低碳铁素体不锈钢高频直缝电阻焊管退火工艺优化
邵毅,李彦默,刘晨曦(),严泽生,刘永长
Annealing Process Optimization of High Frequency Longitudinal Resistance Welded Low-CarbonFerritic Stainless Steel Pipe
SHAO Yi ,LI Yanmo ,LIU Chenxi (),YAN Zesheng ,LIU Yongchang

图5. 不同退火温度下焊缝区微观组织的OM像

Fig.5. OM images of microstructures in weld zone after annealing at different temperatures for 3 min(a) 650 ℃ (b) 750 ℃ (c) 850 ℃ (d) 950 ℃