Research On Micro-backward-extrusion Process Experiment With Amorphous Alloy

Zr-based bulk metallic glasses hold the best glass-forming ability (GFA), including Zr55Al10Cu30Ni5. With the basic knowledge on chemical property, physical property and mechanical property, superplasticity rheological behavior in supercooled liquid region and crystallization of Zr55Al10Cu30Ni5has been systematically researched by means of mechanical machining,basic extrusion test, backward extrution text X-ray, diffraction (XRD).Amorphous alloys physicochemical and mechanical properties are the basis of the micro-forming study. As the temperature changes, it can accurately respond to transition temperature (Tg) of amorphous alloy glass and Temperature and termination temperature (Tx) of crystallization. Meanwhile high hardness, high strength, mechanical properties and superplasticity are also related to forming means and application of the amorphous alloy.Design, manufacture three series of micro-forming die. Through the design of half-die, compressing block, reversal structure, the right choice of the mold material, heat treatment and assembly programming, a number of key issues on the design and manufacture of the microdie have been solved.This dissertation aims at designing and completing the amorphous mirco- backward- extrution test. Through the overview of basic theory, process description, conclusion of findings,and Origin data analysis, we find the limit of Zr55Al10Cu30Ni5 forming rate and temperature, and form a research method, which begins with overview of theory, and practice according to it, finally comes to a theory.