Effect Of Carbon Content On The Microstructure And Properties Of Tial Alloy

In the paper, water cooled copper crucible induction melting furnace and centrifugal as-cast mechanism had been adopted to prepare of Ti Al alloy ingot casting and the corresponding component rod sample and Ladder sample. Then cut the different parts of the alloy ingot for wire cutting. Finally,the morphology was observed after polishing corrosion. Test analysis of alloy ingot casting and casting sample had been tested with the aid of XRD and SEM test method. Besides,Hardness and tensile had been tested. the carbon content of Ti Al alloy microstructure and performance had been studied by observing the analysis of different carbon content Ti Al alloy ingot casting.Through the analysis of macro and microstructure organization,Ti Al alloy ingot casting organization for bulky columnar crystal had been found without adding carbon. when added less carbon element(0.3at.%),Alloy ingot casting and casting sample macro morphology, microstructure refining, and mechanical performance is improved. But there were not obvious precipitated phase. At this point, alloy ingot casting components was relatively uniform which had good performance. When carbon content was added too much, alloy performance had deterioration because of the increased size of precipitated phase and the size was larger.Under the condition of different centrifugal rotational of Ti Al alloy ladder sample thickness(1 mm、2 mm and 4 mm) for casting,something had been found, when the centrifugal rotational speed was low,the solidification process was relatively slow,and grain had grew up in time,so the grain size was larger. Centrifugal rotational speed was too high which made the alloy melt blending more impurities, and made the performance worse. When the rate was slower, solidification time was longer than the others,and grain size was bulky. When the cooling speed was faster which would result in stress concentration in the alloy, etc. which would reduce the alloy’s mechanical properties.Different mechanical properties would appear when there was different solidification path of Ti Al alloy structure. Carbon content added could promote the α transformation of Ti Al alloy which Made alloy structure by the package form a layer of flake. Organization homogeneous alloy casting was obtained.Cooling rate of Ti Al alloy structure also had an important influence.