Non-crystallization treatment method on alloy surface using power ultrasound

Abstract

The invention relates to a method for amorphous treatment on alloy surface with power ultrasonic wave. The method comprises the following steps: in a liquid medium, local high temperature and high pressure are produced with the cavitating function of the power ultrasonic wave in the liquid medium, to treat the surface of the alloy with a certain amorphous forming capability, so as to form an amorphous layer on the alloy surface; wherein, the liquid medium refers to the liquid which has good liquidity and low volatility, is not easy to be oxidized or catch fire at room temperature; and the amorphous forming capability means the capability of forming full amorphous state when the cooling speed is 10<4>K / s. The method of the invention has quite strong adaptability, can effectively prevent local over-burning and the burning of the alloy elements; the surface has excellently consistent roughness, which can reduce the workload of follow-up treatment; therefore, the method has the advantagesof simple treatment process, convenient operation, etc.

Description

technical field

[0001] The invention relates to the field of alloy surface treatment, in particular to a method for amorphizing the alloy surface by using power ultrasound. Background technique

[0002] Bulk amorphous alloys refer to solid alloys in an amorphous state with macroscopic dimensions on three-dimensional scales. They have high strength, high hardness, and good corrosion resistance. Some bulk amorphous alloys also have excellent magnetic properties. performance. Due to its excellent performance compared with crystalline alloys, its application field has expanded from commercial sports equipment to microelectronic devices, etc. At present, the preparation of bulk amorphous alloys mainly adopts methods such as copper mold casting, spray casting, suction casting, and quartz tube water quenching. Due to the limitation of the amorphous formation ability of amorphous alloys, the size of completely amorphous crystals that can be obtained under certain process condition...

Examples

Embodiment 1

[0024] In the engine oil, the cavitation effect of 1.5KW power ultrasonic in the liquid medium is used to generate local high temperature and high pressure, and the surface of the alloy with certain amorphous forming ability is treated to form an amorphous layer on the surface of the alloy. Mg to be processed 65 Cu 25 Y 10 The alloy has a high amorphous forming ability, and the critical cooling rate is about 10 -2 K / s. The distance between the ultrasonic horn and the surface to be treated is 2mm, the time of ultrasonic action is 70min, the flow rate of engine oil is 200mL / min, Mg 65 Cu 25 Y 10 The average speed of reciprocating motion of the alloy sample is 100mm / s. After treatment, a well-distributed amorphous film layer was obtained on the surface of the alloy. The scanning electron microscope photos of the surface are as follows figure 1 As shown, the X-ray diffraction spectrum is shown as figure 2 .

Embodiment 2

[0026] In deionized water, the cavitation effect of 1.2KW ultrasonic power in deionized water will generate local high temperature and high pressure, which will affect Mg with certain amorphous forming ability. 65 Cu 25 Y 10 alloy surface treatment. Mg to be processed 65 Cu 25 Y 10 The alloy has a high amorphous forming ability, and the critical cooling rate is about 10 -2 K / s. The distance between the ultrasonic horn and the surface to be treated is 1mm, the time of ultrasonic action is 40min, the flow rate of deionized water is 150mL / min, Mg 65 Cu 25 Y 10 The average speed of reciprocating motion of the alloy sample is 100mm / s. After treatment, a well-distributed amorphous film layer was obtained on the surface of the alloy.

Embodiment 3

[0028] In deionized water, using 1.2KW power ultrasonic in deionized water, the rate of ultrasonic cavitation in deionized water will generate local high temperature and high pressure. 74 Al 4 Ga 2 P 12 B 4 Si 4 The surface of the alloy is treated to form an amorphous layer on the surface of the alloy. The alloy to be treated has a high amorphous-forming ability, and the critical cooling rate is about 10 -3 K / s. The distance between the ultrasonic horn and the surface to be treated is 2mm, the time of ultrasonic action is 100min, the flow rate of deionized water is 150mL / min, Mg 65 Cu 25 Y 10 The average speed of reciprocating motion of the alloy sample is 100mm / s. After treatment, a well-distributed amorphous film layer was obtained on the surface of the alloy.

technical field

[0001] The invention relates to the field of alloy surface treatment, in particular to a method for amorphizing the alloy surface by using power ultrasound. Background technique

[0002] Bulk amorphous alloys refer to solid alloys in an amorphous state with macroscopic dimensions on three-dimensional scales. They have high strength, high hardness, and good corrosion resistance. Some bulk amorphous alloys also have excellent magnetic properties. performance. Due to its excellent performance compared with crystalline alloys, its application field has expanded from commercial sports equipment to microelectronic devices, etc. At present, the preparation of bulk amorphous alloys mainly adopts methods such as copper mold casting, spray casting, suction casting, and quartz tube water quenching. Due to the limitation of the amorphous formation ability of amorphous alloys, the size of completely amorphous crystals that can be obtained under certain process condition...

Examples

Embodiment 1

[0024] In the engine oil, the cavitation effect of 1.5KW power ultrasonic in the liquid medium is used to generate local high temperature and high pressure, and the surface of the alloy with certain amorphous forming ability is treated to form an amorphous layer on the surface of the alloy. Mg to be processed 65 Cu 25 Y 10 The alloy has a high amorphous forming ability, and the critical cooling rate is about 10 -2 K / s. The distance between the ultrasonic horn and the surface to be treated is 2mm, the time of ultrasonic action is 70min, the flow rate of engine oil is 200mL / min, Mg 65 Cu 25 Y 10 The average speed of reciprocating motion of the alloy sample is 100mm / s. After treatment, a well-distributed amorphous film layer was obtained on the surface of the alloy. The scanning electron microscope photos of the surface are as follows figure 1 As shown, the X-ray diffraction spectrum is shown as figure 2 .

Embodiment 2

[0026] In deionized water, the cavitation effect of 1.2KW ultrasonic power in deionized water will generate local high temperature and high pressure, which will affect Mg with certain amorphous forming ability. 65 Cu 25 Y 10 alloy surface treatment. Mg to be processed 65 Cu 25 Y 10 The alloy has a high amorphous forming ability, and the critical cooling rate is about 10 -2 K / s. The distance between the ultrasonic horn and the surface to be treated is 1mm, the time of ultrasonic action is 40min, the flow rate of deionized water is 150mL / min, Mg 65 Cu 25 Y 10 The average speed of reciprocating motion of the alloy sample is 100mm / s. After treatment, a well-distributed amorphous film layer was obtained on the surface of the alloy.

Embodiment 3

[0028] In deionized water, using 1.2KW power ultrasonic in deionized water, the rate of ultrasonic cavitation in deionized water will generate local high temperature and high pressure. 74 Al 4 Ga 2 P 12 B 4 Si 4 The surface of the alloy is treated to form an amorphous layer on the surface of the alloy. The alloy to be treated has a high amorphous-forming ability, and the critical cooling rate is about 10 -3 K / s. The distance between the ultrasonic horn and the surface to be treated is 2mm, the time of ultrasonic action is 100min, the flow rate of deionized water is 150mL / min, Mg 65 Cu 25 Y 10 The average speed of reciprocating motion of the alloy sample is 100mm / s. After treatment, a well-distributed amorphous film layer was obtained on the surface of the alloy.

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