块体非晶合金铸造成形的研究新进展

刘日平, 马明臻, 张新宇

New Development of Research on Casting of Bulk Amorphous Alloys

LIU Riping, MA Mingzhen, ZHANG Xinyu

表2 不同铸造成形技术的适用性及优缺点

Table 2 Applicability, advantages and disadvantages of different casting molding technologies

Casting molding Cast amorphous alloy Advantage Disadvantage technology casting Vacuum die casting Thin-walled castings such as Near net shape casting, fast Limited casting thickness phone shells, watch shells, speed, high efficiency (0.5-2.0 mm), low process notebook computer yield, and there are tiny accessories, etc. pores Vacuum suction casting Simple cylinder, disk, ring, Stable filling, controllable Not suitable for casting of or plate-like casting flow state of alloy melt complex shaped castings Water-cooled copper Suitable for casting molding Amorphous alloy melt does not The low overheat of the alloy crucible melting of various shapes and sizes react with the crucible, the alloy melt affects the filling ability copper mold casting castings melt is clean, and it does not and is prone to produce defects affect the amorphous forming of insufficient pouring ability Ceramic or graphite Suitable for casting molding Alloy melt with a large The alloy melt reacts with the crucible melting copper of various shapes and sizes controllable range of overheat, crucible to reduce the amorphous mold casting castings good filling ability, easy to forming ability, and it is only obtain complete castings suitable for alloy systems with strong forming ability Phase transformation Suitable for casting molding Controllable cooling rate Additional cooling medium is refrigeration casting of various shapes and sizes required and is difficult to castings operate