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High-wear-resistant zinc-aluminum alloy and preparation thereof

A zinc-aluminum alloy, high wear-resistant technology, applied in the field of high wear-resistant zinc-aluminum alloy and its preparation, can solve the problems of large difference in specific gravity, difficulty in adding silicon particles, uneven surface of alloy ingots, etc., and achieve excellent wear resistance. Effect

Inactive Publication Date: 2008-10-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult and complicated to add silicon particles, the distribution uniformity of silicon is poor, and the mechanical properties of the obtained materials are relatively low.
[0004] In addition, because aluminum is a light metal and zinc is a heavy metal, the specific gravity of the two is quite different, which may easily cause segregation of the composition of the alloy and make the product not meet the requirements. In addition, the alloy is cast into an ingot at one time. It is easy to form a boss at the place where the first condensation around the core makes the surface of the stripped alloy ingot uneven, resulting in difficulty in stacking or even dumping

Method used

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  • High-wear-resistant zinc-aluminum alloy and preparation thereof
  • High-wear-resistant zinc-aluminum alloy and preparation thereof
  • High-wear-resistant zinc-aluminum alloy and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0031] The composition of the hypereutectic Al-Si alloy is selected according to the silicon content required by the alloy, Al-10wt% Si and Zn-10wt% Al are synthesized: Zn-40wt% Al-2% Cu-2% Si.

[0032] The two alloys were melted separately in two electric resistance furnaces. Among them, the melting temperature of the hypereutectic Al-Si alloy is selected at 600°C, and the alloy is in a semi-solid state at this time. The crushing of the silicon phase is achieved by means of mechanical stirring, the stirring rate is 400 rpm, and the stirring time is 60 s. Zinc-aluminum alloy ZA10 is heated to a molten state at a heating temperature of 600°C.

[0033] Pour the copper and molten ZA10 alloy solution into the prepared semi-solid hypereutectic Al-10Wt% Si alloy at a temperature of 600°C, stir, and then pour into a mold to cast an alloy rod ingot of Φ30×150mm.

[0034] The alloy ingot is loaded into the medium frequency induction furnace with automatic temperature control by adjus...

Embodiment example 2

[0038]The composition of the hypereutectic Al-Si alloy is selected according to the silicon content required by the alloy, Al-20wt% Si and Zn-15wt% Al are synthesized: Zn-32wt% Al-4% Cu-6% Si.

[0039] The two alloys were melted separately in two electric resistance furnaces. The melting temperature of the hypereutectic aluminum-silicon alloy is selected at 620°C. At this time, the alloy is in a semi-solid state, and the silicon phase is broken by mechanical stirring. The stirring rate is 400rpm and the stirring time is 300s. The zinc-aluminum alloy ZA10, another component, is heated to a molten state at a heating temperature of 600°C.

[0040] Pour the copper and molten ZA15 alloy solution into the prepared semi-solid hypereutectic Al-20Wt% Si alloy at a temperature of 620°C, stir, and then pour into a mold to cast an alloy rod ingot of Φ30×150mm.

[0041] The alloy ingot is loaded into the medium frequency induction furnace with automatic temperature control by adjusting th...

Embodiment example 3

[0045] The composition of the hypereutectic Al-Si alloy is selected according to the silicon content required by the alloy, Al-20wt% Si and Zn-20wt% Al are synthesized: Zn-25wt% Al-5% Cu-8% Si.

[0046] The two alloys were melted separately in two electric resistance furnaces. The melting temperature of the hypereutectic aluminum-silicon alloy is selected at 650°C. At this time, the alloy is in a semi-solid state, and the silicon phase is broken by mechanical stirring. The stirring rate is 400rpm and the stirring time is 600s. The new aluminum alloy ZA10 with another component is heated to a molten state at a heating temperature of 650°C.

[0047] Pour copper and molten ZA20 alloy solution into the prepared semi-solid hypereutectic Al-20Wt% Si alloy at a temperature of 650°C, stir, and then pour into a mold to cast an alloy rod ingot of Φ30×150mm.

[0048] Load the alloy ingot into the medium-frequency induction furnace that automatically controls the temperature by adjusting...

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Abstract

The invention discloses highly wear-resistant allumen. The invention is characterized in that according to the weight percentage, the allumen comprises the following components: 25 to 40 percent of Al, 1 to 5 percent of Cu, 1 to 10 percent of Si, and Zn as the residual. In the invention, spray forming and the hot extrusion method of multi-step accumulated deformation are utilized to achieve small size and even distribution of silicon grains which can not be achieved through common casting, and thereby the Zn-Al-Cu-Si alloy with good wear resistant property can be obtained.

Description

technical field [0001] The invention relates to a high wear-resistant zinc-aluminum alloy and a preparation method thereof. Background technique [0002] Zinc-aluminum alloy instead of bronze alloy can save a lot of copper resources for the country, and can alleviate the problem of copper resource shortage in our country; zinc-aluminum alloy material has good toughness and strong mold filling ability, and can be precision cast with metal mold, graphite mold, gypsum mold, etc. , the surface roughness and dimensional accuracy of the produced castings are close to the level of die castings. [0003] Aluminum-silicon alloys, like zinc-aluminum alloys, have a wide range of industrial applications. Usually, the addition of silicon to aluminum-silicon alloys greatly improves the mechanical properties of the alloys, such as strength, stiffness (elastic modulus), etc., so commonly used Cast aluminum-silicon alloys such as A356, A357 and A359 are widely used in automotive parts and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/04B23P17/00C22F1/16
Inventor 严彪杨诚笑陈兴赵慎强
Owner TONGJI UNIV
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