CV铸铁的强度接近于球墨铸铁,且铸造性能,导热性和振动衰减性能等均优于球墨铸铁。所以,今后CV铸铁将会得到更加广泛的应用,但是,有关CV铸铁拉伸疲劳特性的研究报告却极少见,弄清楚其疲劳特性是非常重要的。这里以球墨铸铁为对比材料,研究CV铸铁在脉动拉伸载荷下的疲劳和疲劳裂纹的扩展,本文对此作一简单报导。 试验材料:CV铸铁基体组织分别为铁素体和 The strength of CV cast iron is close to that of ductile cast iron, and casting performance, thermal conductivity and vibration damping properties are superior to ductile iron. Therefore, the future of CV cast iron will be more widely used, but the research report about tensile fatigue characteristics of CV cast iron is very rare, to find out its fatigue characteristics is very important. Here, ductile iron is used as a contrast material to study the fatigue and fatigue crack propagation of CV cast iron under pulsating tensile load. This article gives a brief report on this. Test materials: CV cast iron matrix organizations were ferrite and