<p>This work presented flux-cored arc welding (FCAW) with immediate post-heating (PH) for Fe-Cr-C hardfacing on structural steel. The experiment was designed by comparing the as-weld and post-heating at 400&#xa0;°C and 600&#xa0;°C for 15&#xa0;min using string (S-FCAW) and&#xa0;weaving (W-FCAW)&#xa0;welding techniques. The integrity of hardfacing welds was inspected by visual and penetrant testing. The macro-microstructure was analyzed by an optical microscope, SEM-EDS, and XRD, while the wear resistance was evaluated based on the testing results of hardness and impact toughness. The results revealed that the W-FCAW could increase the integrity and dilution of hardfacing welds compared to the S-FCAW. The martensitic fraction in the martensitic-austenitic matrix tended to increase because the PH temperature was in the range of martensitic transformation. The W-FCAW with PH could increase chromium-carbon diffusion, resulting in dense (FeCr)₇C₃ eutectic carbide, inhibiting the crack propagation at the weld interlayer. The FCAW with PH could improve the characteristic properties of Fe-Cr-C hardfacing welds, such as microstructure, hardness, and impact, resulting in higher wear resistance than conventional FCAW. These findings demonstrated that combining FCAW with immediate post-heating effectively improved the overall performance of Fe-Cr-C hardfacing welds for wear-resistance applications.</p> Graphical Abstract <p></p>