(華南理工大學 機電系， 廣州 510640)
摘 要: 為尋求一種低熱裂傾向的高強韌鑄造鋁合金材料，研究了Cu， Zr和V 3種元素對Al-Cu合金熱裂傾向的影響。結(jié)果表明，V明顯降低材料的熱裂傾向; Zr含量低時輕微增大合金的熱裂傾向，含量高時強烈增大熱裂傾向；在4.5%～5.5%范圍內(nèi)Cu增大熱裂傾向。Zr和V對合金熱裂傾向的不同影響在于V主要存在于晶內(nèi)， 而Zr則部分存在于晶界。
關(guān)鍵字: 熱裂； Al-Cu合金； Zr； V
hot tearing trends of Al-Cu alloy
（Department of Mechatronic Engineering， South China University of
Technology，Guangzhou 510640， P.R.China）
Abstract:In order to search a high strength， high toughness alloy with low hot tearing trend， effects of alloying elements copper， zirconium and vanadium on hot tearing trends of Al-Cu alloy were studied. Results show that vanadium can reduce the hot tearing trend evidently; zirconium increases hot tearing trend slightly in low content and strongly in high content; copper increases hot tearing trend with a medium degree in the range of 4.5%～5.5%. Different effects of zirconium on hot tearing trends lie on that vanadium locates in the inner of crystal cell but part of zirconium locates on the interface of the crystal cell.
Key words: hot tearing; Al-Cu alloy; zirconium; vanadium
