Method for ultrasonic-assistance laser near-net shape forming of titanium-nickel alloy gradient material
A laser near-net-shaping, ultrasonic-assisted technology, applied in the field of additive manufacturing, can solve the problems of uneven structure, limited manufacturing size, cracking, etc., achieve efficient preparation, avoid collapse problems, and improve quality.
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[0020] Nd:YAG solid-state continuous laser 8, ultrasonic auxiliary device 5, and preheating device 2 are used to perform laser near-net shaping of TC4 and GH4169 powders. The specific shaping steps are as follows:
[0021] A. The experimental substrate 3 is polished with sandpaper, washed with acetone and deionized water, and dried, and screened with a sieve for TC4 and GH4169 powders with a particle size of 45-90 μm, and put the screened powder of 45-90 μm into the electric heating drum Dry in an air drying oven at 100-120° C. for 4-6 hours, and put the two metal powders into the two cylinders 10 of the powder feeder 11 respectively.
[0022] B. Turn on the laser near-net shaping system, specifically including turning on the CNC machine tool, laser, cooling system, and control machine successively; fixing the ultrasonic generator 5 on the machine tool workbench, fixing the preheating device 2 on the ultrasonic generator 5, and then The substrate 3 is fixed on the preheating d...
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