高强韧Al-Si(A357)合金的晶粒细化研究  

Research on Refinement of the High-Strength and Ductility Al-Si Alloy

作　　者：米国发[1] 孔留安[1] 朱兆军[2] 王宏伟[2] 张二林[3] 曾松岩[2] 

机构地区：[1]河南理工大学机械工程学院,河南焦作454000 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [3]中国科学院金属研究所,辽宁沈阳110016

出　　处：《铸造技术》2005年第6期508-510,514,共4页Foundry Technology

摘　　要：对高强韧AlSi(A357)合金晶粒细化技术进行了研究。结果表明采用Ti,B复合细化时,细化效果比单一Ti,B,Zr细化效果更好,随B量增加,同时细化效果明显改善。采用Ti,B,Zr复合细化时,当Ti/B=1,0.2时,Zr促进晶粒细化当Ti/B=5时,Zr却阻碍晶粒细化。Al5Ti1B细化剂对AlSi合金具有良好的细化效果。对于AlSi合金而言,最佳的工艺为720℃加入4%的细化剂,保温5～10min。The grain refinement of Al-Si alloy has been studied in the paper. The results show that the refinement of Ti and B combined refiner is better than that of single Ti, B or Zr refiner. With increasing of B content in the refiner, the refinement results are significantly improved. Using Ti, B and Zr combined refiner Zr makes grain fine with Ti/B=1, 0.2; with Ti/B=5 Zr prevent gain fine. Al-5Ti-1B finer has good refinement result. For Ai-Si alloy a good refinement can be obtained by adding 4% of Al-5Ti-1B master alloy at 720°C and holding time for 5-10 min.

关 键 词：AL-SI合金 细化剂 晶粒细化 

分 类 号：TG27[金属学及工艺—铸造]