Poly(ether ether ketone) is a semicrystalline organic polymer. It has widely been used as high-performance engineering plastic owing to its high melting point (343 °C), excellent mechanical strength, and outstanding chemical resistance. Therefore, poly(ether ether ketone) and its composites have shown lots of applications in aerospace and medical fields. However, its application is restricted due to poor strength at the mechanically joint components. Thus, this scope leads us to study an alternative method of the joint process that will lead to finding a new joining process for poly(ether ether ketone)-based materials. In this study, a solid-state joining process was conducted to join two poly(ether ether ketone) rods by a friction welding process. Here, we statistically optimized the values of forge load, friction load, and friction welding time as 100 N, 450 N, and 8 s, respectively, which have more influence on tensile stress and hardness of the material after the friction welding process. It has been found that the forge load had the highest influence and the forge time had the least influence on tensile strength. Their optimal values were calculated after considering the trend in hardness values by statistical analysis using Minitab software. However, after the optimal values, the above parameter showed a negative effect on the high tensile stress due to the change in crystallinity of the friction welding processed poly(ether ether ketone) as confirmed by X-ray diffraction and thermal analyses.

聚（醚醚酮）是一种半结晶有机聚合物。由于其高熔点（343°C）、优异的机械强度和出色的耐化学性，它已被广泛用作高性能工程塑料。因此，聚（醚醚酮）及其复合材料在航空航天和医疗领域有着广泛的应用。然而，由于机械连接部件的强度差，其应用受到限制。因此，这个范围引导我们研究连接过程的替代方法，这将导致为聚（醚醚酮）基材料找到一种新的连接过程。在这项研究中，进行了固态连接过程，通过摩擦焊接过程连接两个聚（醚醚酮）棒。在这里，我们统计优化了锻造载荷、摩擦载荷、摩擦焊时间分别为100 N、450 N和8 s，对摩擦焊后材料的拉应力和硬度影响较大。已经发现，锻造载荷对抗拉强度的影响最大，锻造时间的影响最小。在使用 Minitab 软件通过统计分析考虑硬度值的趋势后，计算出它们的最佳值。然而，在最佳值之后，由于 X 射线衍射和热分析证实，由于摩擦焊接加工的聚（醚醚酮）结晶度的变化，上述参数对高拉伸应力有负面影响。已经发现，锻造载荷对抗拉强度的影响最大，锻造时间的影响最小。在使用 Minitab 软件通过统计分析考虑硬度值的趋势后，计算出它们的最佳值。然而，在最佳值之后，由于 X 射线衍射和热分析证实，由于摩擦焊接加工的聚（醚醚酮）结晶度的变化，上述参数对高拉伸应力有负面影响。已经发现，锻造载荷对抗拉强度的影响最大，锻造时间的影响最小。在使用 Minitab 软件通过统计分析考虑硬度值的趋势后，计算出它们的最佳值。然而，在最佳值之后，由于 X 射线衍射和热分析证实，由于摩擦焊接加工的聚（醚醚酮）结晶度的变化，上述参数对高拉伸应力有负面影响。