromagnetic shielding make it a Can be used as functional material. Therefore, in aviation, aerospace, transportation, electronics, military industry, chemical industry, environmental protection, energy, machinery, biology and other high-tech fields and general industrial fields, the application of foamed aluminum has received more and more attention. At present, the preparation methods of aluminum foam mainly include infiltration casting, powder metallurgy and melt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D1/00B22D11/14C22C1/08
Inventor 周向阳李劼刘宏专丁凤其刘希泉张华尚保卫伍上元
Owner CENT SOUTH UNIV
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