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引用次数: 0
摘要
33CrMoV12-9 钢种广泛应用于机械行业的齿轮、小齿轮和轴承制造,本研究提出了一种优化 33CrMoV12-9 钢种气体渗氮工艺的新实验方法。在温度为 520 °C 的条件下,使用恒定和可变氮化电位 K N 在 4 至 55 小时之间进行了多次氮化实验。根据实验结果,我们确定了最佳条件,并提出了由三个步骤组成的有序循环。使用 X 射线衍射 (XRD)、光学显微镜 (OM)、维氏显微硬度测试 (HV) 和电子探针显微分析 (EPMA) 进行的多种表征表明,表面硬度为 810 HV0.5,氮扩散深度约为 0.7 毫米,最后,冶金结构中没有复杂的氮化物和碳氮化物网络。验证结果证实了所提方法的有效性,从而为改进机械行业的氮化工艺铺平了道路。这项工作为优化在苛刻环境中使用的材料的热化学处理做出了重大贡献。
Optimization and control of gaseous nitriding of a 33CrMoV12-9 steel
This work propose a new experimental methodology to optimize the gaseous nitriding process of 33CrMoV12-9 steel grade, widely used in the mechanical industry for the fabrication of gears, pinions, and bearings. Several nitriding experiments were conducted at a temperature of 520 °C in the interval between 4 and 55 h using both constant and variable nitriding potential K
N
. The obtained results allowed us to determine the optimal conditions and to propose a sequenced cycle consisting of three steps. Multiple characterizations using X-ray diffraction (XRD), optical microscopy (OM), Vickers microhardness testing (HV), and electron probe microanalysis (EPMA) indicate a surface hardness of 810 HV0.5, nitrogen diffusion depth of approximately 0.7 mm. finally, a metallurgical structure devoid of complex networks of nitrides and carbonitrides. The validation results confirmed the effectiveness of the proposed methodology, thereby paving the way for improving the nitriding process in the mechanical industry. This work represents a significant contribution to the optimization of thermochemical treatments for materials used in demanding environments.
期刊介绍:
Materials Testing is a SCI-listed English language journal dealing with all aspects of material and component testing with a special focus on transfer between laboratory research into industrial application. The journal provides first-hand information on non-destructive, destructive, optical, physical and chemical test procedures. It contains exclusive articles which are peer-reviewed applying respectively high international quality criterions.