采用液相线铸造（在液相线温度铸造）和常规铸造的铝合金２６１８和７０７５，在２００ｋＮ材料试验机上采用具有不同模孔（直径１０，２０，３０ｍｍ）的一系列模具进行半固态模锻，以坯料充填高度作为衡量成形性能指标，考察不同变形温度（４９０～６００℃），不同锻压速度（ｖ＝０．１５～０．６ｍｍ／ｓ）和不同锻压力（ｐ＝５８～９７．２ｋＮ）对其半固态成形性的影响，结果表明，液相线铸造铝合金半固态成形性优于传统的固态成形，在液固相温度区间，随着温度的升高，成形性提高，并且在５８０～６００℃成形性均最好· Semi-solid forging was performed on a 200 kN material testing machine using a series of dies with different die holes (10, 20, 30 mm diameter) using liquidus casting (casting at liquidus temperature) and conventionally cast aluminum alloys 2618 and 7075 , The billet filling height was taken as the measure of forming performance. The effects of different deformation temperature (490-600 ℃), different forging speed (v = 0.15-0.6mm / s) and different forging pressure (p = 58-97.2kN ) On its semi-solid formability, the results show that liquidus cast aluminum alloy semi-solid formability than the traditional solid state forming, in the liquid-solid temperature range, with the increase of temperature, formability increased, and in the 580 ~ 600 ℃ formability is the best ·