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Amorphous alloy inoculation method for treating cast aluminum alloy

A technology for casting aluminum alloys and amorphous alloys, which is applied in the field of amorphous alloy inoculation treatment of cast aluminum alloys, to achieve the effects of easy dispersion and uniformity, small burning loss, and shortened solidification time

Active Publication Date: 2013-05-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are currently no reports in the literature on modification (including inoculation) with amorphous alloys

Method used

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  • Amorphous alloy inoculation method for treating cast aluminum alloy
  • Amorphous alloy inoculation method for treating cast aluminum alloy
  • Amorphous alloy inoculation method for treating cast aluminum alloy

Examples

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preparation example Construction

[0060] 2, the preparation of amorphous alloy inoculant in the above-mentioned embodiment:

[0061] Firstly, the ingredients are prepared according to the composition of the inoculant, and the prepared alloy is put into the water-cooled copper crucible in the melting chamber of the electric arc furnace. Before smelting, the vacuum degree of the electric arc furnace smelting chamber is pumped to a vacuum state of 0.006-0.008Pa, and then 0.05-0.06MPa high-purity argon gas is introduced into the smelting vacuum chamber, under the protection of high-purity argon gas absorbing oxygen from Ti, Use electric arc to smelt the inoculant of the present invention in a water-cooled copper crucible, the smelting current is 250-350A, smelt for 3-4 minutes, turn over, add electromagnetic stirring during the smelting process, turn over and smelt repeatedly 4-5 times, so that the composition of the alloy is uniform . Finally, start the vacuum pump to suck the alloy liquid in the crucible into t...

Embodiment 2-12

[0065] figure 1 (a) is an aluminum alloy without amorphous inoculation treatment (Example 1) and (b-m) an aluminum alloy treated with Zr series, Ni series, Cu series, Ti series and Al series amorphous alloy inoculants (Example 2 -12) as-cast microstructure (optical microscope photo). Figure 1 shows that the as-cast microstructure grain size of the aluminum alloy without inoculation treatment is relatively thick, and the grain size is mostly at 150-250 microns, while the aluminum alloys treated with different alloy system amorphous alloy inoculants (Example 2-12) The as-cast microstructure has been unexpectedly refined, and the grain size is mostly between 35-150 microns. Compared with the as-cast structure of the aluminum alloy without amorphous inoculation treatment, the grains are refined to its 3 / 5 or even 1 / 4 of that. And most of them are approximately equiaxed crystals with uniform structure. figure 2 Curves 1-12 are tensile engineering stress-strain curves of non-ino...

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Abstract

The invention relates to an amorphous alloy inoculation method for treating cast aluminum alloy. The amorphous alloy inoculation method for treating the cast aluminum alloy comprises preparation of inoculant and amorphous inoculation treatment. The technological parameter of the inoculation treatment is as follows: adding a prepared amorphous thin strip into aluminum melt before the aluminum is cast, the temperature of the aluminum melt is from 750 DEG C to 770 DEG C; the added amount of the amorphous inoculant is 0.05-1.0 wt.% of the weight of the aluminum; the treating time of inoculation is 15-600 seconds; an auxiliary machinery stirs for 0-300 seconds; and auxiliary ultrasound shocks for 0-180 seconds. The inoculant utilized by the amorphous alloy inoculation method is multivariate amorphous alloy including Zr series, Ni series, Cu series, Al series, Ti series and the like, precious metal is not contained, and cost is lower. The inoculant is in a thin-strip shape, can be dispersed in the melt uniformly and conveniently, the actual receiving ratio of modificator is high, tissue after refining is uniform, the time of modification treatment and alloy solidification are greatly shortened, and production efficiency is high. Moreover, the amorphous alloy inoculation method for treating cast aluminum alloy is applicable to large-batch continuous production of the amorphous alloy for a long time.

Description

technical field [0001] The invention relates to the field of alloy solidification, in particular to a new method for inoculating cast aluminum alloys with amorphous alloys. Background technique [0002] In the field of solidification of metal materials, modifiers and inoculants are generally added to metal melts in the form of crystals (elementary substances, compounds, alloys, etc.) to modify (including inoculation), refine the crystal phase or change the growth mode of the crystal phase . The metamorphic mechanism is generally the core (non-spontaneous core) or "poison" theory. There are currently no reports in the literature on modification (including inoculation) using amorphous alloys. The invention relates to a brand-new method for treating cast aluminum alloy with an amorphous alloy inoculant. The metastable structure of the amorphous alloy and the physical characteristics of amorphous crystallization are used to inoculate the aluminum alloy, and an unexpected effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/20C22C1/03C22C21/12
Inventor 姜启川百志好邱丰
Owner JILIN UNIV
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