Al-Zn-Mg-Cu系合金熔铸过程含Ti化合物聚集机理研究  

Study on the agglomeration mechanisms of Ti-containing compound in Al-Zn-Mg-Cu alloy during the melting and casting process

作　　者：蒋会学 李虎田 王国军 杨荣东 罗德维 宋炜 Jiang Huixue;Li Hutian;Wang Guojun;Yang Rongdong;Luo Dewei;Song Wei(Chinalco Materials Application Research Institute Co.,Ltd.,Beijing 102209,China;Southwest Aluminum Co.,Ltd.,Chongqing 401326,China)

机构地区：[1]中铝材料应用研究院有限公司,北京102209 [2]西南铝业(集团)有限责任公司,重庆401326

出　　处：《轻金属》2023年第10期49-53,共5页Light Metals

摘　　要：本研究针对Al-Zn-Mg-Cu系合金熔铸过程含Ti化合物聚集问题,通过锻件本体探伤缺陷分析、含Ti化合物聚集机理研究,结合PoDFA法离线测渣分析,探明了含Ti化合物聚集产生环节及产生机理。研究表明:含Ti化合物聚集为锻件产生探伤缺陷的主要原因之一,聚集产生的主要环节为在线除气过程,主要有三种聚集产生机制,即含Ti颗粒自发聚集、与氧化膜的伴生及氯化物的促进作用。并在此基础上给出了含Ti化合物聚集的控制措施,实现了该类化合物聚集的有效控制,进而显著提升了某类锻件的探伤合格率。This study was aimed at the agglomeration behaviours of Ti-containing compound in Al-Zn-Mg-Cu alloy during the melting and casting process,the detection and analysis of defects in forgings were carried out,the agglomeration mechanism of Ti-containing compound was studied,combined with the off-line analysis of inclusions by the method of PoDFA,the position where the Ti-containing compound congregated and the agglomeration mechanism were obtained.Study results show that the agglomeration of Ti-containing compound was one of the main reasons that caused the detection defects,the major agglomeration position was the in-line degassing process.There were three kinds of agglomeration mechanism,spontaneous agglomeration of Ti-containing particles,co-exist with oxide film and the facilitation of chloride.The control method of the agglomeration of Ti-containing compound was provided based on this,the phenomenon of agglomeration could be alleviated effectively,which resulted in a remarkable increase of the qualification rate of detection for certain kinds of forgings.

关 键 词：AL-ZN-MG-CU系合金 熔铸 含Ti化合物 聚集机理 

分 类 号：TF125.22[冶金工程—粉末冶金] TG113[冶金工程—冶金物理化学]