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Heat-resistant and creep-preventive magnesium alloy and production thereof

A magnesium alloy and creep-resistant technology, which is applied in the field of heat-resistant and creep-resistant magnesium alloy materials, can solve problems such as difficulties in popularization and application, coarse particles of compound particles, and difficulty in alloying by adding single and double elements

Inactive Publication Date: 2006-11-08
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The specific method currently used to improve and improve the heat resistance and creep resistance of magnesium alloys is: alloying magnesium alloys, adding single elements Si, Ca, Sb, Bi, Sr, Ag, Sn, etc., or compounding two elements to It is difficult to alloy with single and double elements, and the formed compound particles are coarse and unevenly distributed
The improvement of heat resistance is also limited. Generally, this kind of magnesium alloy can only be used at the working temperature of 120-150°C. Although the addition of Re-based elements can further increase the working temperature at 150-200°C, it makes the alloy The cost increase is relatively high, and it is difficult to popularize and apply in civil industry

Method used

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  • Heat-resistant and creep-preventive magnesium alloy and production thereof
  • Heat-resistant and creep-preventive magnesium alloy and production thereof
  • Heat-resistant and creep-preventive magnesium alloy and production thereof

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Experimental program
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Effect test

Embodiment approach 1

[0020] The chemical composition (by mass percent Wt%) of the heat-resistant and creep-resistant magnesium alloy is: Al 8.50, Zn3.00, Mn1.00, Y0.30, Ni0.005, Fe0.04, Cu 0.03, and the rest is Mg.

[0021] First prepare the material according to the design composition (in terms of melt mass percentage Wt%): 1# magnesium ingot 40.00, 1# pure zinc 55.00, pure yttrium 2.50, electrolytic manganese 2.50 and carry out preheating baking, then load in the resistance furnace, According to the conventional magnesium alloy smelting method, the alloy in F 6 Melt under the protection of S gas, heat up to 740°C and keep it warm to melt the quasicrystalline master alloy liquid that meets the chemical composition design requirements. After pouring into the metal mold at 730°C, it will solidify into an ingot in the metal mold under conventional solidification conditions. Prepared a Mg 26 Zn 62 mn 2 Y 10 Master alloy ingots in the quasicrystalline phase. The photo of the metallographic struct...

Embodiment approach 2

[0024] The chemical composition of the heat-resistant and creep-resistant magnesium alloy (by mass percentage Wt%): Al4.00, Zn1.00, Mn0.30, Y1.00, Ni0.003, Fe0.03, Cu0.05, and the rest is Mg.

[0025]First prepare the materials according to the design composition (in terms of melt mass percentage Wt%): 1# magnesium ingot 46.00, 1# pure zinc 48.50, pure yttrium 5.00, electrolytic manganese 0.50 and carry out preheating baking, then load in the resistance furnace, in F 6 Under the protection of S gas, according to the conventional magnesium alloy smelting method, the furnace temperature is controlled at 780°C to melt the quasicrystalline master alloy liquid that meets the chemical composition design requirements. After pouring into the metal mold at 780°C, it solidifies in the metal mold under conventional solidification conditions. into an ingot to prepare a Mg 32 Zn 59 mn 1.0 Y 8 Master alloy ingots in the quasicrystalline phase. The photo of the metallographic structure ...

Embodiment approach 3

[0028] The chemical composition (by mass percentage Wt%) of the heat-resistant and creep-resistant magnesium alloy is: Al 6.50, Zn5.00, Mn0.70, Y0.80, Ni0.004, Fe0.05, Cu0.04, and the rest is Mg .

[0029] First prepare the materials according to the design composition (in terms of melt mass percent Wt%): 1# magnesium ingot 50.00, 1# pure zinc 43.00, pure yttrium 3.50, electrolytic manganese 3.50 and carry out preheating baking, then pack in the resistance furnace, in F 6 Under the protection of S gas, according to the conventional magnesium alloy smelting method, the quasicrystalline master alloy liquid meeting the design requirements of the chemical composition is smelted at 760°C, poured into the metal mold at 750°C, and solidified into an ingot in the metal mold under conventional solidification conditions. Prepared a Mg 35 Zn 56 mn 3.0 Y 6 Master alloy ingots in the quasicrystalline phase. The photo of the metallographic structure of this ingot is attached Figure ...

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Abstract

A heat-resistant and creep-resistant magnesium alloy and a manufacturing method thereof relate to a magnesium alloy material reinforced with quasicrystals and a manufacturing method thereof, belonging to the field of metal materials and manufacturing thereof x Zn u Mn w Y t A method for quasicrystal homogenization treatment of magnesium-based alloy melts. Its components (in terms of mass fraction Wt%) are: Al4.00~8.50, Zn1.00~5.00, Mn0.10~1.20, Re0.01~1.00, Ni0.001~0.005, Fe0.01~0.05, Cu 0.01~0.05, the rest are Mg. The as-cast microstructure is characterized by α-Mg+β-Mg 17 Al 12 + Mg dispersed uniformly in α-Mg or near the edges of the β phase x Zn u Mn w Y t It is composed of a complex structure in which three phases of quasicrystalline particles coexist; Mg x Zn u Mn w Y t The relative volume content of the quasicrystal particles in the heat-resistant and creep-resistant magnesium alloy material is 1.00-3.50%. It is suitable for large-scale industrial production and has broad market application prospects.

Description

technical field [0001] The invention relates to a heat-resistant and creep-resistant magnesium alloy and a manufacturing method thereof, which relate to a heat-resistant and creep-resistant magnesium alloy material reinforced by quasicrystals, and belong to the field of design and manufacture of metal materials. Background technique [0002] As the lightest metal engineering structural material, magnesium alloy has the advantages of high specific strength, good casting formability, excellent damping, shock absorption, noise reduction performance, strong electromagnetic shielding ability, good machining and surface decoration performance, and easy recycling. , has shown broad commercial application prospects in the fields of automobiles, electronics, aerospace, and military affairs, and has become an important material to replace aluminum alloys, steel, and engineering plastics. Its use is particularly significant for weight reduction and energy saving. Although the most effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C1/02B22D7/00B22D17/00
Inventor 张金山李秀杰梁伟许春香杜宏伟高义斌
Owner TAIYUAN UNIV OF TECH