Zinc alloy and preparation method therefor

Patent metadata

Field	Value
Publication number	US-10280484-B2
Application number	US-201314443975-A
Country	US
Kind code	B2
Filing date	Nov 19, 2013
Priority date	Nov 19, 2012
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

The present invention provides a zinc alloy with improved alloy characteristics such as fluidity, castability, mechanical properties, corrosion resistance and elongation, and a preparation method therefor. The method for preparing the zinc alloy, according to one aspect of the present invention, comprising the steps of: providing zinc and a magnesium master alloy including a calcium-based compound; and forming a molten metal in which the magnesium master alloy and the zinc are melted; and casting the molten metal. The zinc alloy, according to another aspect of the present invention, includes a zinc base and the calcium-based compound present in the zinc base, wherein magnesium is applied to the zinc base.

First claim

What is claimed is:

1. A preparation method for a zinc alloy, the method comprising:
providing a zinc;
providing a magnesium master alloy that includes a calcium-based compound;
forming a molten metal in which the magnesium master alloy and the zinc are melted; and
casting the molten metal,
wherein the providing of the magnesium master alloy comprises:
forming a magnesium melt by melting the pure magnesium or the magnesium alloy;
adding a calcium-based additive to the magnesium melt; and
stirring the magnesium melt and the calcium-based additive in an upper portion of the magnesium melt,

wherein the calcium-based additive is powder,
wherein the calcium-based additive is added in a range from 0.001 to 30 weight % with respect to the pure magnesium or the magnesium alloy,
wherein the stirring is performed in the upper portion of which a depth is about 10% of a total depth of the magnesium melt from the surface thereof, and
wherein a plurality of particles of the calcium-based compound are disposed inside grains of the zinc alloy.

2. The method of claim 1 , wherein the forming of the molten metal comprises:
forming a zinc molten metal by melting the zinc; and
adding the magnesium master alloy into the zinc molten metal and meting the magnesium master alloy.

3. The method of claim 1 , wherein the forming of the molten metal comprises:
inputting the magnesium master alloy and the zinc into a melting furnace; and
melting the magnesium master alloy and the zinc together.

4. The method of claim 1 , wherein the magnesium master alloy is 0.01 through 46 weight % in the zinc alloy.

5. The method of claim 4 , wherein the magnesium master alloy is 5 through 30 weight % in the zinc alloy.

6. The method of claim 1 , wherein the magnesium alloy comprises aluminum.

7. The method of claim 6 , wherein the calcium-based additive comprises at least one of alkali earth metal oxides.

8. The method of claim 7 , wherein the alkali earth metal oxide is calcium oxide.

9. The method of claim 7 , wherein the calcium-based compound is formed by reacting calcium provided by the calcium-based additive with an element in the pure magnesium or the magnesium alloy.

10. The method of claim 9 , wherein the calcium-based compound comprises at least one of a Mg—Ca compound, an Al—Ca compound and a Mg—Al—Ca compound.

11. The method of claim 10 , wherein the Mg—Ca compound comprises Mg 2 Ca.

12. The method of claim 1 , wherein the zinc is pure zinc or a zinc alloy.

Assignees

• Korea Inst Ind Tech

Inventors

• Kim Shae K

Classifications

• C22C1/03 Primary

  using master alloys · CPC title

• B22D21/027

  Casting heavy metals with low melting point, i.e. less than 1000 degrees C, e.g. Zn 419 degrees C, Pb 327 degrees C, Sn 232 degrees C · CPC title

• C22C18/00 Primary

  Alloys based on zinc · CPC title

• C22C1/06

  with the use of special agents for refining or deoxidising · CPC title

• C22C1/1084

  by mechanical alloying (blending, milling) · CPC title