论文部分内容阅读
磨损是机械零件的三种失效方式之一,耐磨材料的研究在国民经济上具有重要意义。近20年来,耐磨铸铁的研究应用越来越广泛。如用于中小型球磨机衬板的普通白口铸铁,其硬度为350～450HV,且成本很低;用于各种磨煤机、矿石破碎机等设备的高铬白口铸铁,具有60～65HRC的工作硬度,其组织中共晶碳化物(Fe,Cr)_7C_3的硬度值高达1300～1800HV,同时它还具有良好的韧性;此外,还有镍硬白口铸铁、低铬铸铁,它们用于冲击负荷
Wear is one of the three failure modes of mechanical parts. The study of wear-resistant materials is of great significance in the national economy. In the past 20 years, the research and application of wear-resistant cast iron has become more and more widespread. As used for small and medium-sized ball mill liner white iron, the hardness of 350 ~ 450HV, and low cost; for a variety of coal mills, ore crusher and other equipment of high-chromium white cast iron, with 60 ~ 65HRC Of its work hardness, the organization of eutectic carbide (Fe, Cr) _7C_3 hardness value as high as 1300 ~ 1800HV, but it also has good toughness; In addition, there are nickel hard white cast iron, low chromium cast iron, which used for the impact load