本文对具有不同碳含量的欠速淬火钢轨的力学性能、断裂韧性、金相组织及硬度进行了对比试验,结果表明,钢轨经欠速淬火后,强韧性及塑性均有明显提高,且淬火硬度越高,不仅耐磨也抗剥离,结合铺设试验,探讨了欠速淬火提高钢轨强韧性能的原因,及其含碳量、硬度与使用性能的关系。
A comparative investigation was carried out of the routine mechanical properties, fracturetoughness, microstructure and hardness of slack--quenched rails containing different carbon contents. After therails slack--quenched, their strength and toughness, together with ductility, are obviously improved, and thehigher the quench hardening is, the more the resistance to wear and shell will be. Discussion was also made ofthe reason for this improvement and of the effect of carbon content and quench hardening on the properties ofrails in combination with the rail--laying trial.
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