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Die-cast zinc alloy with high flowability and preparation method thereof

A high fluidity, zinc alloy technology, applied in the field of metal materials, to achieve grain refinement, improve comprehensive mechanical properties, and save costs

Active Publication Date: 2015-06-03
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In public publications at home and abroad, there has been no report on adding Al-5Ti-B to die-casting zinc alloys to improve the fluidity of the alloy.

Method used

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  • Die-cast zinc alloy with high flowability and preparation method thereof
  • Die-cast zinc alloy with high flowability and preparation method thereof
  • Die-cast zinc alloy with high flowability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Pure Zn ingot with a purity greater than 99.97%, pure aluminum ingot with a purity greater than 99.7%, Al-11.07wt.%Mg master alloy, Al-37.4wt.%Cu master alloy, Zn-1wt.%Li master alloy and Al- 5Ti-B intermediate alloy is used as the raw material. First put the Al ingot into the melting furnace and raise the temperature to 700°C-720°C. After part of the aluminum liquid appears, add the covering agent, and cool down to 650°C-660°C after the Al ingot is completely melted. , adding Zn ingot, Al-Mg and Al-Cu master alloy, after melting, the pre-alloy liquid is obtained, the mass percentage of each element in the pre-alloy liquid is: Al4.53%, Mg0.02%, Cu0.5%, Li0 .02%, the total content of Pb, Cd, Fe, Sn unavoidable impurity elements is less than 0.02%, and the balance is Zn; use 0.3% NH in the total weight of the pre-alloying liquid 4 The Cl refining agent refines the pre-alloy liquid and removes slag; at 680°C-700°C, add Al-5Ti-B master alloy with a total weight of 0.6% of t...

Embodiment 2

[0050] Pure Zn ingot with a purity greater than 99.97%, pure aluminum ingot with a purity greater than 99.7%, Al-11.07wt.%Mg master alloy, Al-37.4wt.%Cu master alloy, Zn-1wt.%Li master alloy and Al- 5Ti-B intermediate alloy is used as the raw material. First put the Al ingot into the melting furnace and raise the temperature to 680°C-700°C. After part of the aluminum liquid appears, add the covering agent and cool down to 670°C-680°C after the Al ingot is completely melted. , adding Zn ingot, Al-Mg and Al-Cu master alloy, after melting, the pre-alloy liquid is obtained, the mass percentage of each element in the pre-alloy liquid is: Al4.51%, Mg0.04%, Cu0.6%, Li0 .02%, the total content of Pb, Cd, Fe, Sn unavoidable impurity elements is less than 0.02%, and the balance is Zn; use 0.3% NH in the total weight of the pre-alloying liquid 4 The Cl refining agent refines the pre-alloy liquid and removes slag; at 680°C-700°C, add Al-5Ti-B master alloy with a total weight of 1.5%, stir...

Embodiment 3

[0052] Pure Zn ingot with a purity greater than 99.97%, pure aluminum ingot with a purity greater than 99.7%, Al-11.07wt.%Mg master alloy, Al-37.4wt.%Cu master alloy, Zn-1wt.%Li master alloy and Al- 5Ti-B intermediate alloy is used as the raw material. First put the Al ingot into the melting furnace and raise the temperature to 680°C-700°C. After part of the aluminum liquid appears, add the covering agent, and cool down to 660°C-670°C after the Al ingot is completely melted. , adding Zn ingots, Al-Mg and Al-Cu master alloys, after melting, a pre-alloy liquid is obtained, and the mass percentages of each element in the pre-alloy liquid are: Al4.52%, Mg0.06%, Cu0.5%, Li0 .01%, the total content of Pb, Cd, Fe, Sn unavoidable impurity elements is less than 0.02%, and the balance is Zn; the pre-alloying liquid is refined with NH4Cl refining agent with a total weight of 0.3% of the pre-alloying liquid, and the slag is removed; at 690 ℃-700℃, add Al-5Ti-B master alloy of 0.9% of the ...

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Abstract

The invention discloses die-cast zinc alloy with high flowability and a preparation method thereof. The alloy comprises the components by weight percent: 4.51-6.0% of Al, 0.01-0.08% of Mg, 0.5-0.7% of Cu, 0.01-0.02% of Li, 0-0.1% of Ti, 0-0.02% of B, less than 0.02% of inevitable impurity elements such as Pb, Cd, Fe, Sn in total, and the balance of Zn. The preparation method comprises the steps of: firstly, putting an Al ingot into a smelting furnace, heating to 680-720 DEG C; adding a covering agent after a part of molten aluminum appears; cooling to 650-680 DEG C after the Al ingot is completely melted; adding a Zn ingot, Al-Mg, Al-Cu and Zn-Li middle alloy, refining and drossing; adding B and Ti elements, agitating, drossing and cooling to 420-560 DEG C; and stewing, drossing and casting. Compared with common die-cast zinc alloy, the flowability of the die-cast zinc alloy provided by the invention can be improved by over 70%; the grain size of the die-cast zinc alloy is effectively refined; the comprehensive mechanic performance of the alloy is improved.

Description

technical field [0001] The invention relates to a die-casting zinc alloy with high fluidity and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] Zinc is an important raw material for non-ferrous metals. At present, zinc is second only to copper and aluminum in the consumption of non-ferrous metals. It has good calenderability, wear resistance and corrosion resistance, and can be made into alloys with better physical and chemical properties with various metals. Compared with other non-ferrous metal alloys, die-casting zinc alloy has obvious advantages: cheap material, low melting point, low energy consumption, good mechanical properties, wear resistance and corrosion resistance, vibration and noise reduction performance, ultimate tensile strength, It has the characteristics of good bearing capacity and no iron absorption during melting and die casting. Therefore, die-casting zinc alloy is being more and more wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/04C22C1/03
Inventor 李红英蒋浩帆李振国何守强
Owner CENT SOUTH UNIV
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