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Magnesium alloy with warm extrusion property and preparation method of magnesium alloy extrusion material

A magnesium alloy and warm extrusion technology is applied in the field of preparation of magnesium alloys and extruded materials, which can solve the problems of poor corrosion resistance, low efficiency, low strength of magnesium-lithium alloys, etc., achieve high surface quality and ease extrusion. High peak force effect

Active Publication Date: 2012-05-02
中天时代镁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Traditionally, research on improving the plastic deformation capacity of magnesium alloys has focused on the optimization of deformation processes and conditions such as deformation temperature, deformation amount and deformation rate, and stress state, but with little success.
Improving the plasticity of magnesium alloys through alloying is another way, among which Mg-Li alloy is a typical representative, but magnesium-lithium alloys have low strength and poor corrosion resistance. As a result, the alloy is expensive and has not been widely used except for a small amount of military applications.

Method used

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  • Magnesium alloy with warm extrusion property and preparation method of magnesium alloy extrusion material
  • Magnesium alloy with warm extrusion property and preparation method of magnesium alloy extrusion material
  • Magnesium alloy with warm extrusion property and preparation method of magnesium alloy extrusion material

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Embodiment 1

[0032] Using a resistance melting furnace, under the protection of the 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 and 3% of Cu are added, and the resulting magnesium alloy melt is used six Ethyl chloride and No. 5 flux are purified, and the melt is cooled to 666°C after being stirred. In the 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 applied electromagnetic conditions are: electromagnetic frequency 30Hz, ampere-turn number 6000AT, casting speed 103mm / min, water volume 65L / min, and the specification is A magnesium alloy ingot with a diameter of 165mm and a height of 1800mm, whose chemical analysis composition is Mg-4.26Zn-3.06Cu, with Figure 4 Its typical cast structure; it was annealed at 410±10 for 10 hours. After the ann...

Embodiment 2

[0037] Using a resistance melting furnace, under the protection of No. 5 flux, metal magnesium is melted and heated to 740 ° C for melting. According to the mass percentage of magnesium alloy, 4% Zn, 3% Cu and 0.4% Y are added to obtain magnesium. The alloy melt is purified with hexachloroethane and No. 5 flux, the melt is cooled to 670°C after stirring, and the volume ratio is 1:10 in SF6 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 applied electromagnetic conditions are: electromagnetic frequency 30Hz, ampere-turn number 6000AT, casting speed 80mm / min, water volume 60L / min, and the specification is A magnesium alloy ingot with a diameter of 165mm and a height of 1800mm, whose chemical analysis composition is Mg-3.91Zn-2.78Cu-0.31Y, with Figure 5 It is a typical cast structure; it is annealed at 410±10°C for 10 hours; after the annealing is completed,...

Embodiment 3

[0040] Mg-3.91Zn-2.78Cu-0.31Y magnesium alloy extruded rods were prepared according to the method of Example 2, and the rods were subjected to T6 heat treatment, solid solution at 400°C for 2 hours, and aged at 200°C for 30h. The extruded bar is sampled and processed as attached image 3 The tensile sample shown was stretched at room temperature on an Instron8032 stretching machine with a stretching speed of 2mm / min. Its T6 heat treatment state room temperature tensile mechanical properties are: R m =279MPa, yield strength R p0.2 =235MPa, elongation A=32.3%.

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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 warm extrusion property and a preparation method of a magnesium alloy extrusion material. The magnesium alloy is an Mg-Zn-Cu (or Mg-Zn-Ni) magnesium alloy and comprises the following components by weight percent: 3.0%-6.0% of Zn, 1.5%-5.0% of Cu or Ni, 0-1.0% of Y, Nd, Gd, Ce or MM and the balance Mg. The preparation method of the magnesium alloy extrusion material comprises the following steps: preparing magnesium alloy ingots by adopting a low-frequency electromagnetic oil lubricating semicontinuous casting method; performing warm extrusion to the Mg-Zn-Cu (or Mg-Zn-Ni) magnesium alloy ingots at 160-240 DEG C by using an indirect extrusion device, wherein the extrusion ratio is 8-20 and the extrusion speed is 4.5-8m / min; and thus obtaining Mg-Zn-Cu (or Mg-Zn-Ni) magnesium alloy extrusion bars. After the Mg-Zn-Cu (or Mg-Zn-Ni) magnesium alloy extrusion bars are subjected to T4 or T6 heat treatment, the elongation rate is 20%-35%.

Description

technical field [0001] The invention belongs to the technical field of metal materials and metallurgy, and in particular relates to a magnesium alloy with warm extrusion properties and a preparation method of the extruded material 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 structures. In recent years, the research and application of magnesium alloys have been highly valued. As we all know, magnesium has a close-packed hexagonal lattice structure. During plastic deformation at room temperature, only basal plane slip can occur, and there are only two independent slip systems. Therefore, the plasticity at room temperature is low, and cold processing is generally not suitable. In the industry, hot processing is often used. , the production of magnesium alloy deformed materials at a temperature of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/02C22C1/06C22F1/06C21D8/06
Inventor 乐启炽张志强崔建忠
Owner 中天时代镁业有限公司
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