论文部分内容阅读
以纯铁为对象,通过金相和X射线衍射分析对气体渗氮后的组织和磁性能进行研究。结果表明,决定纯铁渗氮后组织形态和分布的最关键参数是温度和保温时间,形成的致密连续γ’相和ε相混合层可显著提高表面硬度,达到900 HV0.01以上。渗氮后,纯铁的磁性能会有不同程度的下降,其下降程度与渗氮组织形态和分布相关。针对飞控伺服作动器中电磁纯铁制件的要求,通过调整渗氮工艺参数,可以满足其磁性能和硬度的要求。
Pure iron was taken as the object to study the microstructure and magnetic properties of the gas after nitriding by metallographic and X-ray diffraction analysis. The results show that the most important parameters that determine the morphology and distribution of nitriding after pure iron are the temperature and the holding time, and the dense continuous γ ’phase and ε phase mixed layer can significantly increase the surface hardness to 900 HV0.01 or above. After nitriding, the magnetic properties of pure iron will have different degrees of decline, the extent of its decline and nitriding tissue morphology and distribution. According to the requirement of electromagnetic pure iron parts in the flight control servo actuator, the requirements of magnetic properties and hardness can be satisfied by adjusting the nitriding process parameters.