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A method for increasing the density of amorphous alloy

A technology of amorphous alloys and amorphous alloys, applied in metal processing equipment, casting molding equipment, casting mold components, etc., can solve the problems of low density of castings, easy to produce shrinkage cavities, loose center, etc., to improve the overall uniformity Density, the effect of eliminating shrinkage cavity

Active Publication Date: 2019-10-18
CHANGZHOU STREAM LIQUID METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, because the amorphous alloy is prepared by casting process, its center is loose and easy to produce shrinkage cavity, resulting in low density of the obtained casting. The present invention provides a product that eliminates and reduces Casting defects, the method of improving the density of amorphous alloys, can solve the problem of loose centers of amorphous alloy castings and easy shrinkage cavities, resulting in low density of the resulting castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The selected amorphous alloy is zirconium-based amorphous alloy Zr 52.5 Cu 18 Ni 14.5 Ti 5 al 10 . And the zirconium-based amorphous alloy was pressure-cast into a rod with a diameter of 3mm and a length of 20mm. The density of the casting was 98.5% after testing.

[0023] The following methods are used to improve the density of amorphous alloys:

[0024] A method for improving the density of an amorphous alloy, comprising the steps of:

[0025] (1) When the vacuum degree is less than 10 -3 Under the vacuum condition of 1 atmospheric pressure, put the cast amorphous alloy rod casting into the casting mold, and use high-frequency induction heating to raise the temperature T of the amorphous alloy casting to: Tg<T<Tx, where Tg is Amorphous transition temperature, Tx is crystallization temperature;

[0026] (2) Stop heating, and use the casting mold to cold press, so that the temperature of the amorphous alloy casting is cooled to below the amorphous transition tem...

Embodiment 2

[0028] The selected amorphous alloy is zirconium-based amorphous alloy Zr 52.5 Cu 18 Ni 14.5 Ti 5 al 10 . And the zirconium-based amorphous alloy is pressure-cast into a rod with a diameter of 3 mm and a length of 20 mm. The density of the casting is 98.4% after testing.

[0029] The following methods are used to improve the density of amorphous alloys:

[0030] A method for improving the density of an amorphous alloy, comprising the steps of:

[0031] (1) Under the condition of argon protection, put the cast amorphous alloy rod casting into the casting mold, use it as hydraulic oil to heat, and raise the temperature T of the amorphous alloy casting to: Tg<T<Tx, Where Tg is the amorphous transition temperature, and Tx is the crystallization temperature;

[0032] (2) Stop heating, and use the casting mold to cold press, so that the temperature of the amorphous alloy casting is cooled to below the amorphous transition temperature of the amorphous alloy within 1S, and a hi...

Embodiment 3

[0034] The selected amorphous alloy is zirconium-based amorphous alloy Zr 52.5 Cu 18 Ni 14.5 Ti 5 al 10 . And the zirconium-based amorphous alloy was pressure-cast into a rod with a diameter of 3mm and a length of 20mm. The density of the casting was 98.5% after testing.

[0035] The following methods are used to improve the density of amorphous alloys:

[0036] A method for improving the density of an amorphous alloy, comprising the steps of:

[0037] (1) When the vacuum degree is less than 10 -3 Under the vacuum condition of 1 atmospheric pressure, put the cast amorphous alloy rod casting into the casting mold, and use high-frequency induction heating to raise the temperature T of the amorphous alloy casting to: Tg<T<Tx, where Tg is Amorphous transition temperature, Tx is crystallization temperature;

[0038] (2) Stop heating, and use the casting mold to cold press, so that the temperature of the amorphous alloy casting is cooled to below the amorphous transition tem...

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Abstract

The invention relates to a method for improving the amorphous alloy density. The method comprises the following steps that (1), under a condition of inert-gas protection or vacuum, a casted amorphous alloy casting finished product is placed into a casting mold, and through an overall heating and instant temperature-rising method, the temperature T of an amorphous alloy casting is raised to be T, wherein T is larger than Tg and smaller than Tx, Tg is an amorphous transformation temperature, and Tx is a crystallization temperature; and (2), heating is stopped, the casting mold is used for cold pressing, thus the temperature of the amorphous alloy casting is instantly cooled to be below the amorphous transformation temperature of an amorphous alloy, and the amorphous alloy casting with the high density is obtained. According to the method for reducing and eliminating product casting defects and improving the amorphous alloy density, the problem that the obtained casting density is low due to the fact that the center of the amorphous alloy casting is loose and prone to generating a contraction cavity can be solved.

Description

technical field [0001] The invention relates to a method for increasing the density of an amorphous alloy, in particular to a method for eliminating and reducing product casting defects and increasing the density of an amorphous alloy. Background technique [0002] Amorphous alloys have many excellent mechanical properties, such as high strength and hardness, due to their unique structure of long-range disorder and short-range disorder, and are widely used in mechanical parts. In recent years, people have obtained bulk amorphous alloys in more than ten systems such as Zr-based, La-based, Mg-based, Fe-based, Cu-based, Ni-based, and rare earth-based, among which Zr-based amorphous alloys have strong It has attracted much attention due to its excellent amorphous forming ability and excellent mechanical properties, and has been widely used. [0003] In the prior art, the forming technology of amorphous alloy mostly adopts the pressure casting forming process for near-net formin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/12B22D27/04B22D27/15
Inventor 申曦朱勤旺侯玉婷朱秀娟
Owner CHANGZHOU STREAM LIQUID METAL CO LTD
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