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Preparation of aluminium titanium carbide intermediate alloy grain refiner in the ultrasonic field

An intermediate alloy and refiner technology, applied in the field of grain refinement of aluminum and aluminum alloys, can solve the problems of pinhole defects in aluminum foil, reduce the pinhole rate of aluminum foil, and have a large size distribution range, and achieve the effect of reducing pinhole rate.

Inactive Publication Date: 2005-06-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems that existing master alloy refiners are prone to aggregation of nucleation phases, easy to aggregate after being used for aluminum grain refinement, large size distribution range of grain core particles, and easy to cause pinhole defects in aluminum foil, the present invention adopts the method of The ultrasonic field acts on the whole process of preparation of the master alloy refiner. By designing the alloy composition and the process parameters of the ultrasonic field, the TiC particles of the nucleation phase in the master alloy refiner are uniformly and discretely distributed without forming large compact groups, and the maximum The aggregate size is stable below 2-3μm, far smaller than the current international advanced level of 2-10μm, thus laying the foundation for reducing the pinhole rate of aluminum foil

Method used

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  • Preparation of aluminium titanium carbide intermediate alloy grain refiner in the ultrasonic field
  • Preparation of aluminium titanium carbide intermediate alloy grain refiner in the ultrasonic field
  • Preparation of aluminium titanium carbide intermediate alloy grain refiner in the ultrasonic field

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Experimental program
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Effect test

Embodiment 1

[0055] When applied to high-purity aluminum, its main components are:

[0056] Component Content (weight%)

[0057] Aluminum (Al) 93.0

[0058] Titanium (Ti) 6.5

[0059] Carbon (C) 0.5

[0060] The structure of the master alloy prepared in the early stage of the reaction is as follows figure 1 -As shown in (a, b), where the white particles are TiC, figure 1 (a) is the structure of the AlTiC master alloy without the action of the ultrasonic field, figure 1 (b) is the structure of the AlTiC master alloy subjected to the action of the ultrasonic field.

Embodiment 2

[0062] When applied to industrial pure aluminum, its main components are:

[0063] Component Content (weight%)

[0064] Aluminum (Al) 94.0

[0065] Titanium (Ti) 5.5

[0066] Carbon (C) 0.5

[0067] The structure of the master alloy prepared in the later stage of the reaction is as follows figure 2 -As shown in (a, b), where the white particles are TiC, figure 2 (a) is the structure of the AlTiC master alloy without the action of the ultrasonic field, figure 2 (b) is the structure of the AlTiC master alloy subjected to the action of the ultrasonic field.

Embodiment 3

[0069] When applied to aluminum alloys of grades above 1100, its main components are:

[0070] Component Content (weight%)

[0071] Aluminum (Al) 95.8

[0072] Titanium (Ti) 4.0

[0073] Carbon (C) 0.2

[0074] The microstructure of the master alloy prepared after the reaction is completed and heated up to 1100°C and then kept for standing still is as follows: image 3 -As shown in (a, b), where the white particles are TiC, image 3 (a) is the structure of the AlTiC master alloy without the action of the ultrasonic field, image 3 (b) is the structure of the AlTiC master alloy subjected to the action of the ultrasonic field.

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Abstract

The invention relates to the composition, structure characteristics and preparation method of a new type of aluminum-titanium-carbon master alloy grain refiner and its application to aluminum and aluminum alloy grain refinement methods and effects. The present invention proposes a composition of an aluminum-titanium-carbon master alloy refiner prepared under the action of an ultrasonic field, which is characterized in that the main component of this type of refiner only needs to include aluminum (Al) , Titanium (Ti), carbon (C) without the need for other additional components. The method for preparing an aluminum-titanium-carbon master alloy under the action of an ultrasonic field proposed by the present invention is characterized in that raw materials such as pure aluminum ingot, potassium fluorotitanate, and graphite carbon are prepared according to the pre-designed master alloy composition; The aluminum ingot is melted by internal heating, and then various raw materials are added; ultrasonic waves are added to the melt that starts to react; after the reaction is completed, the temperature is raised, kept warm, left still, and slag is removed, and then cast into ingots or continuously cast and rolled into wire rods, thereby Get the required master alloy refiner with various components and shapes.

Description

technical field [0001] The invention relates to the composition and preparation method of a novel aluminum-titanium-carbon master alloy grain refiner and its application to aluminum and aluminum alloy grain refinement methods and effects. Background technique [0002] In the global aluminum foil processing industry, there is still a significant quality problem: there are different degrees of "pinholes" in the finished aluminum foil products of various countries. [0003] There are two main causes of pinholes: one is that pinholes (referred to as This type of influencing factors is the first type of influencing factors, and the pinholes generated thereby are the first type of pinholes); the second is that after adding the Al5Ti1B master alloy refiner to the melt, in the refined slab grains , core TiB 2 Generally, it exists in aggregates (also known as clusters) of different sizes (1-10 μm), and after final rolling to a net size (such as 5-7 μm), a part of the aggregated, ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/20C22C1/06
Inventor 李建国叶炜李黎黄敏
Owner TSINGHUA UNIV
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