利用四柱液压机对Mg-4Sn-2.5Pb合金进行了锻造试验,锻造温度为250~400℃,锻造速率为4 mm/s,变形量为50%。结果表明,随着变形温度的升高,在合金的晶界处出现了再结晶晶粒,晶粒也被明显细化。合金的抗拉强度先随温度的升高逐渐升高至最高点,之后随着温度的升高有缓慢下降的趋势。材料的伸长率较铸态有所提高,并随温度的升高逐渐升高,但随温度的进一步升高,伸长率略有降低。锻后材料的塑性明显提高。 The forging test of Mg-4Sn-2.5Pb alloy was carried out by a four-column hydraulic press. The forging temperature was 250-400 ℃, the forging rate was 4 mm / s and the deformation was 50%. The results show that with the increase of the deformation temperature, recrystallized grains appear at the grain boundaries of the alloy and the grains are also obviously refined. The tensile strength of the alloy first increases gradually with the increase of temperature to the highest point, then decreases slowly with the increase of temperature. The elongation of the material is higher than the as-cast, and with the increase of temperature gradually increased, but with the further increase of temperature, elongation decreased slightly. Forging plastic material significantly improved.