摘要
分析了我国Gr.91钢连铸坯的质量现状,对几家钢厂生产的连铸坯P91钢管进行理化检验、高温时效和高温持久试验等,阐述了P91钢管在国内工程应用中面临的疑虑.结果表明:我国Gr.91钢连铸坯冶炼技术成熟,钢质纯净,低倍组织均匀,柱状晶形态良好,中心裂纹分布规律;连铸坯制造的P91钢管的化学成分、力学性能、金相特征等满足标准要求,高温时效后性能稳定,600℃、10万h外推持久强度与传统锻坯钢管相当.建议各方打消疑虑,推动连铸坯P91钢管的工程化应用.
Addressing the remaining doubts about the engineering application of the P91 steel pipe as made of theCC billet that are held by users of the domestic boiler industry,the current quality status of the home-made Gr.91 CCbillet is analyzed.And the P91 steel pipes as manufactured with the CC billet and by a couple of domestic steel works arestudied by means of physical and chemical inspections,and high temperature aging and high temperature creep rupturetests.As a result it is revealed as follows.The domestic melting technology for the Gr.91 CC billet is mature,and thesteel proper possesses advantages as high steel cleanness,homogeneous macrostructure,fine columnar crystalmorphology and regular central crack distribution.The chemical composition,the mechanical properties and themetallographic characteristics of the CC billet-made P91 steel pipe are all in compliance with applicable standardrequirements.Moreover the post-high temperature aging properties of the pipe are stable,and the 600℃100000 hextrapolated creep rupture strength is equivalent to that of the steel tube made of the conventional forged billet.Accordingly it is suggested that all the stakeholders dispel their doubts,and promote the engineering application of theCC billet-made P91 steel pipe.
作者
敬仕煜
刘谦
张新文
曾辉
谢逍原
普晓明
何小明
杨华春
JING Shiyu;LIU Qian;ZHANG Xinwen;ZENG Hui;XIE Xiaoyuan;PU Xiaoming;HE Xiaoming;YANG Huachun(Key Laboratory for Hi-temperature and High Pressure Material&Welding Engineering,DEC Dongfang Boiler Co.,Ltd.,Zigong 643001,China;Jiangyin Xingcheng Special Steel Co.,Ltd.,Jiangyin 214003,China;Jiangsu Yonggang Group Co.,Ltd.,Zhangjiagang 215628,China)
出处
《钢管》
CAS
2022年第5期20-26,共7页
Steel Pipe
作者简介
敬仕煜(1969-),男,高级工程师,主要从事锅炉及压力容器用材料的应用研究工作。
