A kind of copper mold for preparing bulk amorphous alloy and the preparation method of copper mold
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An amorphous alloy and copper mold technology is applied in the field of copper molds for preventing the hollowing of bulk amorphous alloys prepared by vacuum suction casting method and the field of preparation thereof, which can solve problems such as poor uniformity and compactness, and achieve excellent performance and uniform tension. , cleverly designed effects
Active Publication Date: 2015-11-18
FOSHAN MINGFUXING METAL MATERIALS CO LTD
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[0004] However, when the traditional copper mold vacuum suction casting method is used to prepare bulk amorphous alloys, the molten alloy rolls and rolls in the melting cavity at the upper end of the water-cooled copper mold. During suction casting, the top of the suction casting port is connected to the bottom of the melting cavity, which may easily cause damage to the furnace body. The protective gas is quickly squeezed into the copper mold cavity along with the suction casting process along the top of the alloy under negative pressure, which often makes the suction casting amorphous alloy sample hollow, and the uniformity and compactness are poor.
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[0020] The structure diagram of the present invention is as figure 1 As shown, the copper mold for preparing bulk amorphous alloys of the present invention includes a melting cavity 1, a suction casting port 2, a copper mold 3, and a cavity 5, wherein one end of the copper mold 3 is provided with a melting cavity 1 , The smelting cavity 1 is provided with a suction casting port 2, and the geometric center of the copper mold 3 is provided with a cavity 5.
[0021] The above-mentioned suction casting port 2 is arranged at the end of the smelting cavity 1 . In this embodiment, the suction casting port 2 is arranged at the lowest position at the end of the melting cavity 1 .
[0022] The above-mentioned suction casting port 2 is a crater-shaped suction casting port. The water-cooled copper mold of the present invention is based on the traditional water-cooled copper mold, at the bottom of the concave ball crucible-shaped smelting concave cavity 1 for smelting alloys, the copper ...
specific Embodiment
[0034] Implementation example 1:
[0035] 1. Put Zr with a purity of 99.8%, Cu with a purity of 99.5%, Ni with a purity of 99.98% and Al with a purity of 99.5% as Zr 55 Cu 30 Ni 5 Al 10 The nominal ingredients are batched and placed in the electric arc furnace;
[0036] 2. Vacuum the electric arc furnace, when it reaches 3×10 -3 After the vacuum degree of Pa is filled with argon to an atmospheric pressure, under the protection of argon, the titanium is first melted to absorb residual oxygen, and then the alloy is smelted for 3~5 times to form a master alloy;
[0037] 3. According to the shape and size of the prepared sample, calculate the theoretical mass of the required master alloy, then break the master alloy, weigh the master alloy fragments of the corresponding quality, and move it to the concave spherical crucible-shaped smelting concave at the upper end of the water-cooled copper mold of the present invention. Cavity;
[0038] 4. Start the arc to melt the master...
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Abstract
The invention relates to a copper mould for preparing bulk amorphous alloy and a manufacture method of the copper mould. The copper mould for preparing the bulk amorphous alloy comprises a smelting cavity, a suction casting nozzle, a copper mould and a mold cavity, wherein one end of the copper mould is provided with the smelting cavity which is provided with the suction casting nozzle, and the mold cavity is formed in the geometric center of the copper mould; and the suction casting nozzle is formed in the end part of the smelting cavity. When the bulk amorphous alloy is prepared by using the traditional copper mould vacuum suction casting method, molten alloy turns and rolls in the smelting cavity in the upper end pat of the water-cooled copper mould, and during suction casting, protective gas in a furnace body is easily extruded into the mold cavity of the copper mould along the top of the alloy in the suction casting process under negative pressure because the top of the suction casting nozzle is connected with the bottom of the smelting cavity, so that the alloy subjected to suction casting is hollow always and is poor in uniformity and compactness. According to the invention, the crater-shaped suction casting nozzle is formed in the bottom of the smelting cavity to create a condition as if a draw is inserted into the molten alloy, so that the tension around the alloy is uniform during suction casting, the alloy, prior to the protective gas, fills the mold cavity of the copper mould, and the amorphous alloy obtained after suction casting is uniform and compact without a hollow phenomenon.
Description
technical field [0001] The invention relates to a copper mold for preparing large amorphous alloys and a method for preparing the copper mold, in particular to a copper mold for preventing hollowing of large amorphous alloys prepared by a vacuum suction casting method and a preparation method thereof. The invention belongs to the modification technology of a copper mold for preparing bulk amorphous alloy and a preparation method of the copper mold. Background technique [0002] Bulk amorphous alloys have excellent comprehensive properties due to their unique structure, and are currently a research hotspot in the fields of materials science, condensed matter physics and mechanics, and have broad application prospects. At present, with the continuous improvement of the formation theory and the great progress made in the composition design, most of the bulk amorphous alloy systems can be prepared by using the copper mold vacuum suction casting method. [0003] Vacuum suction c...
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