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首页> 外文期刊>Journal of Materials Engineering and Performance >Kinetics of strain aging in bake hardening ultra low carbon steel-- a comparison with low carbon steel
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Kinetics of strain aging in bake hardening ultra low carbon steel-- a comparison with low carbon steel

机译：烘烤硬化超低碳钢的应变时效动力学-与低碳钢的比较

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摘要

The kinetics of the static strain aging process have been analyzed in a vacuum-degassed ultra low carbon bake hardenable (ULC BH) steel with a total carbon content of 20 wt.ppm through measurement of the strength properties. The influence of prestrain and free interstitial carbon content has been studied. The kinetic results were compared with those of a BH low carbon (LC) steel. In the derivation of the time exponent and the activation energy, only the first stage of aging was considered. It was observed that, at all prestrain levels and matrix solute carbon contents, the initial aging process in the ULC steel obeyed the t{sup}(2/3) kinetic law and the kinetics were not influenced by the changes in dislocation structure due to prestrain and the dissolved carbon content. In comparison, the aging process and the kinetics in the LC steel were found to be significantly influenced by the amount of prestrain. The presence of carbide particles in LC steels can modify the aging kinetics.
机译：静态应变时效过程的动力学已通过测量强度特性，在总碳含量为20 wt.ppm的真空脱气超低碳可烘烤硬化（ULC BH）钢中进行了分析。研究了预应变和自由间隙碳含量的影响。将动力学结果与BH低碳（LC）钢的动力学结果进行了比较。在时间指数和活化能的推导中，仅考虑了老化的第一阶段。观察到，在所有预应变水平和基体固溶碳含量下，超低碳钢的初始时效过程都遵循t {sup}（2/3）动力学定律，并且动力学不受位错结构变化的影响。预应变和溶解碳含量。相比之下，发现LC钢的时效过程和动力学受到预应变量的显着影响。 LC钢中碳化物颗粒的存在会改变时效动力学。

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