对于球墨铸铁制成的机械零部件,其低周疲劳性能数据是疲劳设计的重要依据,本文对高强球墨铸铁QT60-10进行了疲劳试验,获得了应力-应变特性曲线,说明该种材料的低周疲劳特性具有拉-压不对称性,非Massing特性和循环硬化等特性。文中还提出了建立应变范围Δε和应力范围Δσ之间的关系,可以很好地描述稳定状态的滞后回路曲线。 For the mechanical parts made of ductile iron, the low-cycle fatigue performance data is an important basis for fatigue design. In this paper, the fatigue test of high-strength ductile iron QT60-10 was carried out and the stress-strain curve was obtained, which shows that the low- Week fatigue characteristics with pull - pressure asymmetry, non-Massing characteristics and cycle hardening and other characteristics. It is also proposed to establish the relationship between the strain range Δε and the stress range Δσ, which can well describe the steady-state hysteresis loop curve.