Microstructure evolution and microhardness of TiAl based alloy blade by vacuum suction casting

Vacuum ◽  
2019 ◽  
Vol 163 ◽  
pp. 186-193 ◽  
Author(s):  
Xi-Cong Ye ◽  
Ke-Qiang Xiao ◽  
Ru-Xin Cao ◽  
Haihua Wu ◽  
Guang-wei Zhao ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Vacuum Suction ◽  
Suction Casting

The Study on TiAl Based Alloy Blade Casting Structure by Bottom Pouring Vacuum Suction Casting

2013 ◽  
Vol 442 ◽  
pp. 44-47
Author(s):  
Xi Cong Ye ◽  
Wei Guang Zhao
Keyword(s):  
Grain Size ◽  
Fine Structure ◽  
Grain Growth ◽  
Vacuum Suction ◽  
Suction Casting ◽  
Average Grain Size ◽  
B2 Phase ◽  
Blade Casting ◽  
Forced Cooling ◽  
Undercooling Degree

In this paper, the bottom pouring vacuum suction casting is used, and the TiAl-based alloy blade with good face quality was obtained. Bottom pouring vacuum suction casting obtained Ti-47Al-5Nb-0.5Si alloy fine structure, the average grain size is 20um or less. Metal permanent forced cooling effect increases the undercooling degree, and the formation of Ti5Si3 can hinder the grain growth and the formation of nucleation particles, and Nb elements are conducive to the formation of B2 phase, and these three reasons refined the grain size.

Microstructure evolution and magnetic properties of the Nd9Fe81–xTi4C2Nb4Bx (x=11, 13, 15) bulk magnets prepared by copper mold suction casting

2015 ◽  
Vol 33 (10) ◽  
pp. 1081-1086 ◽  
Author(s):  
Yuyong ZHAN ◽  
Jing PAN ◽  
Xiaoli JIANG ◽  
Xincai LIU ◽  
Youren DONG ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Microstructure Evolution ◽  
Copper Mold ◽  
Suction Casting

Numerical simulation and X-ray direct observation of mould filling during vacuum suction casting

2005 ◽  
Vol 18 (3) ◽  
pp. 144-148 ◽  
Author(s):  
S. Kashiwai ◽  
I. Ohnaka ◽  
A. Kimatsuka ◽  
T. Kaneyoshi ◽  
T. Ohmichi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Direct Observation ◽  
Vacuum Suction ◽  
Suction Casting ◽  
X Ray ◽  
Mould Filling

Research on Microstructure and Properties of Co-Si Alloys by Vacuum Suction Casting

2016 ◽  
Vol 850 ◽  
pp. 202-207
Author(s):  
Zhen Peng ◽  
Peng Hui Wu ◽  
Jing Zhang ◽  
Ning Liu ◽  
Xiao Jing Wang
Keyword(s):  
Rapid Solidification ◽  
Interdendritic Region ◽  
Eutectic Point ◽  
Primary Phase ◽  
Eutectoid Decomposition ◽  
Vacuum Suction ◽  
Suction Casting ◽  
Volume Fractions ◽  
Microstructure And Properties ◽  
Intermediate Phases

Rapid solidification of Co-Si alloys was investigated by using vacuum suction casting in this study. Different microstructures and intermediate phases were obtained. Eutectic εCo phase and eutectoid εCo + αCo2Si structures were obtained in the first eutectic Co76.9Si23.1 alloy. The microstructures of hypereutectic Co70Si30 alloys were composed of primary αCo2Si phase and interdendritic lamellar eutectoid εCo + αCo2Si. While for hypoeutectic Co63Si37 alloy at the second eutectic point, CoSi dendrites were the primary phase, and αCo2Si+CoSi eutectoid structures can be seen at the interdendritic region. Especially, a metastable CoSi2 phase was found in Co63Si37 alloy. This indicates that eutectoid decomposition βCo2Si→ CoSi+αCo2Si is restrained in eutectic Co60.3Si39.7 alloy. For rapid solidified Co55Si45 and Co52Si48 alloys, αCo2Si+CoSi eutectoid structures were not observed, while metastable CoSi2 were obtained. The higher hardness achieved in Co-Si alloys at the second eutectic point, for the reason of the higher volume fractions of compound phases.

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