Effectively refining Al-10Si alloy via Al-Ti-Nb-B refiner with Nb_(2)O_(5)  

作　　者：Longfei Zhu Yu Zhang Qun Luo Liming Peng Qian Li 

机构地区：[1]State Key Laboratory of Advanced Special Steels&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering,Shanghai University,Shanghai,200444,China [2]College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China [3]National Engineering Research Centre of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai,200240,China [4]National Engineering Research Center for Magnesium Alloy,Chongqing University,Chongqing,400044,China College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China [5]National Key Laboratory of Advanced Casting Technologies,Chongqing University,Chongqing,400044,China

出　　处：《Journal of Materials Science & Technology》2024年第9期204-210,共7页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.U2102212)and the Shanghai Rising-Star Program(No.21QA1403200).

摘　　要：Al-Si alloys have excellent corrosion resistance,low thermal expansion coefficient,and high strength-to-weight ratio,which make them widely used in structural components in the automotive and aerospace industries[1,2].However,the coarseα-Al dendrites result in poor mechanical properties[3,4],and the widely used Al-5Ti-B(all compositions are in wt.%unless otherwise specified)refiner fails in as-cast aluminum alloys with high silicon content(≥5 wt.%)due to the Si-poisoning effect[5,6].Fortunately,in order to overcome Si-poisoning,a series of refiners have been developed.Al-B refiner is effective for refining aluminum alloys with high silicon content,but it is easy to be poisoned by Ti/Zr[7,8].Al-Nb-B[9–11]and Al-V-B[12]refiners have a certain ability to overcome Si-poisoning,while the nucleating particles have a large density and are easy to agglomerate and settle,leading to the grain refinement fading phenomenon.Al-Ti-C-B refiner realizes the anti-Si/Zrpoisoning ofα-Al grain refinement based on the evolving effect of a doped TCB complex[13,14].Al-Ti-Nb-B refiner prepared with Nb partially substituted Ti can improve the refinement level of Al-10Si alloy to 109–125μm[15,16].However,the existing preparation method of the refiner uses pure Nb powder as raw material,resulting in high preparation costs,which limits its application in industry to a certain extent.

关 键 词：ALLOY CORROSION REFINEMENT 

分 类 号：TG14[一般工业技术—材料科学与工程]