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Mg alloys containing misch metal, manufacturing method of wrought mg alloys containing misch metal, and wrought mg alloys thereby

A technology of mixed rare earth and rare earth alloys, which is applied in the fields of telephone communication, electrical components, branch equipment, etc., can solve the problems of restricting grain refinement, grain refinement restriction, and thickness reduction restriction, etc., and achieves excellent formability. , high mechanical properties, improved formability

Inactive Publication Date: 2008-03-05
GALLOY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, thickness reduction is limited by severe cracks and hence grain refinement
In other words, the solid solution alloy is constrained by internal sources capable of recrystallization, and thus has certain limitations on grain refinement

Method used

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  • Mg alloys containing misch metal, manufacturing method of wrought mg alloys containing misch metal, and wrought mg alloys thereby
  • Mg alloys containing misch metal, manufacturing method of wrought mg alloys containing misch metal, and wrought mg alloys thereby
  • Mg alloys containing misch metal, manufacturing method of wrought mg alloys containing misch metal, and wrought mg alloys thereby

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Embodiment approach

[0046] The magnesium alloy containing mischmetal according to the present invention has Mg 100-x-y-z A x B y C z The formula expressed, wherein A is zinc (Zn) or aluminum (Al); B is misch; C is selected from manganese (Mn), nickel (Ni), copper (Cu), tin (Sn), yttrium (Y ), phosphorus (P), silver (Ag) and strontium (Sr) at least one element; and x, y and z satisfy 0 atomic % ≤ x ≤ 6 atomic %, 0.8 atomic % ≤ y ≤ 7 atomic % and a composition of 0 atomic % ≤ z ≤ 2 atomic %.

[0047] When the mischmetal-containing magnesium alloy according to the invention is solidified by casting, the magnesium-rich solid solution (α-magnesium) constitutes the matrix structure. The second phase is crystallized by mixed rare earth (element B) to form a network structure or dispersed phase composited with the magnesium matrix. The network structure is stable at high temperatures, thereby providing excellent mechanical properties. In addition, group A and group C elements can generate a tertiar...

Embodiment 1

[0057] Molten metals of the magnesium alloy compositions given in Table 1 below were prepared and castings were obtained by casting. More specifically, the graphite crucible was heated at a temperature of 700° C. in an induction furnace. Magnesium is melted in this graphite crucible, and then other additives are added. This forms a molten alloy, which is poured into a mold preheated to 1200°C. This forms the casting.

[0058] In the compositions specified in Table 1, B refers to cerium-based misch metal in atomic %. The second phase generated by the addition of element B is Mg 12 Ce phase. Figure 1 is a scanning electron micrograph of alloy 3, showing the α-magnesium structure and Mg 12 The Ce phase forms a network structure. Since the structure forming the network structure is stable at high temperature, deformation of the α magnesium structure can be suppressed, so they exhibit high strength at high temperature. Therefore, as the amount of B element increases, Mg 12 ...

Embodiment 2

[0068] Figure 2 is a photograph of a molten metal in which 2% by weight of calcium (Ca) was added to Alloy 9 listed in Table 1 and melted in air, showing that by adding calcium (Ca) to a magnesium alloy composition (such as Alloy 9), ) after which the magnesium alloy composition can be melted and cast in air. As can be seen from FIG. 2, when the magnesium alloy composition was melted in air, it was found that no thick oxide was formed on the surface of the molten metal.

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Abstract

There are provided a magnesium alloy with a misch metal, a method of producing a wrought magnesium alloy with a misch metal, and a wrought magnesium alloy produced thereby, in which a great deal of misch metal is added to magnesium, and thus refractory eutectic phases or multi-phases are formed into a stable network structure or a stable dispersed phase, thereby inhibiting deformation of a magnesium matrix at a high temperature to maintain a high strength. The magnesium alloy with the misch metal has the formula of Mg100-x-y-z AxByCz , where A is zinc (Zn) or aluminum (Al); B is the misch metal; C is at least one element selected from the group consisting of manganese (Mn), nickel (Ni), copper (Cu), tin (Sn), yttrium (Y), phosphor (P), silver (Ag), and strontium (Sr); and x, y and z are the compositions of 0 at% = x =6 at%, 0.8 at% = y =7 at%, and 0 at% = z =2 at%, respectively.

Description

technical field [0001] The present invention relates to a mischmetal-containing magnesium alloy, wherein a large amount of mischmetal is added to magnesium, whereby the mischmetal-containing magnesium alloy has a stable network structure or dispersed phase at high temperature, thereby exhibiting excellent mechanical properties performance. Furthermore, the present invention relates to a method for producing wrought magnesium alloys by hot extrusion and hot rolling to granulate the solidified structure, i.e. the secondary phase or multiple phases, and to ultrafine the matrix Granules, the invention also relates to wrought magnesium alloys produced by said method. Background technique [0002] At present, as environmental and energy-saving issues are attracting attention worldwide, it is necessary to reduce the weight of components. There is a growing need to address environmental pollution problems caused by carbon dioxide generated in road, air and rail transport, as well ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00
CPCH04M1/0237
Inventor 裵东炫权振旭金律
Owner GALLOY TECH
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