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首页> 外文会议>International Conference on Proceeding Manufacturing of Advanced Materials >Mechanical Properties of Composite Materials Consisting of M3/2 High Speed Steel Reinforced with Niobium Carbides
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Mechanical Properties of Composite Materials Consisting of M3/2 High Speed Steel Reinforced with Niobium Carbides

机译：复合材料的机械性能，由铌碳化物加固M3 / 2高速钢

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摘要

Fully dense composite materials of M3/2 high speed steel reinforced with 5, 10 and 15vol. % of high purity niobium carbide were developed using powder metallurgy processing. This work describes and discusses the mechanical behavior of the various composite systems. Mechanical properties were characterized by Rockwell hardness, compression and three point bending tests. It was found that the addition of ceramic particles causes a very small increase in the hardness and 0.2% yield strength, but a decrease in the transverse rupture strength is observed. In order to eliminate the influence of martensite on the mechanical properties, measurements were also conducted after tempering. After this treatment, the reinforced materials showed a moderate yield stress increase at room temperature respect to the unreinforced M3/2. However, the bend strength values were not affected significantly by this treatment. At high temperatures, the addition of reinforcement particles causes a slight increase in the strength. Strain rate-change tests in compression were performed at strain rates ranging from 3 ×10~(-6) to 2 × 10~(-3) s~(-1) in the temperature range from 650 to 750°C. The deformation behaviour was characterized by a stress exponent ranging from 5 to 7 and an activation energy for plastic deformation similar to that found in high alloyed ferritic steels.
机译：用5,10和15Vol加固的M3 / 2高速钢的全致密复合材料。使用粉末冶金加工开发出高纯度碳化铌的百分比。该工作描述并讨论了各种复合系统的机械特性。通过罗克韦尔硬度，压缩和三点弯曲试验表征机械性能。发现添加陶瓷颗粒的加入导致硬度和0.2％屈服强度的增加，但观察到横断强度的降低。为了消除马氏体对机械性能的影响，回火后也进行测量。在该处理之后，增强材料在室温方面显示了适度的屈服应力，相对于未原始的M3 / 2。然而，这种治疗不受显着影响的弯曲强度值。在高温下，加入增强颗粒导致强度略有增加。压缩中的应变率变化试验以3×10〜（-6）至2×10〜（-3）S〜（-1）在650至750℃的温度范围内进行。变形行为的特征在于，由5至7的应力指数和用于塑性变形的激活能量，其类似于在高合金铁素体钢中发现的塑性变形。

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