12Cr1MoV锅炉吊杆用钢的开发生产实践

Development and Production Practice of 12Cr1MoV Steel for Boiler Hanger

通过低C,较高Cr、Mo、V,较低Si、Al,极低的P、S以及气体含量的成分优化设计,采用50t电炉→LF精炼+VD真空脱气→连铸(电磁搅拌)→轧制工艺流程,严格各工序参数控制,开发生产了12Cr1MoV锅炉吊杆用热轧圆钢。产品质量检验表明,成品圆钢成分波动小、洁净度高、晶粒细小均匀、强韧性匹配较好,B级超声波探伤合格,各项性能指标满足标准及用户使用要求。

By optimizing the composition design of low C, higher Cr, Mo and V, lower Si and Al and extremely low P, S and gas content, adopting the process tlow of 50 t electric furnace → LF refining → VD vacuum degassing→continuous casting （with electromagnetic stirring） →rolling and strict control of process parameters, 12Cr1MoV hot rolled round steel for boiler hanger were developed and produced. The product quality inspection showed that the finished round steel has small fluctuation of composition, high cleanliness, fine and uniform grain size and good match of strength and toughness. The grade B ultrasonic flaw detection is qualified; all performance indexes meet standards and user requirements.