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Preparation method of Al3Sc-Al3Zr/Al composite material inoculant

A technology of al-sc-zr and composite materials, which is applied in the field of aluminum-based alloys, can solve the problems of high product cost, nucleation particle dispersion or dispersion degree, large particle size, and excessive particle size, so as to save production cost, Reduce the dosage and enhance the effect of aluminum alloy

Active Publication Date: 2019-07-12
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide Al 3 Sc-Al 3 The preparation method of Zr / Al composite material inoculant is to use in-situ synthesis method, ultrasonic treatment and rapid solidification technology to prepare thin strips of Al 3 Sc-Al 3 The method of Zr / Al composite inoculant, and the method of adding cheap Zr element to replace a part of the expensive Sc element, overcomes the problem that the nucleation particles cannot be dispersed on the matrix or the degree of dispersion is not ideal in the prior art, and the particles in the melt Aggregation and precipitation in the body and large particle size, Al in Al-Sc alloy 3 Defects of excessive Sc particle size and small quantity and high product cost

Method used

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  • Preparation method of Al3Sc-Al3Zr/Al composite material inoculant
  • Preparation method of Al3Sc-Al3Zr/Al composite material inoculant
  • Preparation method of Al3Sc-Al3Zr/Al composite material inoculant

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Embodiment 1

[0037] The first step, the preparation of raw materials:

[0038] Take the master alloy whose mass percentage is Al-5Sc and the master alloy whose mass percentage is Al-40Zr in the commercially available component content of the required amount, according to the mass percentage of each component element in the target alloy: Sc 2.00%, Zr 1.00%, and the rest Al, for raw material preparation

[0039] The second step, the in-situ synthesis preparation of bulk Al-Sc-Zr master alloy:

[0040] Put the commercially purchased Al-5Sc master alloy and commercially purchased Al-40Zr master alloy weighed in the first step above into the crucible of WK-II non-consumable vacuum electric arc furnace for melting, the vacuum degree is 5×10 -3 Pa, using high temperature of electric arc heating, the melting temperature is 2000K, melt all the master alloys added, keep it warm for 10 minutes, then cool down with the copper crucible with water cooling device in the furnace until the melted master a...

Embodiment 2

[0046] The first step, the preparation of raw materials:

[0047] Take the master alloy whose mass percentage is Al-5Sc and the master alloy whose mass percentage is Al-40Zr in the commercially available component content of the required amount, according to the mass percentage of each component element in the target alloy: Sc 1.00% for Zr, 1.00% for Zr, and the rest for Al, for raw material preparation

[0048] The second step, the in-situ synthesis preparation of bulk Al-Sc-Zr master alloy:

[0049] With embodiment 1;

[0050] The third step, ultrasonic treatment of bulk Al-Sc-Zr master alloy:

[0051] Heat the bulk Al-Sc-Zr master alloy prepared in the second step above until it melts and then perform ultrasonic treatment. The ultrasonic power is 670W, the ultrasonic frequency is 27000Hz, and the ultrasonic time is 1.5min. During this process, argon gas is introduced for protection. Pour the melt into a steel mold with a height of 120 mm and a diameter of 20 mm before it...

Embodiment 3

[0055] The first step, the preparation of raw materials:

[0056] Take the master alloy whose mass percentage is Al-5Sc and the master alloy whose mass percentage is Al-40Zr in the commercially available component content of the required amount, according to the mass percentage of each component element in the target alloy: Sc 1.00% for Zr, 2.00% for Zr, and the rest for Al, for raw material preparation

[0057] The second step, the in-situ synthesis preparation of bulk Al-Sc-Zr master alloy:

[0058] With embodiment 1;

[0059] The third step, ultrasonic treatment of bulk Al-Sc-Zr master alloy:

[0060] Heat the bulk Al-Sc-Zr master alloy prepared in the second step above until it melts, and then perform ultrasonic treatment. The ultrasonic power is 700W, the ultrasonic frequency is 30000Hz, and the ultrasonic time is 2min. During this process, argon gas is introduced for protection. Before the melt solidifies, it is poured into a steel mold with a height of 120 mm and a d...

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Abstract

The invention discloses a preparation method of an Al3Sc-Al3Zr / Al composite material inoculant, and relates to aluminum-based alloy. The method comprises the steps that raw material preparation is conducted according to the mass percentage of each element in target alloy of 1.00%-2.00% of Sc, 1.00%-2.00% of Zr and the balanced Al; in-situ synthesis preparation and ultrasound treatment of block Al-Sc-Zr intermediate alloy are conducted; a strip-shaped Al3Sc-Al3Zr composite material inoculant product is prepared through a rapid solidifying technology. The method has the advantages that part of Sc with high price is replaced by adding low-cost Zr to reduce the cost of the product, and the defects of the failure of the dispersion distribution of core forming particles on a substrate, non-idealdispersion level, aggregation sedimentation in a melt of particles, large particular size, excessively large Al3Sc particles in Al-Sc alloy and excessively low number in the prior art are overcome.

Description

technical field [0001] The technical solution of the present invention relates to aluminum-based alloys, specifically Al 3 Sc-Al 3 A preparation method of an inoculant for Zr / Al composite material. Background technique [0002] As a typical Al-Sc intermetallic compound, Al 3 There is a very small lattice mismatch δ value between Sc and α-Al, which is by far the most effective nucleation substrate for α-Al nucleation. Therefore, Sc-containing aluminum alloys usually have very fine grains. In addition, the supersaturated Al-Sc solid solution is easily decomposed into stable Al 3 The Sc precipitated phase plays an important role in dispersion strengthening. Therefore, in recent years, Sc, as a microalloying additive element for different aluminum alloys, has received more and more attention due to its remarkable grain-fine strengthening effect. But it is worth noting that in the process of microalloying, in order to achieve the best effect of refinement enhancement, the am...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/06C22C1/03B22D11/06
CPCB22D11/0611C22C1/026C22C1/03C22C1/06C22C21/00
Inventor 刘水清崔春翔王新赵立臣韩冰皓
Owner HEBEI UNIV OF TECH
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