leemige
幼苗
共回答了12个问题采纳率:91.7% 举报
Aluminium is small in density with light quality. Pure aluminium possesses high plasticity thus could be fabricated under pressures, yet is low in intensity, which makes it unable to be served as a structure material. It is discovered that mixture with some alloying elements in appropriate amount following with cold/hot machining to be made into alufer(或:aluminium alloy) may improve its density significantly. Thereon the density extreme of it could be raised to 50 to 60 kilograms per square millimeter, equaling to high-intensity aluminum alloy made from low alloy steel.
With superiorities as light quality, high intensity, good electrical/temperature conductivity, easiness to be fabricated/transformed, innocuity besides environment friendliness, etc, and being abundant in resource, applications of aluminium as well as its alloy cover a large range. Therefore, it is, as for research on aluminium alloy at present, a major topic to study aluminium-copper alloy with high intensity plus good tenacity.
Those alloying elements mostly added are copper(Cu), magnesium(Mg), silicon(Si), manganese(Mn) and zinc(Zn). Among alufers, Al-Cu system alloys have high potential of toughness. Aluminium alloy foundries are made with smelting and casting techniques and, considering gas content at low level, solution strengthening for alloy elements can be achieved while mechanical properties of the alloy could be improved by sufficient solution treatment for the foundries. Then intensity and rigidity of the foundries may be further improved with aging strengthening after solution treatment. This study does get aluminium alloy contained with 5% of copper through smelting Al-50%Cu alloy and pure aluminium, taking as aluminium-copper alloy as subjects and, reach to impact regulations of hot-machining time(或:period) on the texture and properties of the alloy through observation for metallographic phase.
Keywords: aluminum-copper alloy, smelting, solution treatment, aging strengthening
供参.
1年前
3