Quasi-crystal reinforced multi-element magnesium alloy and preparation method thereof
A magnesium alloy and quasicrystal technology, applied in the field of quasicrystal reinforced magnesium alloy and its preparation, to achieve the effects of high tensile strength, good comprehensive mechanical properties, and improved comprehensive mechanical properties
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[0015] Example 1
[0016] Alloy composition (mass percentage): 6.69% Zn, 1.46% Y, 0.14% Ho, 0.12% Er, 0.08% Mn, 0.06% Ti, 0.23% Zr, and the rest is magnesium.
[0017] Put pure Mg in a crucible and heat it, and let CO in from 350℃ 2 +SF 6 Mix the shielding gas. After the pure magnesium is completely melted, put the pure Zn and Mg-Y, Mg-Ho, Mg-Er, Mg-Mn, Mg-Ti, Mg-Zr intermediate alloy into the pure magnesium melt according to the design composition ratio. When the alloy melt rises to 760°C, stir for 3 minutes, then refine and stand for 10 minutes, and cast into alloy ingots at 720°C. The alloy ingot was homogenized and annealed at 390°C for 16 hours, and then subjected to hot extrusion. The extrusion temperature was 360°C and the extrusion ratio was 81.
[0018] The extruded alloy was aged at 180°C for 16 hours. The tensile strength of the obtained alloy was 395MPa, the yield strength was 353MPa, and the elongation was 24.2%.
[0019] The extruded alloy was aged at 180°C for 20 hours...
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[0020] Example 2
[0021] Alloy composition (mass percentage): 11.42% Zn, 3.13% Y, 0.32% Ho, 0.26% Er, 0.11% Mn, 0.09% Ti, 0.34% Zr, and the rest is magnesium.
[0022] Put pure Mg in a crucible and heat it, and let CO in from 350℃ 2 +SF 6 Mix the shielding gas. After the pure magnesium is completely melted, put the pure Zn and Mg-Y, Mg-Ho, Mg-Er, Mg-Mn, Mg-Ti, Mg-Zr intermediate alloy into the pure magnesium melt according to the design composition ratio. When the alloy melt rises to 760°C, stir for 3 minutes, then refine and stand for 10 minutes, and cast into alloy ingots at 720°C. The alloy ingot was homogenized and annealed at 390°C for 16 hours, and then subjected to hot extrusion. The extrusion temperature was 360°C and the extrusion ratio was 81.
[0023] The extruded alloy was aged at 175°C for 16 hours. The tensile strength of the obtained alloy was 413MPa, the yield strength was 348MPa, and the elongation was 19.4%.
Example Embodiment
[0024] Example 3
[0025] Alloy composition (mass percentage): 6.82% Zn, 1.38% Y, 0.13% Ho, 0.12% Er, 0.12% Mn, 0.08% Ti, 0.48% Zr, and the rest is magnesium.
[0026] Put pure Mg in a crucible and heat it, and let CO in from 350℃ 2 +SF 6 Mix the shielding gas. After the pure magnesium is completely melted, put the pure Zn and Mg-Y, Mg-Ho, Mg-Er, Mg-Mn, Mg-Ti, Mg-Zr intermediate alloy into the pure magnesium melt according to the design composition ratio. When the alloy melt rises to 760°C, stir for 3 minutes, then refine and stand for 10 minutes, and cast into alloy ingots at 720°C. The alloy ingot was homogenized and annealed at 390°C for 16 hours, and then subjected to hot extrusion. The extrusion temperature was 360°C and the extrusion ratio was 81.
[0027] The extruded alloy was aged at 180°C for 16 hours. The tensile strength of the obtained alloy was 406 MPa, the yield strength was 358 MPa, and the elongation was 23.8%.
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