高级别管线钢X100的试验研究  

Experimental Study on X100 Pipeline Steel

作　　者：王路兵[1] 任毅[2] 张鹏程[1] 武会宾[1] 唐荻[1] 

机构地区：[1]北京科技大学高效轧制国家工程研究中心,北京100083 [2]鞍山钢铁集团公司技术中心,辽宁鞍山114001

出　　处：《钢铁》2008年第1期80-84,共5页Iron and Steel

摘　　要：通过合理的组织、成分设计,在实验室试制成功X100管线钢。利用光学显微镜、透射电镜与背散射电子衍射技术（EBSD）,研究了X100钢不同组织构成对力学性能的影响规律及其合理的控冷制度,并通过Gleeble-1500热模拟机获得了试验钢的CCT曲线。结果表明,少量AF（Acicular Ferrite）、GB（Granular Bainite）组织的出现,可使原奥氏体晶粒得到分割,抑制板条束的过分长大,使板条贝氏体束的有效晶粒尺寸得到显著细化,钢板具有最优的细化组织,塑韧性得到明显改善;冷却速度为20-25℃/s,终冷温度为380℃时,钢板可获得最佳的组织构成与最优的综合力学性能,屈服强度为775 MPa,抗拉强度为855 MPa,伸长率为16.6%,冲击功（-20℃）为218 J。By proper composition and microstructure designing, the test X100 pipeline steels were prepared successfully in lab. The effect of microstructure on mechanical properties was studied with OM, TEM , EBSD analysis, and continuous cooling transformation curves were obtained with Gleeble--1500 thermomechanical simulator. The result indicates, the specimen rolled with final cooling temperature of about 380 72 and cooling speed of 20--25 ℃/s consists of lath like bainite, granular bainite and acicular ferrite,and has optimum microstructure and excellent integrated mechanical properties：ReL=775 MPa, Rm,=845 MPa,A=16.6%,4 ,AKv（-20℃） =-218 J.

关 键 词：X100钢 显微组织 背散射电子衍射技术 

分 类 号：TG142.15[一般工业技术—材料科学与工程]