A kind of preparation method of high-zinc-magnesium alloy ingot

A magnesium alloy and magnesium-zirconium master alloy technology, applied in the field of alloy ingot preparation, can solve problems such as improper selection of casting speed and melt temperature, element segregation, a large number of cracks, etc., and achieve complete appearance, less impurity content in the melt, Tissue even effect

Active Publication Date: 2015-10-14
NORTHEAST LIGHT ALLOY CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing high-zinc-magnesium alloy ingot is easy to produce element segregation in the casting process, and a large number of cracks are generated due to improper selection of cooling water pressure, casting speed and melt temperature, and to provide a high-zinc-magnesium alloy ingot. Preparation method of magnesium alloy ingot

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  • A kind of preparation method of high-zinc-magnesium alloy ingot

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specific Embodiment approach 1

[0020] Embodiment 1: This embodiment is a method for preparing a high-zinc-magnesium alloy ingot, which is specifically completed according to the following steps:

[0021] 1. Weighing materials: according to the mass percentage of each element, Zn: 5.3%-5.7%, Zr: 0.6%-0.8% and the balance Mg, respectively weigh magnesium ingot, zinc ingot and magnesium-zirconium master alloy;

[0022] 2. Feeding: ① evenly spread a layer of 2# flux on the bottom of the melting furnace; ② add the magnesium ingots, zinc ingots and magnesium-zirconium master alloy weighed in step 1 into the melting furnace in turn; ③ put the magnesium-zirconium master alloy in the melting furnace Spread a layer of 2# flux on the upper layer;

[0023] The mass ratio of the mass of the 2# flux described in step two 1. to the magnesium ingot, zinc ingot and magnesium-zirconium master alloy weighed in step one is (0.005~0.01):1;

[0024] The mass ratio of the 2# flux described in step 2.3 to the magnesium ingot, zin...

specific Embodiment approach 2

[0041] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, according to the mass percentage of each element, it is Zn: 5.4%~5.7%, Zr: 0.6%~0.8% and balance Mg, weigh magnesium respectively Ingots, zinc ingots and magnesium-zirconium master alloys. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0042] Specific embodiment three: the difference between this embodiment and specific embodiment one to two is: the quality of the 2# flux described in step two 1. and the total amount of the magnesium ingot, zinc ingot and magnesium-zirconium master alloy weighed in step one The mass ratio is (0.006~0.008):1. Other steps are the same as those in Embodiments 1 to 2.

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Abstract

The invention discloses a preparation method of a high-zinc magnesium alloy ingot casting and relates to the preparation method of the alloy ingot casting. The invention aims to solve the problems that the existing high-zinc magnesium alloy ingot casting is easy to generate element segregation in the casting process and due to improper selection on a cooling water pressure, a casting speed and a melt temperature, a great number of cracks are generated. The preparation method comprises the following steps: 1, weighing materials; 2, feeding the materials; 3, smelting; 4, refining and standing; 5, casting. The preparation method has the advantages that 1, the high-zinc magnesium alloy ingot casting prepared by the preparation method is uniform in tissues and has no phenomena of pore loosening and slag inclusion and a melt has low impurity content; 2, the high-zinc magnesium alloy ingot casting prepared by the preparation method has a diameter of 405 mm to 485 mm, complete appearance and no obvious cracks. The high-zinc magnesium alloy ingot casting can be obtained by the preparation method.

Description

technical field [0001] The invention relates to a method for preparing an alloy ingot. Background technique [0002] High-zinc-magnesium alloy ingots belong to Mg-Zn-Zr series high-strength magnesium alloys, which are mainly used in aviation, aerospace and other fields. The main strengthening metal element in high zinc-magnesium alloy ingot is Zn, whose limit solubility is 6.2%, and the tensile and compressive strength of the alloy increase with the increase of Zn content. Due to the distribution of Zn elements and MgZn compounds along the grain boundaries in the as-cast structure of high-zinc-magnesium alloys, the tendency of hot cracking of the alloy is greatly enhanced, especially in the production of large-sized (≥Φ405mm) round ingots. cracks, resulting in furnace or scrap in batches. In addition, due to the high melting point, high specificity and easy segregation of Zr element, especially the low solubility of Zr in liquid magnesium, it is easy to form refractory com...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C22C23/04C22C1/03C22B9/05B22D7/00
Inventor石广福周元平王永宝曹永亮李广成仁海周海平蔡峰
OwnerNORTHEAST LIGHT ALLOY CO LTD