Preparation method of magnesium alloy grain refining agent

A grain refiner and grain refinement technology, which is applied in the field of non-ferrous metal casting, can solve the problems of limiting the application range of magnesium alloys and poor plastic processing ability of magnesium alloys at room temperature, and achieve good grain refinement effect and low cost. The effect of low, thinning effect is obvious

Inactive Publication Date: 2017-02-22
鲅鱼圈出入境检验检疫局综合技术服务中心
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Problems solved by technology

[0003] Since magnesium is a hexagonal close-packed (HCP) structure material, its plastic deformation is limited to the basal plane {0001} slip and conical plane {10-12} twinning at room temperature, so the magnesium alloy The room temperature plastic processing ability is poor
Therefore, the processing of most magnesiu

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  • Preparation method of magnesium alloy grain refining agent
  • Preparation method of magnesium alloy grain refining agent

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Embodiment Construction

[0012] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0013] A preparation method of a magnesium alloy grain refiner, the steps are as follows:

[0014] Melt 50g of aluminum-magnesium alloy in a low-carbon steel crucible or graphite crucible using a resistance furnace. After the aluminum-magnesium alloy is melted, add 2g of magnesium carbonate powder, and after the powder is fully reacted, keep it warm at 700°C for 25 minutes and cast it into a mold. After cooling to room temperature, it is solid solution treated at 380°C for 20 hours to obtain the aluminum-containing magnesium alloy.

[0015] The microstructure of aluminum-magnesium alloy and aluminum-magnesium alloy with magnesium carbonate is equiaxed. After adding magnesium carbonate powder, the grain size of aluminum-magnesium alloy is refined from 370 μm to 117 μm, and the grain size is refined by 68.4%. . Wit...

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Abstract

The invention belongs to related technical field of nonferrous metal casting formation, and relates to a preparation method of a magnesium alloy grain refining agent. An aluminum-contained magnesium alloy is mixed with magnesium carbonate powder for smelting, is insulated by 20 minutes at 740 DEG C, is cast in a low-carbon steel mold, and is cooled to 350-400 DEG C for solid solution treatment by 16-20 hours to obtain the magnesium alloy grain refining agent. The magnesium alloy grain refining agent obtained by the preparation method is low in cost, free of pollution and obvious in refining effect. The grain size of an AZ31 magnesium alloy, without the magnesium carbonate powder, cast after insulation by 20 minutes at 740 DEG C is about 370 microns, and is shown in the drawing 1. After the magnesium carbonate powder with 0.5-5% of mass percentage is added, the grain size of the AZ31 magnesium alloy cast after insulation by 20 minutes at 740 DEG C is about 117 microns, and is shown in the drawing 2; and the grain size is refined by 68.4%. After the magnesium carbonate powder is added in other aluminum-contained magnesium alloys, the excellent grain refining effect also can be achieved.

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Application Information

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Owner 鲅鱼圈出入境检验检疫局综合技术服务中心
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