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首页> 外文期刊>Materials Characterization >Improved the microstructures and properties of M3:2 high-speed steel by spray forming and niobium alloying
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Improved the microstructures and properties of M3:2 high-speed steel by spray forming and niobium alloying

机译：通过喷射成形和铌合金化改善M3：2高速钢的组织和性能

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摘要

The microstructures and properties of spray formed (SF) high-speed steels (HSSs) with or without niobium (Nb) addition were studied. Particular emphasis was placed on the effect of Nb on the solidification microstructures, decomposition of M2C carbides, thermal stability and mechanical properties. The results show that spray forming can refine the cell size of eutectic carbides due to the rapid cooling effect during atomization. With Nb addition, further refinement of the eutectic carbides and primary austenite grains are obtained. Moreover, the Nb addition can accelerate the decomposition of M2C carbides and increase the thermal stability of high-speed steel, and also can improve the hardness and bending strength with slightly decrease the impact toughness. The high-speed steel made by spray forming and Nb alloying can give a better tool performance compared with powder metallurgy M3:2 and commercial AISI M2 high-speed steels. (C) 2016 Elsevier Inc. All rights reserved.
机译：研究了添加或不添加铌（Nb）的喷射成形（SF）高速钢（HSSs）的组织和性能。 Nb对凝固组织，M2C碳化物的分解，热稳定性和机械性能的影响尤为突出。结果表明，由于雾化过程中的快速冷却作用，喷射成形可以细化共晶碳化物的孔尺寸。通过添加Nb，可进一步细化共晶碳化物和一次奥氏体晶粒。此外，添加Nb可以加速M2C碳化物的分解并增加高速钢的热稳定性，并且可以提高硬度和弯曲强度，同时略微降低冲击韧性。与粉末冶金M3：2和商用AISI M2高速钢相比，通过喷射成形和Nb合金化制成的高速钢可提供更好的工具性能。 （C）2016 Elsevier Inc.保留所有权利。

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