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研究了RW60E钢的成分、组织和低温力学性能,对其不同温度下的线膨胀系数进行了测试,建立了线膨胀系数与温度关系的数学模型,并与常规材料进行了比较,最后将-45℃下RW60E钢的线膨胀系数值应用于钻机车大梁的应力分析。通过对RW60E钢的力学性能分析证明其具有良好的低温力学性能,能够满足低温钻机的性能要求;对材料线膨胀系数的分析,表明RW60E钢具有较低的线膨胀系数和高的低温稳定性,证明此材料能够比传统的Q345E钢更好地服役于低温环境。
The composition, microstructure and mechanical properties at low temperature of RW60E steel were studied. The linear expansion coefficients at different temperatures were tested. The mathematical model of the relationship between linear expansion coefficient and temperature was established and compared with conventional materials. Finally, The linear expansion coefficient of RW60E steel is applied to the stress analysis of the girder of the drilling machine. Through analyzing the mechanical properties of RW60E steel, it has good low temperature mechanical properties and can meet the performance requirements of low temperature drilling rigs. The analysis of linear expansion coefficient of RW60E steel shows that RW60E steel has low linear expansion coefficient and high low temperature stability, This material proved to be able to perform better in low temperature environments than the conventional Q345E steel.