CAJ | 학술논문

通过在铝硅合金中添加稀土元素,促进固液两相区的固相-α相的球化生长,以满足半固态成型技术对半固态坯料的要求.稀土元索在α相界面前沿的偏聚改变了α相生长的热力学条件,使α相的生长趋于均匀化,提高了α相球化效果,同时阻碍了α相的生长,细化了晶粒.在ZL101加人稀土元素后,使合金中的α相得到了球化,球化效果与稀土的加入量有关,当稀土加入量为0.50%时为最佳,稀土元素还能细化α相的晶粒.
통과재려규합금중첨가희토원소,촉진고액량상구적고상-α상적구화생장,이만족반고태성형기술대반고태배료적요구.희토원색재α상계면전연적편취개변료α상생장적열역학조건,사α상적생장추우균균화,제고료α상구화효과,동시조애료α상적생장,세화료정립.재ZL101가인희토원소후,사합금중적α상득도료구화,구화효과여희토적가입량유관,당희토가입량위0.50%시위최가,희토원소환능세화α상적정립.
The elements of rare earth are added to Al-Si alloys to promote the growth of α-phase ball in solid-liquid two-phase, to meet the requirements of semi-solid billet in semi-solid forming technology. The thermodynamic conditions of α-phase growth are varied by the asymmetry distribution of RE in the forefront of the α-phase interface, the α-phase growth is more uniform and improve the effect of α-phase ball, the growth of α-phase is hindered and fined crystal tablets are formed. When the RE is added to AlSi_7, the α-alloy get the ball, the effects of the ball is related to the addition of the rare earth, in this experiment, the optimal addition of rare earth is 0.50%, RE can make the grain refinement of α-phase.blets a