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A kind of aluminum-scandium alloy with high scandium content and preparation method thereof

An alloy, aluminum scandium technology, which is applied in the field of high-performance aluminum alloy material preparation, achieves the effects of good composition uniformity, good machinability and favorable industrial application.

Active Publication Date: 2018-05-01
BEIJING INST OF NONFERROUS METALS & RARE EARTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the scandium content in the aluminum-scandium alloy prepared by the existing technology is in the range of 0.05% to 2.0%, and the aluminum-scandium alloy with a scandium content of more than 10% has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Pass the aluminum powder with a purity of 99.99wt% and the scandium powder with a purity of 99.9wt% through sieves with different meshes, and sieve out 200-mesh aluminum powder and 50-100-mesh scandium powder; 200-mesh aluminum powder and 50-100-mesh scandium powder Mixed in a ratio of 45:55 by mass percentage. Put the above powder into a planetary ball mill and grind it forward and reverse for 5 hours alternately, and the ball milling speed is 300r / min. Then put the ground powder into a Φ60 cemented carbide mold, and use a hydraulic press to pre-press under a pressure of 20 MPa. After pre-pressing, the mold is loaded into the sintering furnace. Vacuumize, flush the furnace with argon, and then evacuate to 1×10 -3 MPa, the heating rate is set to 100°C / min, the holding time is 30min, and the sintering pressure is 65MPa for sintering. After the program runs, fill it with argon and take it out of the furnace to obtain the aluminum-scandium alloy of the present invention...

Embodiment 2

[0032] Pass the aluminum powder with a purity of 99.999% and the scandium powder with a purity of 99.99% through sieves of different meshes to screen out 200-mesh aluminum powder and 50-100-mesh scandium powder; 200-mesh aluminum powder and 50-100-mesh scandium powder The percentage is mixed in a ratio of 40:60. Put the above powder into a planetary ball mill and grind it forward and reverse for 5 hours alternately, and the ball milling speed is 300r / min. Then put the ground powder into a Φ40 cemented carbide mold, and use a hydraulic press to pre-press under a pressure of 15 MPa. After pre-pressing, the mold is loaded into the sintering furnace. Vacuumize, flush the furnace with argon, and then evacuate to 1×10 -3 MPa, set the heating rate at 100°C / min, the holding time at 20min, and the pressure at 55MPa for sintering. After the program runs, fill it with argon and take it out of the furnace to obtain the aluminum-scandium alloy of the present invention, perform surface t...

Embodiment 3

[0035] Pass the aluminum powder with a purity of 99.99% and the scandium powder with a purity of 99.9% through sieves of different meshes to screen out 200-mesh aluminum powder and 50-100-mesh scandium powder; 200-mesh aluminum powder and 50-100-mesh scandium powder The percentage is mixed in a ratio of 35:65. The above powder was put into a planetary ball mill and ground for 3 hours, and the ball milling speed was 200r / min. Then put the ground powder into a Φ30 graphite mold, and pre-press it under a pressure of 10 MPa using a hydraulic press. After pre-pressing, the mold is loaded into the sintering furnace. Vacuumize, flush the furnace with argon, and then evacuate to 1×10 -2 MPa, set the heating rate at 100°C / min, the holding time at 10min, and the pressure at 45MPa for sintering. After the program runs, fill it with argon and take it out of the furnace to obtain the aluminum-scandium alloy of the present invention, perform surface treatment, use a sandblasting machine ...

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Abstract

The invention provides a high-scandium-content aluminum and scandium alloy and a preparing method of the alloy, and belongs to the technical field of high-performance aluminum alloy materials. The high-scandium-content aluminum and scandium alloy comprises, by weight percent, 55% to 70% of scandium and the balance aluminum. The preparing method comprises the steps of firstly, powder screening, wherein aluminum powder and scandium powder pass through screens with different meshes, and raw materials with the needed granularity are screened out; secondly, material proportioning, wherein a certain amount of aluminum powder and a certain amount of scandium powder are weighed, and the aluminum powder and the scandium powder are mixed according to a certain mass proportion; thirdly, grinding, wherein the aluminum and scandium mixed powder is put into a ball grinding machine to be sufficiently ground, and mixing is uniform; and fourthly, sintering, wherein the aluminum and scandium mixed powder which is uniform in grinding is loaded into a mold, a hydraulic machine is used for carrying out pre-pressing, shove charging and sintering program setting are carried out, and the aluminum and scandium alloy is prepared in a sintered manner. The prepared aluminum and scandium alloy has the beneficial effects of being high in compactness, high in scandium content, good in component uniformity and good in subsequent machinability, and a reliable raw material can be provided for a sputtering target material in the special field.

Description

technical field [0001] The invention relates to an aluminum-scandium alloy with high scandium content and a preparation method thereof. The alloy is mainly used for sputtering targets in special fields, and belongs to the technical field of high-performance aluminum alloy material preparation. Background technique [0002] Adding a certain amount of scandium to aluminum can refine grains, increase recrystallization temperature, improve corrosion resistance, increase strength and plasticity, etc. Therefore, aluminum scandium alloys have high strength, corrosion resistance, high temperature resistance and weldability With good comprehensive performance, it has a wide range of applications in cutting-edge technology fields such as aerospace and nuclear energy engineering, as well as transportation, household appliances and other fields. With the rapid development of science and technology, and the emphasis of various countries on the research of key materials used in key fields...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C28/00C22C1/04C23C14/34
CPCC22C1/04C22C28/00C23C14/3414
Inventor 柳旭张国清蔡正旭李刚宋文杰焦磊
Owner BEIJING INST OF NONFERROUS METALS & RARE EARTH
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