Startseite Complex-shaped high speed steel with high mechanical performance fabricated by gelcasting sintering
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Complex-shaped high speed steel with high mechanical performance fabricated by gelcasting sintering

  • Haixia Sun , Fang Yang , Zhimeng Guo , Xinyue Zhang und Qian Qin
Veröffentlicht/Copyright: 23. Oktober 2019
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Abstract

Hot isostatic pressing is the most common method to prepare powder metallurgy high speed steel. However, due to the limitation of the steel capsule, it is still a challenge to directly produce complex-shaped high speed steel. Therefore, a gelcasting sintering process is proposed in this study. Complex-shaped high speed steel parts were prepared. First, fine powders (10 μm) were employed to prepare a gelcasting slurry. Then, the slurry was poured into a silicone mould followed by debonding and pressureless sintering. Nearly full densification was achieved in the gelcasting sintered samples. Homogeneous microstructure was observed with fine carbides (1 – 2 μm) evenly distributed in the matrix. Compared to traditional samples prepared by hot isostatic pressing, the bend strength increased from 2 800 MPa to 3 800 MPa. Additionally, the oxygen content of the sintered samples was lower than 100 ppm.


Correspondence address, (1) Lecturer Fang Yang, Department: Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, P. R. China, Tel.: +86 13811910626, Fax: +86 1062334341, E-mail: , Web: http://adma.ustb.edu.cn/xygk/szdw/fmyjclyjs/jszlyjy_fm/5882045.html
∗∗ (2) Professor Zhimeng Guo, Department: Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, P. R. China, Tel.: +86 13601188328, Fax: +86 1062334376, E-mail: , Web: http://adma.ustb.edu.cn/xygk/szdw/fmyjclyjs/jsyjy_fm/5881596.html

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Received: 2019-01-31
Accepted: 2019-06-05
Published Online: 2019-10-23
Published in Print: 2019-11-12

© 2019, Carl Hanser Verlag, München

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