Effect Of Rolling Technology On The Microstructure And Properties Properties Of Al-5Fe-Based Alloy

Iron-rich phase in Al-Fe alloy has a shape of thick fragility needle-like or needle-plate, which will cause the reduction of the alloy mechanical property. This paper has studied the technique to improve the phase shape for increasing the mechanical property of Al-Fe alloy. The study work has been center on the deformation performance of Al-5Fe alloy billet prepared by electromagnetic stirring and the change rule of the microstructure and property in the deformation process .a kind of deformation Al-Fe based alloy has been designed,the effect of the rolling technology on deformation performance of the electromagnetic stirring and squeezing billets has been studied individually,at the same time ,the microstructure and mechanical property has been also studied.The research result indicates the Al-5Fe alloy has well high temperature deformation property , iron-rich phase in Al-Fe alloy was breaked gradually in the deformation process of Al-Fe alloy,its mechanic property has been increased obviously, the tensile strength and extensibility in the room-temperature are 146.7 MPa and 28.7% which increase 52.5% and 277% than electromagnetic stirring Al-Fe alloy.Against the desighed Al-Fe-based alloy in this paper ,the crack on the brim of the plate from electromagnetic stirring billet is at least ,the refine result of the iron-rich phase is also at the best ,its average dimension is 0.01mm,and has the most homogeneous distribution, the tensile strength and extensibility in the room-temperature are 314.5 MPa and 7.2%.The density of the electromagnetic stirring billet has been increased obviously after solid-squeezing ,its population deformation performance is better than the electromagnetic stirring billet.the brim of the plate from scheme-3 has not crack approximately,but, for the result of the Iron-rich phase has not reach the optimal result, the tensile strength in the room-temperature has been increased not obviously compared to the plate from electromagnetic stirring billet,only 3.1%.on the contrary, the refine result of the Iron-rich phase of the plate from the scheme-5 reach the optimal result, the tensile strength in the room-temperature arrive at 354.6MPa which was increased about 12.5% than the plate from electromagnetic stirring billet.but the brim of the plate from solid-squeezing billet has microcrack.After the electromagnetic stirring and solid-squeezing process , the degree of hardness of the deformation has a big descending tendency between 25℃～200℃, but the descending tendency is gently when the plate from 200℃to 300℃.