ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2015, Vol. 36 ›› Issue (3): 61-63.

• 组织和性能 • 上一篇    下一篇

TP310HCbN耐热钢Ф47 mm x 8 mm管材700 ℃持久试验析出行为

方旭东1,2,3,王岩1,2,范光伟2,夏焱1,2,王志斌1,2,韩培德3   

  1. 太原钢铁(集团)有限公司1先进不锈钢材料国家重点实验室;
    2技术中心,太原030003;
    3太原理工大学材料科学与工程学院,太原030003
  • 收稿日期:2014-12-29 出版日期:2015-06-01 发布日期:2022-08-18
  • 作者简介:方旭东(1975-),男,硕士(太原理工大学),高级工程师,1997年天津理工学院(本科)毕业,不锈钢材料研究。
  • 基金资助:
    山西省科技重大专项项目(20111101053),山西省 技术创新项目(2007-046)

Behavior of Precipitation in Ф47 mm x 8 mm Tube of Heat Resistant Steel TP310HCbN during Rupture Test at 700℃

Fang Xudong1,2,3, Wang Yan1,2, Fan Guangwei2, Xia Yan1,2, Wang Zhibin1,2 , Han Peide3   

  1. 1 State Key Laboratory of Advanced Stainless Steel Materials,
    2 Technology Center, Taiyuan Iron and Steel (Group) Co Ltd , Taiyuan 030003 ;
    3 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030003
  • Received:2014-12-29 Published:2015-06-01 Online:2022-08-18

摘要: 通过扫描电镜、透射电镜、能谱分析和硬度试验等方法分析了TP310HCbN耐热钢(/%:0.07C,0.39Si,1.20Mn,25.05Cr,20.40Ni,0.42Nb,0.266N)Ф47mm×8 mm冷轧管经1120~1160℃固溶处理后在700℃ 0~19 570 h持久试验时的析出相。结果表明,TP310HCbN耐热钢700℃95~220 MPa持久试验时间在0~1000 h时,随时间增加,硬度HV值由237增至255,当持久时间超过1 000 h,硬度趋于平稳;随着持久时间增加,该钢晶内析出物由颗粒状转变为棒状,并存在大量与位错相互作用的蠕虫状NbCrN析出物;生产的TP310HCbN耐热钢700℃-100 000外推持久强度为63.65 MPa满足标准要求。

关键词: TP310HCbN耐热钢, Ф47 mmx8 mm管, 析出相, 持久强度

Abstract: The precipitated phases in Ф47 mm x 8 mm cold rolled tube of heat resistant steel TP310HCbN (/% : 0. 07C, 0. 39Si, 1. 20Mn, 25. 05Cr, 20.40Ni, 0.42Nb, 0.266N) solid-solution-treated at 1 120 ~ 1 160 °C then rupture test at 700 °C for 0 ~19 570 h are analyzed by the test method including SEM, TEM, energy spectrum analysis and hardness test. Results show that as the heat resistant steel TP310HCbN rupture test with 95 ~220 MPa at 700 °C for 0 ~ 1 000 h, with increasing test time, the hardness HV value increases from 237 to 255 , as that for more than 1 000 h, the hardness value is no change; with increasing test time, the intragranular precipitates in steel change from granular type to rod type, and there is a lot of wormlike NbCrN precipitates which interacts with dislocation ; the extrapolated rupture strength of produced test heat resistant steel TP310HCbN at 700 ℃ for 100 000 h is 63. 65 MPa to meet the requirement of standard.