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High-performance magnesium base alloy material and method for preparing same

A magnesium-based alloy, high-performance technology, applied in the field of material science to achieve the effects of small macrostructure, excellent thermal stability, and high tensile mechanical properties

Inactive Publication Date: 2012-11-28
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the deficiencies existing in the existing deformed magnesium alloy materials, in order to solve the technical problem of obtaining a large number of fine and thermally stable reinforcements under the deformed shape and thus obtaining fine recrystallized macrostructures to improve the service performance of magnesium alloys, Provided is a high-performance magnesium-based alloy material and a preparation method thereof

Method used

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  • High-performance magnesium base alloy material and method for preparing same
  • High-performance magnesium base alloy material and method for preparing same

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Embodiment 1

[0014] Use pure Mg-10Er master alloy and pure Cu, Ag elements to prepare alloy elements according to 87Mg-10Er-2Cu-1Ag (mass ratio). Using ordinary casting method, melting at 760 degrees, heat preservation for 20 minutes and casting into rods with a diameter of 50mm. Then carry out homogenization treatment at 450°C / 24h; then carry out hot extrusion at 430°C, the extrusion ratio is 12:1, and the extrusion speed is 5mm / min. The extruded rods are air-cooled. The hot-extruded alloy maintains high tensile mechanical properties in a wide temperature range (room temperature to 350°C). At room temperature, the tensile strength is 373MPa, the yield strength is 232MPa, and the tensile elongation is 14.5%. see figure 1 , Comparison of plasticity and strength of hot-extruded multi-component Mg-Er-Cu-Ag phase and binary Mg-Er alloy at room temperature; figure 2 It is a transmission electron micrograph of hot-extruded multi-component Mg-Er-Cu-Ag.

Embodiment 2

[0016] Use pure Mg-8Er master alloy and pure Cu, Ag elements to prepare alloy elements according to 89Mg-8Er-2Cu-1Ag (mass ratio). Smelting at 760 degrees, heat preservation for 20 minutes and casting into rods with a diameter of 50mm. Then carry out homogenization treatment at 450°C / 24h. Then, hot extrusion was carried out at 430° C., the extrusion ratio was 12:1, and the extrusion speed was 5 mm / min. The extruded rods are air-cooled. The hot-extruded alloy maintains high tensile mechanical properties in a wide temperature range (room temperature to 350°C). At 300°C, the tensile strength is 161MPa, the yield strength is 148.54MPa, and the tensile elongation is 47. %.

Embodiment 3

[0018] Use pure Mg-8Er master alloy and pure Cu, Ag elements to prepare alloy elements according to 90Mg-8Er-1Cu-1Ag (mass ratio). Smelting at 760 degrees, heat preservation for 20 minutes and casting into rods with a diameter of 50mm. Then carry out homogenization treatment at 450°C / 24h. Then, hot extrusion was carried out at 430° C., the extrusion ratio was 12:1, and the extrusion speed was 5 mm / min. The extruded rods are air-cooled. The hot-extruded alloy maintains high tensile mechanical properties in a wide temperature range (room temperature to 350°C). The tensile strength at 350°C is 106MPa, the yield strength is 90MPa, and the tensile elongation is 59.5%.

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Abstract

The invention discloses a high-performance magnesium base alloy material and a method for preparing the high-performance magnesium base alloy material, which are designed for achieving the purpose that a great quantity of small reinforcements which have good thermal stability and are generated when the form of magnesium base alloy is varied and small recrystallization macrostructures which are produced through the small reinforcements are obtained for improving the shear strength of the magnesium base alloy. Mg alloy is taken as a basic material, Er, Cu and Ag which improve the non-crystallizing forming capability of the Mg alloy are selected as alloying elements, and common casting and hot extrusion methods are selected for preparing the alloy material. Because negative formation heat is generated among the elements and the atomic radiuses are more different from each other, a great quantity of interatomic solute clusters are firstly formed during the extrusion process, and furthermore, small intermetallic compound particles with stable mechanical property at high temperature can be separated out on the basis. Moreover, the macrostructure of the alloy is also thinned. The alloy can have very high strength and good plasticity within the range of room temperature to 300 DEG C.

Description

Technical field: [0001] The invention relates to a magnesium alloy-based material and a preparation method thereof, in particular to a high-performance magnesium-based alloy material and a preparation method thereof. It belongs to the field of material science and technology. Background technique: [0002] The development of high-performance wrought rare-earth magnesium alloys has always been a research hotspot of scholars at home and abroad. The current research ideas focus on the Mg-Gd binary system to improve its mechanical properties by adding multiple strengthening alloy elements (Zn, Ca, Zr, Y, Nd, etc.). However, the strength and plasticity of the deformed Mg-Gd-based rare earth magnesium alloys currently developed need to be further improved. Moreover, the general deformed Mg-Gd binary system-based high-performance magnesium alloy currently developed has a rapid decline in strength as the temperature rises. The strength at high temperatures close to 300°C is very l...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22F1/06
Inventor 杜兴蒿东野生栓王大鹏武保林
Owner SHENYANG AEROSPACE UNIVERSITY
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