Microstructure and interface reaction of titanium alloys casting<br /> into different mould shells<br />
Journal Title: Science Paper Online - Year 2010, Vol 5, Issue 4
Abstract
Special mould shells for precision-casting titanium alloys were prepared with the same binder and different mould shell materials of ZrO2 and Al2O3. Ti-6Al-2Zr-1Mo-1V(BT20), Ti-6Al-4V(TC4) and pure titanium (TA2) were melt and cast into the special mould shells with an LZ-5 centrifugal casting machine. The effects of mould shell materials on the microstructure of the titanium alloys were studied. The results showed that the microstructures of the titanium alloys prepared with different mould shells were different specially. The microstructure of the alloys prepared with the ZrO2 mould shell was finer than that with the Al2O3. The interface reaction of the titanium alloys with the mould shells was investigated by means of line scanning. Compared with the ZrO2 mould shell, the reaction between the Al2O3 mould shell and the titanium alloys was severe, the reaction layers were continuous and the thickness of the reaction layers was about 30 to 40 μm. The reaction layers of the ZrO2 mould shell were thinner and their thickness was about 1/3 as large as that of the Al2O3 mould shell.
Authors and Affiliations
Yuyong Chen, Shulong Xiao, Lijuan Xu
Keywords
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