摘要
In the present research, high chromium cast irons(HCCIs) were prepared using the lost foam casting(LFC) process. To improve the wear resistance of the high chromium cast irons(HCCIs), mechanical vibration was employed during the solidification of the HCCIs. The effects of vibration frequency on the microstructure and performance of the HCCIs under as-cast, as-quenched and as-tempered conditions were investigated. The results indicated that the microstructures of the LFC-produced HCCIs were refined due to the introduction of mechanical vibration, and the hardness was improved compared to that of the alloy without vibration. However, only a slight improvement in hardness was found in spite of the increase of vibration frequency. In contrast, the impact toughness of the as-tempered HCCIs increased with an increase in the vibration frequency. In addition, the wear resistance of the HCCIs was improved as a result of the introduction of vibration and increased with an increase in the vibration frequency.
In the present research, high chromium cast irons（HCCIs） were prepared using the lost foam casting（LFC） process. To improve the wear resistance of the high chromium cast irons（HCCIs）, mechanical vibration was employed during the solidification of the HCCIs. The effects of vibration frequency on the microstructure and performance of the HCCIs under as-cast, as-quenched and as-tempered conditions were investigated. The results indicated that the microstructures of the LFC-produced HCCIs were refined due to the introduction of mechanical vibration, and the hardness was improved compared to that of the alloy without vibration. However, only a slight improvement in hardness was found in spite of the increase of vibration frequency. In contrast, the impact toughness of the as-tempered HCCIs increased with an increase in the vibration frequency. In addition, the wear resistance of the HCCIs was improved as a result of the introduction of vibration and increased with an increase in the vibration frequency.
作者
Wen-qi Zou
Zhi-guo Zhang
Hao Yang
Wei Li
Wen-qi Zou;Zhi-guo Zhang;Hao Yang;Wei Li(Department of Materials Science and Engineering, Jinan University,Guangzhou 510632, China;Guangdong Dongguan Quality Supervision Testing Center (National Mould Products Quality Supervision Inspection Center), Dongguan 523808, China;Shaoguan Research Institute, Jinan University,Shaoguan 512027, China)
基金
supported by the Science and Technology Plan Project of Guangdong province,China(2015B090926012,2014B090901001034,2014YT02C036,2013B090500106,2013CX/G18)
the Scientific Research and Innovation Project of Jinan University(No.21615437)
