(1.哈尔滨理工大学 807信箱， 哈尔滨 150080;
2.哈尔滨燃气化工总公司，哈尔滨 150076)
摘 要: 用对比的方法，研究了脉动磁场对Al-Cu合金热裂倾向性的影响。实验结果表明：脉动磁场具有缩小Al-Cu合金有效结晶区间、减小有效结晶区间线收缩之功能，有效地降低了Al-Cu合金热裂倾向性；磁场频率的影响为： f =19.5 Hz 时热裂纹最小，f >37.5 Hz 时影响不大。
关键字: 脉动磁场 Al-Cu合金 热裂
（1.Harbin University of Science and Technology, Harbin 150080
2.Harbin Company of Gas, Harbin 150076）
Abstract:Under laboratory conditions, the effects of pulsating electromagnetic field on the tendency of the hot cracking of Al-Cu alloys were studied by comparative method. It was shown that pulsating electromagnetic field can contract the valid crystallization region and lessen the shrinkage of Al-Cu alloys. The tendency of hot cracking of Al-Cu alloys decreases markedly under pulsating electromagnetic field. When f is equal to 19.5Hz, the effect of pulsating electromagnetic field on the tendency of hot cracking is less than any other frequency conditions and when f is larger than 37.5Hz the pulsating electromagnetic field gives little effectson the hot cracking.
Key words: pulsating electromagnetic field Al-Cu alloy hot crack
