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Magnesium alloy with good millability and preparation method of magnesium alloy plate

A magnesium alloy and performance technology, applied in the field of preparation of magnesium alloys and their sheets, can solve the problems of poor rollability and the like

Active Publication Date: 2013-11-06
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a magnesium alloy with excellent rollability and a method for preparing the sheet thereof, the purpose of which is to overcome the poor rollability of the magnesium alloy in the prior art, even at high temperature rolling and When the roll is heated, the cracking trend is still serious, and problems such as edge cracking cannot be avoided

Method used

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  • Magnesium alloy with good millability and preparation method of magnesium alloy plate
  • Magnesium alloy with good millability and preparation method of magnesium alloy plate
  • Magnesium alloy with good millability and preparation method of magnesium alloy plate

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Embodiment 1

[0026] Using a resistance melting furnace, under the protection of No. 2 flux, metal magnesium is melted and heated to 730°C for melting. According to the mass percentage of the magnesium alloy, 4% of Zn, 3% of Cu and 0.4% of Mn are added to obtain the magnesium alloy. The melt is purified with hexachloroethane and No. 2 flux, and cooled to 680°C after stirring; in SF with a volume ratio of 1:10 6 and CO 2 Under the protection of the formed mixed gas, the magnesium alloy ingot is prepared by low-frequency electromagnetic oil-slip semi-continuous casting. The casting speed is 135mm / min, the water volume is 25L / min, and the electromagnetic conditions are: the electromagnetic frequency is 30Hz, and the number of ampere turns is 5500AT. Magnesium alloy slab with specifications of 200mm×60mm×1800mm, chemical analysis composition Mg-3.35Zn-2.73Cu-0.16Mn, attached figure 1 Its typical casting structure; anneal the slab at 400°C for 10 hours, mill the surface after annealing, select ...

Embodiment 2

[0030] Using a resistance melting furnace, under the protection of No. 2 flux, metal magnesium is melted and heated to 740°C for melting. According to the mass percentage of the magnesium alloy, 4% of Zn, 3% of Cu and 0.5% of Zr are added to obtain the magnesium alloy. The melt was purified with hexachloroethane and No. 2 flux, and cooled to 685°C after stirring; in SF with a volume ratio of 1:10 6 and CO 2 Under the protection of the formed mixed gas, the magnesium alloy ingot is prepared by low-frequency electromagnetic oil-lubricating semi-continuous casting. The casting speed is 100mm / min, the water volume is 30L / min, and the electromagnetic conditions are: the electromagnetic frequency is 30Hz, and the number of ampere turns is 5500AT. Magnesium alloy slab with specifications of 200mm×60mm×1800mm and composition of Mg-4.01Zn-2.95Cu-0.3Zr according to chemical analysis, attached figure 2 Its typical casting structure; anneal the slab at 400°C for 10 hours, mill the surfa...

Embodiment 3

[0034] Using a gas-fired melting furnace, under the protection of No. 5 flux, melt the magnesium metal and heat it to 740°C to melt it. According to the mass percentage of the magnesium alloy, add 1.5% Zn, 4% Cu, and 0.8% Nd to obtain the magnesium alloy. The melt is purified with hexachloroethane and No. 5 flux, and cooled to 690°C after stirring; in SF with a volume ratio of 1:10 6 and CO 2 Under the protection of the formed mixed gas, the magnesium alloy ingot is prepared by low-frequency electromagnetic oil-lubricating semi-continuous casting. The casting speed is 100mm / min, the water volume is 30L / min, and the electromagnetic conditions are: the electromagnetic frequency is 30Hz, and the ampere-turn is 3500AT. Magnesium alloy slab with specifications of 200mm×60mm×1800mm, chemical analysis composition Mg-1.22Zn-3.62Cu-0.66Nd, attached image 3Its typical casting structure; anneal the slab at 420°C for 24 hours, mill the surface after annealing, select a sample with a siz...

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Abstract

The invention belongs to the technical fields of metal materials and metallurgy and particularly relates to a magnesium alloy with good millability and a preparation method of a magnesium alloy plate. The magnesium alloy with good millability is an Mg-Zn-Cu magnesium alloy and comprises the following components by weight percent: 1.0%-5.5% of Zn, 1.0%-4.0% of Cu, 0-1.0% of Mn or Zr, 0-1.0% of Y, Nd, Gd, Ce or MM, less than 0.005% of impurity Fe and the balance of Mg. The preparation method of the magnesium alloy plate comprises the following steps: preheating a magnesium alloy sample obtained through smelting and casting to 300-450 DEG C, and keeping the temperature for 2h; rolling at a roller temperature ranging from the room temperature to 200 DEG C, wherein the pass reduction rate is 10%-65% and the total reduction rate is 80%-90%; and thus obtaining the Mg-Zn-Cu magnesium alloy plate without edge cracks. The Mg-Zn-Cu magnesium alloy has no edge cracks in the hot rolling process; and if the rolling temperature is higher, the hot-rolled plate without edge cracks can be obtained under the condition that the roller is not heated and intermediate annealing is not performed to the plate.

Description

technical field [0001] The invention belongs to the field of metal material technology and metallurgy technology, and specifically relates to a preparation method of a magnesium alloy with excellent rollability and a plate thereof. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength, excellent vibration damping, electromagnetic shielding and machinability, and is an ideal material for lightweight structure. In recent years, people have paid great attention to the research and application of magnesium alloy. Alloys also have problems such as difficult melting and casting, difficult plastic deformation, poor high temperature creep resistance and poor corrosion resistance, which seriously restrict their application fields. Among them, the poor plastic deformation ability makes the plastic deformation process of general magnesium alloys such as rolling, extrusion and forging complex, which not only requires high temperature def...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/04C22F1/06
Inventor 乐启炽张志强宝磊崔建忠
Owner NORTHEASTERN UNIV LIAONING
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