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采用功率为 2kW、扫描速度为 10 0mm/min的工艺参数对钻杆接头材料 30CrMnSiA钢进行了表面相变硬化处理 ,研究了相变层的组织和硬度特征。实验结果表明 ,30CrMnSiA钢表面相变硬化层分为完全淬硬层、过渡层和受热影响的基体组织 ,硬化层的显微组织明显细化 ,其表面层的硬度比高频淬火的硬度提高了 30 % ,淬硬层深度达 1 7mm ,比高频淬火深度提高近 1倍。
The phase transformation hardening of 30CrMnSiA steel was carried out with the power of 2kW and the scanning speed of 10 0mm / min. The microstructure and hardness of the phase change layer were studied. The experimental results show that the surface hardened layer of 30CrMnSiA steel is divided into a completely hardened layer, a transition layer and a matrix structure affected by heat. The microstructure of the hardened layer is obviously refined, and the hardness of the surface layer is higher than that of the high- 30%, hardened layer depth of 1 7mm, higher than the frequency of high-frequency quenching nearly 1 times.