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Ag-Zr-Zn intermediate alloy and preparation method and application thereof

An intermediate alloy and metal mold technology, applied in the application field, can solve the problems of limiting the level of strength and toughening of magnesium alloys, hindering the application of magnesium alloys, poor refining effect, etc. Improve corrosion resistance, decrease in tensile strength, and reduce burnout

Active Publication Date: 2020-04-17
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The melting point of elemental zirconium is as high as 1855°C, and its solubility in magnesium melt is only 0.6%wt. Therefore, the refinement of magnesium alloy in the form of magnesium-zirconium master alloy has the problems of high loss rate and poor refinement effect, which greatly limits Magnesium alloy strength and toughness level hinders the application of magnesium alloy as a lightweight material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation mass percent is Ag 44%, Zr 55%, the Ag-Zr-Zn master alloy of Zn 1%, comprises the following steps:

[0027] Step 1, pretreatment, using industrial pure silver, zirconium sponge, and industrial zinc ingots as raw materials according to the proportion of Ag 44%, Zr 55%, and Zn 1%, weighed and dried in an oven at 215 ° C for 8 hours for later use;

[0028] Step 2, put the industrial pure silver and industrial zinc ingots described in step 1 into a graphite crucible, and heat it to 930°C in a vacuum consumable electrode arc melting furnace to obtain Ag-Zn melt. At this time, in the solution Add the zirconium sponge described in step 1, raise the temperature to 1230° C., and keep it warm for 2.5 hours to obtain a uniform Ag-Zr-Zn melt.

[0029] Step 3, pour the Ag-Zr-Zn melt obtained in the step 3 into a copper mold, and obtain an Ag-Zr-Zn alloy after cooling.

[0030] The melting temperature of the master alloy in this embodiment in the magnesium melt is 78...

Embodiment 2

[0032] The preparation mass percent is Ag 65%, Zr 30%, the Ag-Zr-Zn master alloy of Zn 5%, comprises the following steps:

[0033] Step 1: pretreatment, using industrial pure silver, zirconium sponge, and industrial zinc ingots as raw materials, according to the proportion of Ag 65%, Zr 30%, and Zn 5%, weigh them and dry them in an oven at 235 ° C for 6 hours for later use;

[0034] Step 2, put the industrial pure silver and industrial zinc ingots described in step 1 into a graphite crucible, and heat them in a vacuum medium frequency induction furnace to 900°C in vacuum to obtain an Ag-Zn melt; at this time, add the The zirconium sponge described above was heated up to 1150°C and kept for 2 hours to obtain a uniform Ag-Zr-Zn melt.

[0035] Step 3, pouring the Ag-Zr-Zn melt obtained in the step 3 into a metal mold, and quenching the metal mold with cold water. After cooling, Ag-Zr-Zn alloy is obtained.

[0036] The melting temperature of the master alloy in this embodiment i...

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Abstract

The invention relates to an Ag-Zr-Zn intermediate alloy and a preparation method and application thereof, belongs to the technical field of casting non-ferrous alloys, and particularly relates to thezirconium-containing intermediate alloy used for a highly alloyed low-melting-point magnesium alloy and the preparation method of the zirconium-containing intermediate alloy. The highly alloyed zirconium-containing intermediate alloy means that the zirconium mass content of the zirconium-containing intermediate alloy is not lower than 30%, and the low melting point means that the melting point ofthe zirconium-containing intermediate alloy in a magnesium melt is not higher than 790 DEG C. The highly alloyed low-melting-point zirconium-containing intermediate alloy is adopted as a Zr adding source to be added into the magnesium alloy, so that burning loss of Zr elements in the smelting process is reduced, meanwhile, the Zr elements are more dispersed in a matrix, so that the better grain refining effect is achieved, and the strengthening and toughening level of the magnesium alloy is effectively improved.

Description

technical field [0001] The invention relates to an Ag-Zr-Zn master alloy and its preparation method and application, belonging to the technical field of casting non-ferrous alloys, in particular to a zirconium-containing master alloy for highly alloyed low-melting magnesium alloys and its preparation method. The alloyed zirconium-containing master alloy means that the zirconium mass content of the zirconium-containing master alloy is not less than 30%, and the low melting point means that the melting point of the zirconium-containing master alloy in a magnesium melt is not higher than 790°C. Background technique [0002] Magnesium alloys have a hexagonal close-packed crystal structure, and the contribution of grain refinement to the strengthening and toughening of magnesium alloys is more obvious than that of body-centered cubic aluminum alloys. In addition to Mg-Al alloys, magnesium alloys rely on zirconium for grain refinement. At present, the materials used for grain ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C27/00C22C5/06C22C1/06C22C23/00
CPCC22C1/02C22C1/06C22C5/06C22C23/00C22C27/00
Inventor 陈舸肖旅李中权周海涛孙京丽姚斐
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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