块体非晶合金铸造成形的研究新进展
New Development of Research on Casting of Bulk Amorphous Alloys
(a, b) 50 mm and 20 mm diameter BMG flexsplines cast to near net shape from the alloy LM1b. After casting, the samples have been de-gated and holes machined into the bottom (c, d) inserting the BMG flexspline into a commercial steel outer spline (e) a fully assembled hybrid CSG-20 SWG with a BMG flexspline (f) a still from a video of the BMG flexspline being driven by the wave generator after submersion in liquid nitrogen (g, h) testing a fully assembled SWG with a BMG flexspline at liquid nitrogen temperatures (i) example of different BMG alloys cast into flexsplines. In total, four alloys were fabricated commercially, as shown (j) optimal micrographs from the larger 50 mm diameter flexspline comparing the steel part to the cast BMG part (k) images of 20 mm diameter flexsplines from machined steel, machined BMG and two cast BMG (l) a schematic showing approximate cost associated with machining steel flexsplines and casting > 1.0 × 104 BMG flexsplines. BMGs can be cast down to ~20 mm in diameter before thermoplastic forming techniques must be used to achieve micro-sized flexsplines. Multi-part casting is possible at small flexspline dimensions
