Method for improving forming ability and strength of amorphous alloy by controlling solidifying condition

A technology for controlling solidification and amorphous alloys, applied in the field of bulk amorphous alloy preparation, can solve problems such as huge experimental consumption, and achieve the effects of high strength, improved surface free energy, rapid filling and compaction

Active Publication Date: 2011-04-20
辽宁金研液态金属科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In recent years, people have made many achievements in the preparation of larger-sized bulk amorphous alloys, but many of them are based on the optimization of alloy composition, which is summarized through a large number of experiments with different composition points, and the experiment consumption is huge; and through The improvement of the traditional preparation method to improve the amorphous formation ability is not only simple and easy to implement, but also can be used for reference in the future industrial production of amorphous alloys

Method used

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  • Method for improving forming ability and strength of amorphous alloy by controlling solidifying condition
  • Method for improving forming ability and strength of amorphous alloy by controlling solidifying condition
  • Method for improving forming ability and strength of amorphous alloy by controlling solidifying condition

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Embodiment 1

[0023] The selected alloy is Zr-Al-Ni-Cu, and the specific composition is: 64.9% Zr, 7.9% Al, 10.7% Ni, 16.5% Cu (atomic percentage).

[0024] The smelting method of Zr-Al-Ni-Cu master alloy is a conventional technology among the present invention, and the specific process parameters and process of master alloy smelting in this embodiment are as follows: the raw materials used are respectively Zr, Al, Ni, Cu high-purity metal (purity is not high) less than 99.9wt.%); master alloy ingots are melted by electric arc, the working chamber is first evacuated to 10-2 ~ 10-4Pa, and then high-purity argon gas (purity 99.99wt.%) is introduced for melting; melting Before alloying, the Ti metal ingot is first melted, and titanium oxide is formed through oxidation reaction to further reduce the partial pressure of oxygen in the working chamber. In order to ensure that the composition of the alloy ingot is as uniform as possible, each alloy ingot needs to be turned and smelted 3 to 5 times; ...

Embodiment 2

[0029] The difference from Example 1 is:

[0030] The alloy composition is 47% Zr, 37.5% Cu, 7.5% Ag, 8% Al (atomic percentage). The specific process parameters of copper mold casting are as follows: vacuum degree 10-2~10-4Pa, cooling speed 1~10 2K / s, the mold temperature is preheated to 353K. From Figure 4 It can be seen that the X-ray crystalline peak of the sample prepared at a mold temperature of 353K is significantly weakened, and it is basically completely amorphous, indicating that the ability to form amorphous is enhanced. Simultaneously, the compressive breaking strength at room temperature is 2159-2228MPa, which is 4%-8% higher than that of the sample (2073MPa) prepared by mold at room temperature.

Embodiment 3

[0032] The difference from Example 1 is:

[0033] The alloy composition is 62% Zr, 15.4% Cu, 12.6% Ni, 10% Al (atomic percentage). The specific process parameters of copper mold casting are as follows: vacuum degree 10 -2 ~10 -4 Pa, cooling rate 1~10 2 K / s, the mold temperature is preheated to 353K. The amorphous formation ability of the sample prepared at the mold temperature of 353K is enhanced. At the same time, the compressive fracture strength is increased by 7.4% on average compared with the sample prepared by room temperature mold.

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Abstract

The invention relates to a preparation technology of block amorphous alloy, in particular to a method for improving the forming ability and strength of amorphous alloy by controlling solidifying condition. The method has low process cost, is simple and easy, can obviously strengthen the forming ability of block amorphous alloy and improve the material strength and is suitable for a majority of amorphous systems. The casting is carried out when the preheating temperature of a die reaches 353-393K by adjusting the preheating temperature of the die through adopting a copper die casting method and the amorphous forming ability can be improved so that the amorphous alloy in a larger size can be obtained; meanwhile, the strength of an amorphous alloy material is improved by 4-18 percent. The invention develops a novel method for improving the forming ability of the block amorphous alloy, confirms a novel process parameter for producing the block amorphous alloy in larger size and improving the strength and broadens the application field of the block amorphous alloy.

Description

technical field [0001] The invention relates to the preparation technology of a bulk amorphous alloy, in particular to a method for improving the forming ability and strength of the amorphous alloy by controlling solidification conditions. Background technique [0002] In 1960, Professor Duwez and others in the United States first prepared Au-Si amorphous alloys by the melt quenching method, but the preparation of traditional amorphous alloys required more than 10 6 The extremely high cooling rate of K / s, and the thickness or diameter generally does not exceed 50 μm, which greatly limits the application in practical engineering. Since 1988, the research group represented by Professor Inoue of Japan and Professor Johnson of the United States has taken the lead in developing bulk amorphous alloys with three-dimensional dimensions of more than 1mm, including La-based, Mg-based, Zr-based, Pd-based, Ti-based, Fe Many systems such as base and Cu base. This kind of multi-componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00B22D27/04
Inventor 张海峰毛杰付华萌王爱民李宏胡壮麒
Owner 辽宁金研液态金属科技有限公司
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