Preparation Technology of Low Melting Point Alloy Semi-solid Melt

Abstract

The invention discloses a process for preparing a semi-solid melt of a low melting point alloy, comprising the following steps: a. alloy smelting; heating and smelting the low melting point alloy into a semi-solid melt; b. injecting the melt; passing the semi-solid melt through a jet tube For ejection, the injection pipe is driven to swing by the swing mechanism, so that the semi-solid melt is ejected by the swing of the injection pipe; c. The melt is stirred; the semi-solid melt ejected from the injection pipe enters the mixing chamber, and the The mixing chamber is spiral-shaped, and the stirring chamber is provided with a first temperature control area, a second temperature control area, a third temperature control area and a fourth temperature control area in sequence from top to bottom, wherein the first temperature control area is lower than The alloy solid phase temperature, the second temperature control area is higher than the alloy liquid phase temperature, the third temperature control area is located between the alloy solid phase temperature and the alloy liquid phase temperature, and the fourth temperature control area is normal temperature. The invention has simple process steps and convenient operation, and the composition of the semi-solid alloy is uniform and the roundness of crystal nuclei is good.

Description

technical field [0001] The invention relates to the technical field of rheological deformation, in particular to a process for preparing a semi-solid melt of a low melting point alloy. Background technique [0002] Semi-solid alloy is a kind of "soft matter" between liquid and solid. It can be transported like a solid when it is still, and can be continuously deformed like a fluid under the action of an external force. Its internal feature is that (near) spherical crystals are uniformly suspended in the liquid. in phase. [0003] Environmentally friendly low-melting point alloys can be used to prepare semi-solid metals, and low-melting point alloys can undergo liquid-solid phase transitions within 100°C. The existing low-melting point semi-solid alloys need to go through multiple processes to prepare the solid alloys into semi-solid alloys. The process is complicated and the degree of automation is low. Each process is manually operated, which is labor-intensive and consume...

AI Technical Summary

Problems solved by technology

However, the semi-solid melt produced by mechanical stirring has disadvantages such as uneven composition and poor roundness of crystal nuclei, and the preparation device is not easy to clean

Electromagnetic stirring and ultrasonic stirring devices still have stirring dead zone, low utilization rate of alloy and high preparation cost

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