THE INFLUENCE OF ADDITION OF HIGH SPEED STEEL POWDER ON THE PROPERTIES AND MICROSTRUCTURE OF THE SINTERED STEELS
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摘要: 研究了添加高速钢粉对烧结钢组织与性能的影响。实验结果表明:含20%高速钢的烧结钢综合力学性能最好;添加高速钢粉能导致烧结钢密度减小和冲击韧性降低,当高速钢含量增加时,硬度随之增加;烧结钢中残余奥氏体和马氏体的含量与高速钢的含量呈线性关系。烧结钢中的马氏体显微硬度很高,它主要在原高速钢粒子和原铁粒子的连接区域形成。Abstract: The influence of addition of high speed steel powder on the properties and microstructure of sintered steels has been studied. The aim of this research is to find out proper content of high speed steel powdes which will lead to an achievement of the optimum mechanical properties of the sintered samples. The results show that the optimum mechanical properties have been obtained with about 20% high speed steel powder addition. The addition of high speed steel powder will result in a decrease in both density and impact energy of the sintered steels. The hardness of the sintered steel increasses as content of high speed steel increases. The amount of retained austenit and the amount of martensite have a linear relationship with the content of high speed steel in the sintered steels. The martensite which is high in microhardness is mainly formed in the interconected areas between original high speed steel particles and original iron particles in the sintered steels.
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Keywords:
- high speed steel powder sintered steel /
- microstructure /
- properties
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