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首页> 外文期刊>Journal of Materials Engineering and Performance >Analyzing the Effect of CeB6 on Microstructure and Mechanical Properties of High-Speed Steel Consolidated by Powder Metallurgy
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Analyzing the Effect of CeB6 on Microstructure and Mechanical Properties of High-Speed Steel Consolidated by Powder Metallurgy

机译：CEB6对粉末冶金固结高速钢组织和力学性能的影响分析

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摘要

By adding various amounts of CeB6, high-speed steel (M3:2) was consolidated by powder metallurgy in the form of sintering. The addition of CeB6 improved the density of the sintered steel and the formation of M6C phase in microstructure. It is speculated that CeB6 was decomposed into boron and cerium. Boron atoms were enriched in M6C carbide phases, but cerium atoms were mainly clustered on grain boundary while they were converted to oxides, whereby the mechanical properties were improved. For example, upon the sintering at 1210 degrees C, relative density98.5% and average grain size18m were obtained with CeB6 content at 0.3wt.%. Excellent mechanical properties, e.g., the Rockwell hardness52 HRC, flexural strength3.05 GPa, and fracture toughness40.92MPam(1/2), were achieved in the sample containing 0.3wt.% CeB6, which implies accordingly remarkable increases by 23.5, 38.1, and 23.7%, of the properties compared with those in the sample free of CeB6.
机译：通过加入各种量的CEB6，通过烧结形式通过粉末冶金固结高速钢（M3：2）。 CEB6的添加改善了烧结钢的密度和微观结构中的M6℃相的形成。 推测CEB6分解成硼和铈。 富含硼原子富含M6C碳化物相，但铈原子主要在晶界上聚集，同时将它们转化为氧化物，从而改善了机械性能。 例如，在1210℃的烧结时，在0.3wt的CeB6含量下获得相对密度为98.5％和平均晶粒尺寸18m。％。 在含有0.3wt％的样品中，实现优异的机械性能，例如罗克韦尔硬度52HRC，弯曲强度3.05GPa和断裂韧性40.92MPAM（1/2），这意味着相应地增加23.5,38.1， 和23.7％的性质与其他无需CEB6的物业相比。

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