A kind of rheological preparation method of aluminum-zinc alloy melt

A melt rheology and alloy technology, applied in the field of metal melt processing, can solve the problems of limited application scope, easy occurrence of hot cracking, poor casting performance, etc., and achieves high preparation efficiency, improved casting performance, and good fluidity. Effect
CN110218884BActive Publication Date: 2020-05-01SHANGHAI WANTAI AUTO PARTS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI WANTAI AUTO PARTS
Publication Date
2020-05-01

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Abstract

The invention discloses a rheological preparation method of an aluminum-zinc alloy melt, and relates to the field of metal melt processing. The method is applicable to preparation of binary or multi-component Al-Zn series alloys containing 1-30wt% of zinc. The method comprises a previous smelting technology process and a following rheological melt processing process, wherein the smelting technology process comprises the following steps: smelting of master batches; mixing and stirring; standing; refining; and slag removal and standing; the rheological melt processing process comprises the following steps: selecting optimal solid-liquid two-phase temperature interval; and carrying out mechanical stirring. According to the method, the optimal rheological processing temperature interval is selected, and branch crystals are effectively mechanically broken, so that the branch crystals can be nucleated again and multiplied; and meanwhile, the crystal gain ageing mechanism of a primary phase is started under microcosmic expansion effect of the melt so as to form spherical particles, and as a result, the purpose of improving the casting performance of the aluminum-zinc alloy is achieved, and the technical difficulties such as limited applicable scope and high production cost of the Al-Zn alloy can be solved.
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Description

technical field

[0001] The invention relates to the field of metal melt processing, in particular to a rheological preparation method of an aluminum-zinc alloy melt. Background technique

[0002] Since the beginning of the 21st century, with the continuous deepening of the country's development concept of energy saving, environmental protection, weight reduction and emission reduction, aerospace, transportation and other industries have gradually put forward higher requirements for lightweight materials and components. Aluminum alloy is widely used in aerospace, automobile, electronics and other fields because of its low density, high specific strength, good thermal and electrical conductivity, and easy refining and processing.

[0003] Aluminum-zinc alloy (Al-Zn alloy) is an important category of aluminum alloys. From the Al-Zn alloy binary phase diagram, it can be seen that Zn has a large solid solubility in Al, and its biggest feature is its natural aging characteristics....

Claims

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