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Metal glass melt cast moulding method and its device

A metal glass, casting and forming technology, applied in the field of metallurgy and metal material processing, can solve the problems of high equipment requirements, easy generation of pores in the sample, large equipment investment, etc. Effect

Inactive Publication Date: 2006-07-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the requirements for equipment are high, and the investment in equipment is large.
[0015] To sum up, at present, most of the forming methods of bulk metallic glasses in the world adopt traditional forming methods for the preparation of samples. Since most of them require fast forming speed, the samples prepared by blow casting or high-speed die casting are easy. Defects such as pores

Method used

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  • Metal glass melt cast moulding method and its device
  • Metal glass melt cast moulding method and its device
  • Metal glass melt cast moulding method and its device

Examples

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Effect test

example 1

[0039] Melting magnesium-based metallic glass material in a resistance furnace, the composition is Mg 65 Cu 25 Y 10 . It is melted under the protection of Ar gas, and the pouring temperature of the metallic glass melt is controlled between 580 and 700°C through PID adjustment. The sample diameter of the copper mold is 3mm. Utilize the negative pressure suction casting forming method to form, first pass through the control valve 6, the pressure measuring device 7 and the negative pressure stabilizing device 8, the negative pressure degree (vacuum degree) of the negative pressure generator 5 control device is 8kPa. Connect the mold with the suction pipe at the lower end and the pipeline connection device at the upper end. When pouring, insert the suction tube into the metal melt, open the control valve, and the metal glass melt in the crucible will rise into the cavity of the copper mold through the suction tube under the action of negative pressure. When the mold is full, ...

example 2

[0041] Melting aluminum-based metallic glass material with composition Al in a resistance furnace 85 Ni 5 Y 8 co 2 . It is melted under the protection of Ar gas, and the pouring temperature of the metallic glass melt is controlled between 700 and 750°C through PID adjustment. The parts of the copper mold are plate-shaped parts with an average thickness of 2mm. Utilize the negative pressure suction pouring forming method to form, first pass through the control valve 6, the pressure measuring device 7 and the negative pressure stabilizing device 8, the negative pressure degree (vacuum degree) of the negative pressure generator 5 control device is 10kPa. When pouring, insert the suction tube into the metal melt, open the control valve, and the metal glass melt in the crucible will rise into the cavity of the copper mold through the suction tube under the action of negative pressure. When the mold is full, close the control valve, lift the copper mold and the suction tube out...

example 3

[0043] Melting magnesium-based metallic glass material in a resistance furnace, the composition is Mg 75 Ni 15 Nd 10 . It is melted under the protection of Ar gas, and the pouring temperature of the metallic glass melt is controlled between 650 and 750°C through PID adjustment. The part cavity of the copper mold is a thin plate with an average wall thickness of 2mm. Utilize negative pressure-differential pressure forming method to form, first pass through control valve 6, pressure measuring device 7 and negative pressure stabilizing device 8, the negative pressure degree (vacuum degree) of negative pressure generator 5 control device is 5kPa. Connect the mold with the suction pipe at the lower end and the connection pipe at the upper end. When pouring, insert the suction pipe into the metal melt, and use the protective gas device and the flow pressure controller to control the gas pressure of the liquid surface of the metal glass melt in the crucible to 10kPa. Open the co...

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Abstract

The invention discloses a forging moulding method and device of metal glass flux, which comprises the following steps: adding the alloy in the melting furnace; adjusting the temperature; extracting the gas in the mould when reaching the casting temperature; generating 5-15 KPa negative pressure; attracting the metal glass flux in the mould cavity to mould element. The device is characterized by the following: connecting the crucible in the melting furnace with the mould through attraction pipe; connecting the negative pressure generator with the top of mould through connection pipe; setting control valve, pressure measuring device and negative pressure stable device on the connection pipe sequently. The method can force gas pressure on the flux surface, which promotes the moulding course of metal glass flux.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and metal material processing, and in particular relates to a method and device for casting a metal glass (amorphous state) melt. technical background [0002] Metallic glass (bulk amorphous alloy) has ultra-high strength, hardness, and superior corrosion resistance. It has potential wide applications in the fields of military, aerospace, and electronics. One of the hot spots of contention. [0003] The amorphous state is simply a state in which atoms are arranged in a long-range disorder and a short-range order. The main feature of amorphous alloys is that the three-dimensional space of atoms is arranged in a topologically disordered state; structurally, there are no defects such as grain boundaries and stacking faults, but the arrangement of atoms is not completely disordered like ideal gases. Amorphous alloys are characterized by metallic bonds. Although there is no long-range order, they ...

Claims

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Application Information

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IPC IPC(8): B22D18/06
Inventor 吴树森毛有武万里罗吉荣刘伟
Owner HUAZHONG UNIV OF SCI & TECH
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