摘要
Zr是高强铝合金中普遍添加的合金元素,当用Al-Ti-B细化含Zr铝合金时,却会产生细化剂的中毒现象。Zr中毒随着时间的延长而加重,并且该过程是不可逆的。深入研究Zr中毒机制有重要应用价值。目前提出的Zr中毒机制有以下四种:一是Zr与TiB_2反应生成ZrB_2或(Ti_(1-x)Zr_x)B_2;二是Zr替换了TiB_2表面TiAl_3层中的Ti;三是Zr与Ti反应生成(Ti_(1-x)Zr_x)Al_3;四是Zr与杂质元素Fe反应生成Al_8Fe_4Zr。对Zr中毒机制的研究进展作了详细介绍。
Zr is an alloying element commonly added in high or ultra-high strength aluminum alloys. However, Zr poisoning takes place when Al-Ti-B refiner is added into the Zr-containing aluminum alloys. The poisoning is irreversible and aggravated with the prolongation of time. It will play a significant role in application to further study the Zr poisoning mechanisms. The following four mechanisms are currently proposed： the first is the generation of ZrB2 or （Ti1-xZrx）B2 by reaction of Zr and TiB2; the second is the replacement of Ti by Zr in the TiAl3 layer on the TiB2 surface; the third is the generation of （Ti〈l-x〉 Zrx ）Al3 by reaction of Zr and TiB2 and the fourth is that the generation of A18Fe4Zr by reaction of Zr and impurity element Fe. We will also make a detailed introduction to the research progress of Zr poisoning mechanisms.
出处
《轻合金加工技术》
CAS
北大核心
2017年第8期20-25,69,共7页
Light Alloy Fabrication Technology
基金
国家自然科学基金重大科研仪器研制项目(编号:51627802)
