Semi-solid casting of high speed steel ingots using inclined slope pre-crystallization method |
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Authors: | Youfeng He Shuming Xing Shuisheng Xie Guojie Huang Lei Cheng Milan Zhang |
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Affiliation: | 1.State Key Laboratory for Fabrication and Process of Nonferrous Metals,General Research Institute for Nonferrous Metals,Beijing,China;2.School of Electromechanical Engineering,Beijing Jiaotong University,Beijing,China |
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Abstract: | Semi-solid casting of M2 high speed steel ingots was investigated by inclined slope pre-crystallization method. Effects of
casting temperature and slope length on the microstructure of M2 HSS ingots were investigated. M2 cast ingots of non-dendritic
primary austenite and fine eutectic ledeburite network carbide structure were obtained, with the casting temperature, slope
length and angle of 1480 °C, 500 mm and 60° respectively. Meanwhile, the microstructure of cast samples was quantitatively
assessed by Image tool software. Results show that optimum mean equivalent diameter of primary austenite crystal grain is
50.8 μm, shape factor is 0.83, and mean thickness of network carbide is 5.21 μm. |
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