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Preparation method of thin strip-type nano Al3(Sc, Zr)/Al compound inoculant

A composite inoculant, al-4sc-4zr technology, applied in the field of aluminum-based alloys, can solve the problems of less nucleation, high cost, and many technological processes, and achieve the effect of uniform size and refinement of grains

Active Publication Date: 2019-08-16
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: provide thin strip-shaped nano-Al 3 The preparation method of (Sc, Zr) / Al composite inoculant, using in-situ autogenous method, master alloy forging and melt rapid quenching to prepare thin strip-shaped nano-Al 3 (Sc, Zr) / Al composite inoculant, this method is the first time that Sc element and Zr element are prepared into nano composite inoculant for refining aluminum alloy, which overcomes the problems of many technological processes, complicated operation, High cost, Al in the alloy 3 Aggregation and precipitation of Sc particles in the melt, Al 3 Sc particle size is too large, the nucleation particles cannot be dispersedly distributed on the matrix, the nucleation type is single, and the number of nucleation is small

Method used

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  • Preparation method of thin strip-type nano Al3(Sc, Zr)/Al compound inoculant

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Experimental program
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Effect test

Embodiment 1

[0054] The first step, the preparation of raw materials:

[0055] Weighing the required amount of commercially purchased high-purity Sc and commercially purchased high-purity Zr, according to the mass percentage of each component element in the target alloy: Sc4%, Zr4%, the rest is Al, and prepare raw materials;

[0056] The second step is to prepare bulk Al-4Sc-4Zr master alloy by in situ autogenous method:

[0057] Put all the prepared raw materials weighed in the first step above into the crucible of the MZG series high vacuum induction melting furnace for melting, the vacuum degree is 5×10 -4 Pa, the melting temperature is 2000K, and the melting time is 10 minutes. The alloy is smelted, and the bulk Al-4Sc-4Zr master alloy is obtained by the in-situ autogenous method;

[0058] In the third step, the master alloy is forged to produce a melt quenching preform:

[0059]Put the massive Al-4Sc-4Zr master alloy obtained in the second step above into a crucible-type resistance ...

Embodiment 2

[0064] The first step, the preparation of raw materials:

[0065] With embodiment 1;

[0066] The second step is to prepare bulk Al-4Sc-4Zr master alloy by in situ autogenous method:

[0067] With embodiment 1;

[0068] In the third step, the master alloy is forged to produce a melt quenching preform:

[0069] With embodiment 1;

[0070] The fourth step, melt rapid quenching treatment to prepare thin strips of nano-Al 3 (Sc,Zr) / Al composite inoculant:

[0071] The above-mentioned step 3 master alloy is forged to obtain melt quick-quenching prefabricated parts and cut into small blocks with thickness, width and length of 7mm×7mm×10mm by wire cutting machine, cleaned with alcohol, air-dried, and put into quartz glass tube Among them, the quartz glass tube is covered with an induction heating coil, which is installed in the WK-IIB vacuum quenching furnace, and the vacuum in the WK-IIB vacuum quenching furnace is pumped to 5×10 by a molecular pump. -4 Pa, during which the ar...

Embodiment 3

[0073] The first step, the preparation of raw materials:

[0074] With embodiment 1;

[0075] The second step is to prepare bulk Al-4Sc-4Zr master alloy by in situ autogenous method:

[0076] With embodiment 1;

[0077] In the third step, the master alloy is forged to produce a melt quenching preform:

[0078] With embodiment 1;

[0079] The fourth step, melt rapid quenching treatment to prepare thin strips of nano-Al 3 (Sc,Zr) / Al composite inoculant:

[0080] The above-mentioned step 3 master alloy is forged to obtain melt quick-quenching prefabricated parts and cut into small blocks with thickness, width and length of 7mm×7mm×10mm by wire cutting machine, cleaned with alcohol, air-dried, and put into quartz glass tube Among them, the quartz glass tube is covered with an induction heating coil, which is installed in the WK-IIB vacuum quenching furnace, and the vacuum in the WK-IIB vacuum quenching furnace is pumped to 5×10 by a molecular pump. -4 Pa, during which the ar...

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Abstract

The invention relates to a preparation method of a thin strip-type nano Al3(Sc, Zr) / Al compound inoculant and relates to an aluminum-based alloy. The preparation method comprises the following steps:preparing an Al-4Sc-4Zr intermediate alloy by means of an in-situ synthesis method by taking a material, including 4% of Sc, 4% of Zr and the balance Al, as a raw material; forging the intermediate alloy to prepare a melt rapid quenching prefabricated member; and rapidly quenching the melt to prepare the thin strip-type nano Al3(Sc, Zr) / Al compound inoculant. The method prepares Sc and Zr into thenano compound inoculant which is used for refining an aluminum alloy for the first time, so that defects that processes in the prior art are relatively many in flow, complex to operate and high in cost, Al3Sc particles in the alloy are gathered and settled in the melt, Al3Sc particles are oversized, nuclear particles cannot be dispersed and distributed in a matrix, nuclear types are single and nuclear quantity is relatively small are overcome.

Description

technical field [0001] The technical scheme of the present invention relates to aluminum-based alloys, specifically thin strip-shaped nano-Al 3 A preparation method of (Sc, Zr) / Al composite inoculant. Background technique [0002] Aluminum and aluminum alloys have been widely used in aviation, aerospace, automobiles, consumer electronics and other high-tech fields due to their excellent properties such as light weight, good corrosion resistance and high thermal conductivity. However, with the increasing demand for miniaturization and lightweight development of products in these industries, the disadvantage of insufficient strength of aluminum alloys has attracted more and more attention. Inoculation treatment is a classic grain refinement and material strengthening method. Compared with other grain refinement methods, such as deformation recrystallization, inoculation treatment does not require complicated rolling equipment or precise heat treatment process, only by adding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/00
CPCC22C1/026C22C1/03C22C1/06C22C21/00
Inventor 刘水清崔春翔王新赵立臣李诺
Owner HEBEI UNIV OF TECH
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