A study on water jet rapid prototyping technology of A356 aluminum alloy
A rapid prototyping technology for metal alloys is introduced.The technology is based on the principle of dynamic directional solidification.The grain refinement and porosity reduction of the alloy microstructure can be achieved by high pressure water jet dynamic and rapid cooling without adding refining agent,metamorphic agent and degassing agent,and the mechanical properties of the alloy can be improved.The condensation time of A356 aluminum alloy prepared by this technology can be shortened to 15 s.The microstructure is uniform,the primary phase(α-Al)and eutectic Si phases are obviously refined,the secondary dendrite arm spacing is significantly reduced.The porosity defects are effectively improved,the porosity can be reduced to 1.1%.The tensile strength of alloy is as high as 285 MPa.
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