摘要
以废钢、废机铁及回炉料为主要原料,配以增碳剂和球化剂,通过中频炉熔炼,同步生产出了铁素体球墨铸铁管件及其Y形单铸试样。单铸试样的力学性能测试及金相组织观察结果表明:所生产的球墨铸铁其抗拉强度平均为455.0 MPa,屈服强度平均为328.2 MPa,布氏硬度平均为171.0 HBW,伸长率平均达到15.3%,优于GB/T 1348-2019中QT450-10的性能指标;基体组织为多边形铁素体,球状石墨分布均匀、圆整度较好、大小相差不大,有点状石墨存在,能够满足此类管件产品的性能要求。
With scrap steel,machine scrap iron and the return scrap as the main materials,together with carburetor and spheroidizer,the ferrite nodular cast iron pipeline and its Y-type cast samples were produced simultaneously by melting in the medium-frequency furnace.The mechanical property test and metallographic observation of the Y-type cast sample show that,the average tensile strength of the nodular cast iron is 455.0 MPa,the yield strength is 328.2 MPa,the Brinell hardness is 171.0 HBW,and the elongation reaches 15.3%,which is superior to QT450-10 in GB/T 1348-2019.The matrix structure is polygonal ferrite and the spherical graphite is evenly distributed,with satisfying roundness and similar size,and there is also dot graphite in it,which can meet the property requirements for such pipelines.
作者
温朝江
苑少强
唐小松
孙新雅
杨跃辉
WEN Chao-jiang;YUAN Shao-qiang;TANG Xiao-song;SUN Xin-ya;YANG Yue-hui(Tangshan Jinghua Steel Pipe Co.,Ltd,Tangshan 063020,China;Hebei Key Laboratory of Intelligent Equipment Digital Design and Process Simulation,Tangshan University,Tangshan 063000,China)
出处
《唐山学院学报》
2023年第3期51-54,共4页
Journal of Tangshan University
基金
唐山市科技创新团队培养计划项目(20130209D)
河北省钢管表面保护涂层技术创新中心(筹建)项目(SG2021051)。
关键词
废机铁
废钢
球墨铸铁管件
力学性能
金相组织
machine scrap iron
scrap steel
nodular cast iron pipeline
mechanical properties
microstructure
