(1.哈爾濱理工大學 807信箱， 哈爾濱 150080;
2.哈爾濱燃氣化工總公司，哈爾濱 150076)
摘 要: 用對比的方法，研究了脈動磁場對Al-Cu合金熱裂傾向性的影響。實驗結果表明：脈動磁場具有縮小Al-Cu合金有效結晶區(qū)間、減小有效結晶區(qū)間線收縮之功能，有效地降低了Al-Cu合金熱裂傾向性；磁場頻率的影響為： f =19.5 Hz 時熱裂紋最小，f >37.5 Hz 時影響不大。
關鍵字: 脈動磁場 Al-Cu合金 熱裂
（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
