A device and method for preparing large-scale ultra-high-strength aluminum alloy continuous casting ingot

An ultra-high-strength, aluminum alloy technology, which is applied in the metal continuous casting process and the metal material processing field, can solve problems such as inability to solve large-size ingots, inability to improve temperature field, and inability to reduce liquid cavities, so as to improve material utilization, The device is simple, convenient and feasible, and the effect of improving the surface quality

Active Publication Date: 2017-10-10
XINJIANG JOINWORLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Many existing equipment and methods are used to improve the effect of electromagnetic stirring on the melt, but have little effect on the casting process after alloy melt treatment. For example, the temperature field during the cooling process cannot be improved, and the liquid cavity cannot be reduced, thereby improving the ingot structure. performance
The most important thing is that the current application of electromagnetic stirring technology in casting cannot solve some difficulties in the preparation of large-scale ingots, such as the uniformity of microstructure and properties and the cracking of large ingots

Method used

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  • A device and method for preparing large-scale ultra-high-strength aluminum alloy continuous casting ingot
  • A device and method for preparing large-scale ultra-high-strength aluminum alloy continuous casting ingot
  • A device and method for preparing large-scale ultra-high-strength aluminum alloy continuous casting ingot

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Embodiment 1

[0045] A research institution is working on a military project, developing 7075 aluminum alloy cast rods with a diameter of 500mm, and then extruding them into "S"-shaped products with a thickness of 10mm and a length of 10,000mm through a porous die, and the extrusion ratio is 20, and the product reaches the corresponding performance after post-heat treatment Indicators, the project has strict requirements on the quality of cast rods, extruded products and final products: (1) The surface quality of cast rods is required to be free of surface defects such as scratches, cracks, deep cold shuts, and large segregation tumors. Cracking: There are strict requirements on the uniformity of the internal structure, composition and performance of the ingot. In the center of the center of the upper radial side, the grain size deviation is required to be controlled within 8%, the composition deviation is controlled within 6%, and the tensile strength is controlled within 8%. ; Grain size T...

Embodiment 2

[0052] A university cooperated with a company to prepare a 7050 round ingot with a diameter of 650mm and a length of 2000mm, which has high requirements for the quality of the ingot. The main requirements are the uniformity and cracking of the ingot, and the control of the deviation of the mechanical properties of the radial structure of the ingot. Within 6%, and there should be no large wrinkles on the surface, the cutting amount should be less than 3mm, there should be no cracking, and the qualified rate should be controlled at 90%. The project is going to be done by ordinary electromagnetic stirring casting method.

[0053] The present invention has characteristics superior to ordinary electromagnetic stirring technology in many respects. In this embodiment, the ordinary electromagnetic casting technology and the method of the present invention are compared with the ingot casting requirements for the preparation project, and the specific casting implementation is as follows:...

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Abstract

The invention relates to a device and method for preparing large-scale ultra-high-strength aluminum alloy continuous casting ingots, belonging to the field of metal material processing. The device is mainly composed of a crystallizer, a hot top, an electromagnetic stirrer, a conical spiral mandrel, a graphite ring and a dummy; inside the crystallizer, a hot top is set on the upper part, a graphite ring is set on the lower part, and a conical spiral mandrel is set in the middle of the hot top. , an electromagnetic stirrer is set outside the crystallizer. The alloy melt enters the inner hot top area of ​​the crystallizer, and the melt is subjected to electromagnetic stirring and conical spiral mandrel rotation stirring coupling treatment. The melt flows out of the hot top and enters the interior of the graphite ring, and is forced to cool by one cooling. Pull down to complete the solidification and forming of the alloy ingot. The invention can improve the inhomogeneity of ingot structure, composition and performance, and can also improve the surface quality of the ingot, improve the mechanical properties, reduce the cracking phenomenon of the ingot, further reduce the energy consumption in the preparation process, and reduce the cost of the product. Improve yield.

Description

technical field [0001] The invention relates to a device and method for preparing large-scale ultra-high-strength aluminum alloy continuous casting ingots, belonging to the field of metal material processing, and in particular to the technical field of metal continuous casting technology. Background technique [0002] Semi-continuous casting has the advantages of high crystallization speed, good mechanical properties, high metal purity, can reduce the geometric percentage of cutting head and tail, and improve labor efficiency. Therefore, it is widely used in aluminum alloys. However, studies have also found that this type of preparation method is a complex dynamic solidification process, and various defects such as coarse grains, cracks, and structural composition segregation are easily formed during the solidification process. Especially in the preparation of high-alloyed ultra-high-strength aluminum alloys, dendrite segregation is more likely to occur, and strong internal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/041B22D11/114B22D11/115
Inventor 徐骏王海军张志峰李豹
Owner XINJIANG JOINWORLD CO LTD
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