Duplex surface treatment of AISI 1045 steel involves nitriding followed by titanium thermo-reactive deposition (TRD) techniques at 900 ℃ for 3 h. The treatment forms a titanium carbonitride coating with a maximum thickness of 8.5 μm. Characterization using a scanning electron microscope equipped with an energy-dispersive X-ray spectrometer (SEM–EDS) and X-ray diffraction (XRD) indicated that the compact and dense coatings mainly consisted of Ti(C_0.51N_0.21) and Fe_0.975Ti_0.025 phases. Furthermore, the microhardness and tribological properties of the coating treated at 900 ℃ for 3 h were investigated using microhardness test and wear test. The average hardness value of the pre-nitride coating is 1136 HV_0.05 and that of the composite treatment coating is 2166 HV_0.05, which are 4.6 and 8.8 times that of the substrate, respectively. Compared with the substrate, the pre-nitriding layer presented a moderate friction coefficient, whereas the samples with pre-nitriding and titanizing duplex-treated layers showed the best wear resistance.

AISI 1045 钢的双相表面处理包括渗氮，然后是钛热反应沉积 (TRD) 技术，在 900 ℃ 下持续 3 小时。该处理形成最大厚度为 8.5 μm 的碳氮化钛涂层。使用配备能量色散 X 射线光谱仪 (SEM-EDS) 和 X 射线衍射 (XRD) 的扫描电子显微镜进行表征表明，致密的涂层主要由 Ti(C _0.51 N _0.21 ) 和 Fe _0.975 Ti组成_0.025相。此外，采用显微硬度试验和磨损试验研究了涂层在 900 ℃ 处理 3 h 的显微硬度和摩擦学性能。预氮化涂层的平均硬度值为 1136 HV _0.05复合处理涂层为2166 HV _0.05，分别是基材的4.6倍和8.8倍。与基体相比，预渗氮层具有中等的摩擦系数，而预渗氮和钛化双相处理层的样品表现出最好的耐磨性。