高频淬火和多元共渗处理对38CrMoAl钢性能的影响

Effect of High Frequency Quenching and Multi-component Co-permeation Treatment on Properties of 38CrMoAl Steel

以38CrMoAl钢为对象,研究了高频淬火、离子多元共渗处理以及二者复合处理工艺参数对材料性能的影响。对试样表面硬度与硬度梯度进行了测试及显微组织观察。结果表明:在频率20kHz、加热功率35kW、加热时间6 s时,38CrMoAl钢试样淬火效果最佳。经过高频淬火与离子多元共渗复合工艺处理试样表面硬度明显优于单一多元共渗处理的试样表面硬度,高频淬火可以显著提高渗氮效果。经过高频淬火预处理的试样,离子多元共渗(525℃保温6h)效果最好。

Taking 38CrMoA1 steel as the object, the influences of the process parameters of the high frequency quenching, the ion multi-component co-permeation treatment as well as two composite treatment on the properties of the material were researched. Hardness on the surface of the sample and the hardness gradient were tested, and the microstructure was observed. The results show that under the frequency of 20 kHz, the heating power of 35 kW and the heating time of 6 s, the quenching effect of 38CrMoA1 samples is the best. Surface hardness of samples treated by composite process （high frequency quenching and the ion multi-component co-permeation） is obviously better than that of the samples treated by single multi-component co-permeation treatment, and high frequency quenching can significantly improve the effect of nitriding. After high frequency quenching sample pretreatment, the effect of ion multi-component co-permeation （525 ℃ for 6 h）is the best.