CAJ | 학술논문

试验用12Cr2Mo(/％:0.09C,0.30Si,0.34Mn,0.007P,0.006S,2.10Cr,0.93Mo,0.014Al)406 mm×40.5 mm钢管的生产流程为120 t BOF-LF-RH-410 mm ×530 mm连铸-锻制Φ390 mm管坯-460 mm ASSEL机组轧制成管.采用JMatPro软件计算实验用钢平衡相转变图,得出12Cr2Mo钢相变点Ac3为862℃,Ac1为781℃,并对910℃正火,700℃回火处理的试验钢进行组织和力学性能检验.结果表明,试验12Cr2Mo钢正火-回火后的基体组织为贝氏体+少量铁素体,同时大量不规则的M23 C6碳化物在晶界和晶内析出,少量颗粒状的M6C碳化物沿晶界析出,大量细小针状的Mo2C碳化物在晶内析出,该钢力学性能优良-强度Rel 515 ～520 MPa,Rm640 ～ 650 MPa,塑性A 22％～25％,Z 76％～ 80％,以及-60℃冲击功AKv 268～ 293 J.
시험용12Cr2Mo(/％:0.09C,0.30Si,0.34Mn,0.007P,0.006S,2.10Cr,0.93Mo,0.014Al)406 mm×40.5 mm강관적생산류정위120 t BOF-LF-RH-410 mm ×530 mm련주-단제Φ390 mm관배-460 mm ASSEL궤조알제성관.채용JMatPro연건계산실험용강평형상전변도,득출12Cr2Mo강상변점Ac3위862℃,Ac1위781℃,병대910℃정화,700℃회화처리적시험강진행조직화역학성능검험.결과표명,시험12Cr2Mo강정화-회화후적기체조직위패씨체+소량철소체,동시대량불규칙적M23 C6탄화물재정계화정내석출,소량과립상적M6C탄화물연정계석출,대량세소침상적Mo2C탄화물재정내석출,해강역학성능우량-강도Rel 515 ～520 MPa,Rm640 ～ 650 MPa,소성A 22％～25％,Z 76％～ 80％,이급-60℃충격공AKv 268～ 293 J.