【摘要】 在自制的转盘式冲蚀磨损试验台上以灰口铸铁(HT200)为对比材料,对球墨铸铁(QT500)的冲蚀磨损性能进行了试验研究,结果显示QT500的冲蚀磨损规律与HT200基本相似,而耐冲蚀磨损性能比HT200稍强。在电子显微镜(SEM)下对QT500和HT200冲蚀磨损表面形貌进行观察,分析表明:QT500的冲蚀磨损机制是硬质砂粒对材料表面的微切削作用,而HT200的冲蚀磨损机制是因赫兹裂纹导致的脆性脱落。更多还原

【Abstract】 The erosion wear property of QT500,comparing with HT200,was studied on the self-made rotating-disc erosion wear tester.Results show that the erosion wear rule of QT500 and HT200 are similar,the QT500’s resistance of erosion wear is better than HT200.The erosion wear surfaces of QT500 and HT200 were observed on the scanning electron microscope(SEM),it is showed that the erosion wear mechanism of QT500 is the hard sand’s micro-cutting effect on the material’s surface,and the mechanism of HT200 is the brittleness falling due to the Hertizan cracking.更多还原