摘要
设计开发了低碳铌钛微合金化600 MPa级塔式起重机钢,并利用光学显微镜对带钢组织进行观察。结果表明:该高韧性钢显微结构主要为针状铁素体+粒状贝氏体;通过拉伸试验和夏比冲击试验对该钢种的物理性能进行检验,其力学性能满足设计要求,拉伸断口无明显分层现象,-20℃低温冲击韧性达到200 J以上。
A low-carbon niobium titanium microalloyed 600 MPa tower crane steel was designed and developed,and the microstructure of the strip was observed using an optical microscope.The results indicate that the microstructure of the high toughness steel is mainly composed of acicular ferrite and granular bainite.The physical properties of the steel were tested through tensile testing and Charpy impact testing,and its mechanical properties met the design requirements.There was no obvious layering phenomenon on the tensile fracture surface,and the low-temperature impact toughness at-20℃reached over 200 J.
作者
冯向飞
马文东
Feng Xiangfei;Ma Wendong(Hot Rolling Business Unit of HBIS Group Tangsteel Company,Tangshan Hebei 063016,China)
出处
《山西冶金》
CAS
2024年第2期52-53,共2页
Shanxi Metallurgy
关键词
低温韧性
微合金化
起重机用钢
low-temperature toughness
microalloying
steel for cranes
