Method for preparing high strength and ductility magnesium-rare earth alloy through selective laser melting additive manufacturing technology
A technology of selective laser melting and magnesium-rare-earth alloys, which is applied in the direction of additive manufacturing, additive processing, and energy efficiency improvement. It can solve the problems of grain and eutectic phase coarseness, inclusion mechanical properties, composition segregation, etc. Low phase content, good product stability, and improved structure
Active Publication Date: 2020-01-14
SHANGHAI JIAO TONG UNIV
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The invention provides a method for preparing high strength and ductility magnesium-rare earth alloy through a selective laser melting additive manufacturing technology. The method comprises the following steps that A, through a gas atomization method, Mg-RE-(Zn)-Zr alloy spherical powder is prepared; B, selective laser melting molding is carried out on the Mg-RE-(Zn)-Zr alloy spherical powder toobtain the high strength and ductility magnesium-rare earth alloy; and C, the magnesium-rare earth alloy made in the B is subjected to heat treatment: solid solution + aging treatment or aging treatment directly. Through regulating of selective laser melting process parameters (laser power, scanning speed, scanning interval, light spot diameter, layer thickness, interlayer corner, base plate preheating temperature, partition width and lap-joint area width and subsequent heat treatment process parameters (temperature and time), the microstructure and the mechanical property of the alloy are regulated. The selective laser melting technology is used firstly for preparing the high strength and ductility Mg-RE-(Zn)-Zr alloy.
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Property | Measurement | Unit |
Tensile yield strength | 252.0 | mPa |
Tensile strength | 275.0 | mPa |
Tensile yield strength | 260.0 | mPa |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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