Decreasing Defects of Center Porosity and Improving Secondary Pipe Castings for Superalloy Ingots by Dynamics Methods

Abstract:

The causes and the influence factors of the defects of center porosity and secondary pipe of the casting superalloy ingot are briefly introduced, and the study on the principle and technical characters of grain refinement technology with dynamic methods carried out. The mechanism, working parameter and the test result of the typical application methods including the technologies of vibration of ultrasonic, the vibration of mould, the stir of mould and oscillation in the riser were investigated in detail. By comparing the advantages and disadvantages of different methods and also according to the practical production situation of our company, the most appropriate one for improving the defects of center porosity and secondary pipe is proposed.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 526-530
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.526
• Online since: March 2016
• Authors: Chao Wang, Zhen Rui Li, Yong Ji Niu, Shi Feng Shi, Ning An
• Keywords: Center Porosity, Dendrite, Ingot, Secondary Pipe, Vibration

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