Abstract: Driven by the "dual-carbon" strategy, the transformation of 82B wire rod production processes from traditional long-process to electric furnace short-process has become inevitable. However, there is still a lack of systematic research on the causes of abnormal martensite structures near the core of wire rods produced by short-process technology. To address this, this study investigated the causes of abnormal martensite structures in 82B wire rods produced by recycled steel materials+electric furnace short-process through metallographic observation, quantitative analysis of macro/micro-segregation, and thermal simulation tests, combined with comparative analysis of 82B wire rod structures produced by traditional long-process technology. The results show that the segregation levels of Mn and Cr elements near the core of short-process 82B wire rods are more severe than those of long-process 82B wire rods. This segregation, along with the higher residual Ni content, shifts the C-curve of 82B steel to the right, reduces the critical cooling rate for martensite formation from 7 °C/s to 3 °C/s. As a result, the martensite content of short-process 82B wire rods under the same cooling rate is higher than that of long-process 82B wire rods. Based on experimental results, process adjustments were applied, including increasing the soaking temperature of billets from (1 120±10) ℃ to (1 160±10) °C and maintaining the heating and soaking holding times at 100-120 min. These adjustments significantly improved macro-segregation and suppressed the formation of abnormal martensite structures.