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以6063铝合金为例,通过“近液相线半连续铸造方法”(LSC)制造近球状、非枝晶且晶粒细小的显微组织的半固态坯料,对半固态铝合金料圆柱坯从边缘到心部进行了显微组织观察。对坯料进行二次重熔后进行挤压铸造,并从铸造件上取样进行力学和疲劳性能测试,同时与6063铝合金锻造试样的力学和疲劳性能进行了对比。在试验结果的基础上,提出了将LSC和半固态挤压铸造相结合制造半固态铝合金车轮的方法,对半固态铝合金车轮的制造有一定的指导作用。
Taking 6063 aluminum alloy as an example, semi-solid billet with nearly spherical, non-dendritic and fine grain microstructure was fabricated by Semi-continuous casting near liquidus method (LSC) Billet from the edge to the heart of the microstructure was observed. After remelting the billet, the billet was squeezed and cast, and the mechanical and fatigue properties were tested on the castings. The mechanical and fatigue properties of the forged 6063 aluminum alloy were also compared. Based on the experimental results, a method of manufacturing semi-solid aluminum alloy wheels by combining LSC and semi-solid extrusion casting is proposed, which can guide the manufacture of semi-solid aluminum alloy wheels.