Fine grained aluminium alloy and its preparing method
An aluminum alloy and fine-grain technology, which is applied in the field of fine-grained aluminum alloy and its preparation, can solve the problems of low element recovery rate, large variation, and high cost of intermediate alloys, and achieves the advantages of reducing cost, ensuring quality and improving recovery rate. Effect
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[0051] In the 60KA electrolytic cell, add iron-removing silicon-titanium alumina powder (containing a small amount of boron oxide and rare earth oxide). Aluminum alloys containing low titanium, boron, rare earth and silicon are produced directly by electrolysis in cryolite system electrolyte. Adjust the chemical composition in the aluminum mixing furnace. The chemical composition of the electrolytic ZL101 aluminum-silicon alloy is as follows (mass fraction, %): Si7.24, Mg0.36, Fe0.11, Ti0.11, B0.0001, RE0.036. The average grain size of the α primary dendritic aluminum phase is 350 μm (Fig. 1). The average grain size of ZL101 alloy (titanium content is 0.10-0.15%) treated with Al-Ti master alloy under the same process conditions is 700 microns.
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