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Published in:
2016 | OriginalPaper | Chapter
The Effect of Surface Pulsed Magneto-Oscillation on Solidification of Low Pressure Rotor 30Cr2Ni4MoV Steel
Authors : Xunzhe Zhang, Jing Zhao, Jihao Yu, Honggang Zhong, Qijie Zhai
Published in: TMS 2015 144th Annual Meeting & Exhibition
Publisher: Springer International Publishing
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The influence of surface pulsed magnetic oscillation (SPMO) on the solidification of 30Cr2Ni4MoV steel was tested. The experimental results indicated that the SPMO significantly refined the solidification structure and homogenize composition of this steel. Firstly, the rate of equiaxed grains was increased from 25.3% to 59%. Secondly, the position of CET was changed significantly and the average length of columnar dendrite moved from 21.1mm to 7.9mm. Meanwhile the average secondary dendritic arm spacing (SDAS) decreased from 178.4μm to 144μm. Furthermore, the SPMO also had a positive effect on carbon segregation, ratio of which changed from 0.85~1.2 to 0.95~1.1.