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Composite modifier capable of improving overall performance of zinc-aluminum alloy

A technology of composite modifier and zinc-aluminum alloy, which is applied in the field of composite modifier, can solve problems such as the large solidification temperature range of zinc-aluminum alloy, poor thermal strength of zinc-aluminum alloy, and no strengthening effect, so as to reduce the crack growth rate, Effects of improving performance and delaying the time of crack generation

Inactive Publication Date: 2012-10-10
东莞市慧淳金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Another defect of zinc-aluminum alloy is its poor thermal strength. The thermal strength of zinc-aluminum alloy is very poor. It is not easy to maintain the original strength at 120°C.
This is mainly due to the following reasons: First, the inherent reasons of the material itself, the melting point of zinc itself is low, only 419 ° C; second, the main strengthening effects of the alloy are solid solution strengthening and precipitation strengthening, and these strengthening effects are very good at room temperature , but it is not good at high temperatures. 150 ° C basically has no strengthening effect; the third is that the solidification temperature range of zinc-aluminum alloy is large, and the macro-segregation is serious under conventional casting conditions, so that there are many low melting points between dendrites, such as ZA27 The solidus line is at 433°C, but under actual casting conditions, the final solidus line is approximately 380°C due to the low melting point eutectic region caused by segregation

Method used

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  • Composite modifier capable of improving overall performance of zinc-aluminum alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Industrial aluminum ingot No. A00, zinc ingot No. 0, electrolytic copper, composite modifier (including Ni20-30%, Ti15-25%, Mn5-15%, Cr5-15%, Si5-10%, Ce5-10%, La5-10%, Y1-6%, Nb1-6%, V1-6%, the rest is aluminum), pure magnesium as raw materials. The composition is calculated by weight percentage, and weighed according to the proportion of Al28%, Cu2.3% (added in the form of aluminum-copper master alloy containing 50% copper), composite modifier 0-1.2%, Mg0.015%, and the balance is Zn It is then melted in an induction melting furnace. The smelting process is as follows: first add aluminum ingots, zinc ingots, aluminum-copper intermediate alloys, and composite modifiers. After the materials are completely melted, heat them up to 600-650°C and keep them warm for 6min-8min to homogenize each element, in order to reduce the burning loss of magnesium. Use a bell jar to press magnesium into molten metal, and use 0.2% dehydrated ZnCl containing molten metal 2 For refining, u...

Embodiment 2

[0017] Industrial aluminum ingot No. A00, zinc ingot No. 0, electrolytic copper, composite modifier (Ni20-30%, Ti15-25%, Mn5-15%, Cr5-15%, Si5-10%, Ce5-10%, La5 -10%, Y1-6%, Nb1-6%, V1-6%, the rest is aluminum), pure magnesium as raw materials. The composition is calculated by weight percentage, and weighed according to the proportion of Al28%, Cu2.3% (added in the form of aluminum-copper master alloy containing 50% copper), composite modifier 0-1.2%, Mg0.015%, and the balance is Zn It is then melted in an induction melting furnace. The smelting process is as follows: first add aluminum ingots, zinc ingots, aluminum-copper intermediate alloys, and composite modifiers. After the materials are completely melted, heat them up to 600-650°C and keep them warm for 6min-8min to homogenize each element, in order to reduce the burning loss of magnesium. Use a bell jar to press magnesium into molten metal, and use 0.2% dehydrated ZnCl containing molten metal 2 For refining, use a bell...

Embodiment 3

[0020] Industrial aluminum ingot No. A00, zinc ingot No. 0, electrolytic copper, composite modifier (Ni20-30%, Ti15-25%, Mn5-15%, Cr5-15%, Si5-10%, Ce5-10%, La5 -10%, Y1-6%, Nb1-6%, V1-6%, the rest is aluminum), pure magnesium as raw materials. The composition is calculated by weight percentage, and weighed according to the proportion of Al28%, Cu2.3% (added in the form of aluminum-copper master alloy containing 50% copper), composite modifier 0-1.2%, Mg0.015%, and the balance is Zn It is then melted in an induction melting furnace. The smelting process is as follows: first add aluminum ingots, zinc ingots, aluminum-copper intermediate alloys, and composite modifiers. After the materials are completely melted, heat them up to 600-650°C and keep them warm for 6min-8min to homogenize each element, in order to reduce the burning loss of magnesium. Use a bell jar to press magnesium into molten metal, and use 0.2% dehydrated ZnCl containing molten metal 2 For refining, use a bell...

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Abstract

The invention relates to a composite modifier capable of improving overall performance of zinc-aluminum alloy, belonging to the technical field of zinc-aluminum alloy preparation. The composite modifier comprises the components in percentage by weight: 20-30% of Ni, 15-25% of Ti, 5-15% of Mn, 5-15% of Cr, 5-10% of Si, 5-10% of Ce, 5-10% of La, 1-6% of Y, 1-6% of Nb, 1-6% of V and the balance of aluminum. The modifier is blocky grey alloy, and has the particle size range of 0.5-40 mm and the melting point range of 800-1200 DEG C. By adopting the composite modifier, the overall performance of the zinc-aluminum alloy is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of zinc-aluminum alloy preparation, in particular to a composite modifier capable of improving the comprehensive performance of zinc-aluminum alloy. Background technique [0002] Zinc-aluminum casting alloy has good mechanical properties, wear resistance and corrosion resistance, low density, moderate thermal conductivity and electrical conductivity, high ultimate tensile strength, good wear resistance, good bearing capacity, non-magnetic, and does not generate electricity when collided. Spark, vibration and noise reduction performance and low cost, are more and more widely used in various fields, and bring significant economic benefits. Zinc-aluminum alloy has become a widely used alloy material due to its low energy consumption, no pollution, abundant raw materials, and good mechanical properties, process properties and machining properties. [0003] As a wear-resistant material and engineering material, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C18/04C22C1/02B22D1/00
Inventor 司松海李晓薇刘光磊杨嵩张志敏
Owner 东莞市慧淳金属制品有限公司
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