Properties of various CaO-Al2O3-TiO2 refractories and their reaction behaviours in contact with Ti6Al4V melts

被引：13

作者：

Qi, Xindi ^{[1
]}

Fu, Lvping ^{[1
,2
,3
]}

Du, Riqing ^{[1
]}

Gu, Huazhi ^{[1
]}

Chen, Ding ^{[1
]}

Yang, Shuang ^{[1
]}

Huang, Ao ^{[1
]}

Lv, Renxiang ^{[2
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

[2] Jinan Ludong Refractories Co Ltd, Jinan 250109, Peoples R China

[3] 947 Heping Ave, Wuhan 430081, Hubei, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 959卷

基金：

中国国家自然科学基金;

关键词：

CA6; CaTiO3; Titanium alloy; Corrosion resistance; Interfacial reaction; DIRECTIONAL SOLIDIFICATION; MICROSTRUCTURE EVOLUTION; MECHANICAL-PROPERTIES; HYDRATION RESISTANCE; CALCIUM ZIRCONATE; TIO2; ADDITION; TITANIUM; CAO; ALLOYS; INTERFACE;

D O I：

10.1016/j.jallcom.2023.170599

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Vacuum induction melting technology is an important method for producing high-quality titanium alloy. The key challenge lies in the development of refractories with excellent chemical stability for titanium alloy corrosion. In this work, CaO-Al2O3-TiO2 refractories are proposed as the potential materials for Ti6Al4V alloy smelting. Four CaO-Al2O3-TiO2 refractories with different TiO2 contents were prepared and their reaction behaviours in contact with titanium aluminum melts were investigated in detail. When the refractory has a suitable content of CaTiO3 phase, it promotes the diffusion and mass transfer rate of ions and improves the sintering reaction activity, leading to good high temperature mechanical properties and corrosion resistance to titanium aluminum alloy. However, when the TiO2 component is excessive, CA6 has been completely wrapped by CaTiO3, and some CA6 grows abnormally, resulting in a decrease in high temperature me-chanical properties of the refractory. Moreover, during the smelting of Ti6Al4V alloy, Al component reacts with CaTiO3 to produce metallic Ti and calcium aluminate phase with low melting point, resulting in de-gradation of refractory.(c) 2023 Elsevier B.V. All rights reserved.

引用

页数：13

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