Effect of vibration frequency on microstructure and performance of high chromium cast iron prepared by lost foam casting

• Published in: China foundry Vol. 13; no. 4; pp. 248 - 255
• Main Authors: Zou, Wen-qi, Zhang, Zhi-guo, Yang, Hao, Li, Wei
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.07.2016; Foundry Journal Agency; Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China
• Subjects: Alloys; Cast iron; Chromium (Metal); Engineering; Hardness (Materials); high chromium cast iron; vibration frequency; lost foam casting; microstructure; wear resistance; Machines; Manufacturing; Materials Engineering; Mechanical properties; Metallic Materials; Processes; Research Article; Specialty metals industry; microstructure; high chromium cast iron; lost foam casting; vibration frequency; TG143.9; wear resistance
• ISSN: 1672-6421; 2365-9459; 1672-6421
• DOI: 10.1007/s41230-016-6037-3

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.