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Preparation method of alloy semisolid slurry

A semi-solid slurry and alloy technology, applied in the field of alloy semi-solid slurry preparation, can solve problems such as poor slurry uniformity, and achieve the effect of promoting equiaxed growth and uniform structure

Active Publication Date: 2015-06-24
冯睿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the direct action of the air flow, most of the melt near the graphite rod is concentrated, and the uniformity of the prepared slurry is not good.

Method used

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  • Preparation method of alloy semisolid slurry
  • Preparation method of alloy semisolid slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: The ZL101 aluminum alloy is used for smelting to prepare a semi-solid molded part. The liquidus temperature of ZL101 aluminum alloy is 615°C, and the solidus temperature is 567°C. The alloy is heated to 700°C in the heating furnace, and the slurry container is taken out of the molten aluminum alloy from the heating furnace.

[0036]The elongated probe 6 is inserted 20mm below the aluminum alloy liquid surface through the lifting device, and dry nitrogen at a temperature of 15°C is introduced from the elongated probe 6 under the aluminum alloy liquid surface, and the treatment time for both is 2Min. The ultrasonic vibration frequency is 28KHz, the vibration amplitude is 0.5mm, and the nitrogen gas feeding rate is 15L / Min. After the processing time is in place, lift the slender probe 6 to 100mm above the liquid level with the lifting device, and the slurry container sends the aluminum alloy semi-solid slurry into the material chamber of the die-casting mach...

Embodiment 2

[0037] Example 2: The ZL109 aluminum alloy was smelted to prepare a semi-solid molded part. The liquidus temperature of ZL109 aluminum alloy is 566°C, and the solidus temperature is 538°C. The alloy is heated to 700°C in the heating furnace, and the slurry container is taken out of the molten aluminum alloy from the heating furnace.

[0038] like Figure 5 As shown, the slender probe 6 is inserted 20mm below the aluminum alloy liquid surface through the lifting device, and dry nitrogen at a temperature of 15°C is introduced from the external air guide tube 7 under the aluminum alloy liquid surface, and the treatment time for both is 1.5Min. The ultrasonic vibration frequency is 28KHz, the vibration amplitude is 1mm, and the nitrogen gas feeding rate is 15L / Min. After the processing time is in place, the lifting device lifts the slender probe 6 to 100mm above the liquid surface, and the slurry container sends the aluminum alloy semi-solid slurry into the material chamber of t...

Embodiment 3

[0039] Embodiment 3: AZ61 magnesium alloy is used for smelting to prepare a semi-solid molded part. The liquidus temperature of AZ61 magnesium alloy is 595°C, and the solidus temperature is 470°C. The alloy is heated to 700°C in the heating furnace, and the slurry container is taken out of the molten magnesium alloy from the heating furnace.

[0040] Insert the elongated probe 6 into the magnesium alloy liquid surface 20mm below the magnesium alloy liquid surface through the lifting device, and at the same time, dry nitrogen gas at a temperature of 15°C is introduced from the elongated probe 7 into the magnesium alloy liquid surface, and the treatment time for both is 1Min. The ultrasonic vibration frequency is 50KHz, the vibration amplitude is 1mm, and the nitrogen gas feeding rate is 25L / Min. After the processing time is in place, lift the slender probe 6 to 100mm above the liquid surface by the lifting device, and the slurry container sends the magnesium alloy semi-solid s...

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Abstract

The invention belongs to the technical field of semisolid processing and casting forming of metals / alloys, and in particular relates to a preparation method of alloy semisolid slurry. According to the preparation method, a molten alloy is filled into a slurry container, at least one group of ultrasonic vibration devices is operated in the slurry container, and at least one group of cooling gases is introduced into the slurry container. The alloy semisolid slurry is prepared by changing the parameters of the ultrasonic vibration devices and the quantity of the cooling gases. A round, tiny and uniform non-dendritic crystalline structure can be quickly prepared by combining an ultrasonic acoustic streaming effect with a cooling gas cooling effect, and the introduced inert gas for cooling also a purification effect on the slurry. The preparation method provided by the invention can be used for preparing various kinds of alloy semisolid slurry of aluminum, magnesium, zinc, copper, tin and the like, and is simple, efficient and economical in process, and the prepared slurry is pure and pollution-free.

Description

technical field [0001] The invention relates to a method for preparing alloy semi-solid slurry. Background technique [0002] Semi-solid forming technology belongs to the frontier metal processing technology in the 21st century, and has achieved rapid development in recent years. Since the semi-solid forming technology breaks the traditional dendrite solidification mode, it has unique advantages in terms of composition and structure uniformity, improving the comprehensive performance of the formed part and reducing the internal defects of the workpiece. It is generally believed that the quality of semi-solid metal paste is the basis and key factor of forming technology, which requires that the grains in the paste structure be round, fine and uniform spherical grain structure. For the preparation method of semi-solid slurry, scholars at home and abroad have done a lot of research work, and proposed many preparation methods, including mechanical stirring method, electromagnet...

Claims

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Application Information

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IPC IPC(8): C22C1/00
Inventor 冯睿
Owner 冯睿
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