Abstract: The paper induces technical requirements, process control key points and quality of actual product of single weight 50 t grade 174 mm 12Cr2MolR ( H ) steel plate is produced at Wugang. By C/Al combined deoxidation in the smelting process, ingot annealing at 900 ~ 940℃ for 28 ~ 32 h, rolling pass reduction 20 ~ 30 mm and using normalizing + accelerating cooling + tempering process, the plate structure is uniform, and the mechanical property and step-cooling embrittlement performance of steel plate reach technical requirements. Internal quality of steel plate is excellent. NDT meets NB/T 47013. 3-2015 and revised list No. 1 T1.

Key words: 12Cr2MolR(H) Steel Plate, Forged Ingot, Heat-Treatment, Mechanical Property, NDT

摘要： 介绍了舞钢生产的单重50 t级别的174 mm 12Cr2Mo1R(H)钢板的技术要求、工序工艺控制点及实物质量。通过冶炼时采用C/Al结合脱氧方式,铸锭进行900～940℃保温28～32 h退火处理,轧制时保证道次压下量20～30 mm,并采用正火+加速冷却+回火工艺,钢板组织均匀,各项力学性能及步冷脆化性能均能满足技术要求。钢板内部质量良好,探伤满足NB/T47013.3-2015及第1号修改单T1级。

关键词: 12Cr2Mo1Ｒ(H) 钢板, 锻造锭, 热处理, 力学性能, 探伤