期刊文献+

长期高温时效对有碳迁移发生的焊接接头的影响 被引量:2

Influence of long-term aging at elevated temperature on welds with carbon migration
原文传递
导出
摘要 该文以采用9%Cr含B铁素体耐热钢为母材、2.25%Cr为填充金属的接头为对象,研究了高温时效过程对接头中的碳迁移层及其附近区域的影响。研究发现:经高温时效后,接头富碳区中的析出物发生粗化且数量增多,而贫碳区中析出物变化不大,导致贫/富碳层的硬度差异增大。有限元计算结果表明:在接头受载情况下,贫碳区会成为首先破坏的部位,并且高温时效会加剧这种破坏。透射电镜(TEM)结果表明:9%Cr含B钢热影响区(HAZ)中的晶界析出物在时效后粗化不明显,而晶内析出物则发生了明显的粗化,这主要是由于B在晶界聚集并通过占据析出物周围的空位阻碍了析出物粗化。 This study uses 9%Cr parent metal containing boron and 2.25%Cr weld metal to study the influence of long-term aging at elevated temperature on the carbon migration between the parent metal and weld metal. The size and number of precipitates in the carbon-enriched zone increase after long-term aging, but the precipitates in the carbon-denuded zone change little, which increases the differences in the mechanical properties between the carbon-enriched and carbon denuded zones. Finite element analyses indicate that the carbon-denuded zone is damaged first by bearing loads with the damage increasing with long-term aging. Transmission electron microscope (TEM) pictures show that the precipitates at the grain boundaries of the heat affected zone in the 9%Cr parent metal change little, but precipitates inside the grains become coarse after long-term aging. Boron is responsible for the changes of the precipitates at grain boundaries and inside the grains,because the boron tends to segregate at the grain boundaries, which slows coarsening of the precipitates by occupying vacancies around the precipitates.
出处 《清华大学学报(自然科学版)》 EI CAS CSCD 北大核心 2015年第10期1051-1055,共5页 Journal of Tsinghua University(Science and Technology)
基金 上海市科学技术委员会资助项目(13DZ1101504)
关键词 9%Cr含B钢 高温时效 碳迁移 析出物 硬度 有限元分析 9%Cr steel containing boron long-term aging at elevated temperature carbon migration precipitates hardness finite element analysis
  • 相关文献

参考文献12

  • 1Albert S K, Gills T P S, Tyagi A K, et al. Soft zone formation in dissimilar welds between two Cr-Mo steels [J]. Welding Journal: Welding Research Supplement, 1997, 76(3) : 135 - 142.
  • 2Lundin C D, Khan K K, Yang D. Effect of carbon migration in Cr-Mo weldments on metallurgical structure and mechanical properties: Report No. 1 :J3. WRC Bull, 1996, 407 : 1 - 49.
  • 3Inoue A, Masumoto T. Carbide reactions (M3C→ M7C3 → Mz3C6→ M6C) during tempering of rapidly solidified high carbon Cr-W and Cr-Mo steels I-J3. Metallurgical Transactions A, 1980, 11(5): 739-747.
  • 4Skleni:ka V, Kucha:ovd K, Svoboda M, et al. Long-term creep behavior of 9% - 12% Cr power plant steels I-J]. Materials Characterization, 2003, 51(1) : 35 - 48.
  • 5郑阳,沈士明.Cr-Mo钢焊接接头中碳迁移现象研究的现状与进展[J].机械设计与制造工程,2002,31(1):55-57. 被引量:14
  • 6You Y Y, Shiue R K, Shiue R H, et al. The study of carbon migration in dissimilar welding of the modified 9Cr-lMo steel [J]. Journal of Materials Science Letters, 2001, 20(15): 1429 - 1432.
  • 7Pavlina E J, Van Tyne C J. Correlation of yield strength and tensile strength with hardness for steels [J]. Journal of Materials Engineering and Performance, 2008, 17(6) : 888 - 893.
  • 8Bao Y W, Wang W, Zhou Y C. Investigation of the relationship between elastic modulus and hardness based on depth-sensing indentation measurements [J]. Acta Materialia, 2004, 52(18) : 5397 - 5404.
  • 9Francis J A, Mazur W, Bhadeshia H. Review Type IV cracking in ferritic power plant steels [J]. Materials Science and Technology, 2006, 22(12): 1387-1395.
  • 10Watanabe T, Tabuchi M, Yamazaki M, et al. Creep damage evaluation of 9Cr-IMo-V-Nb steel welded joints showing Type IV fracture [J]. International Journal of Pressure Vessels and Piping, 2006, 83(1) : 63 - 71.

二级参考文献6

  • 1Lundin C D. Dissimilar metal welds - transition joints literature review [ J ]. Welding Journal, 1982,61 (2): 58 s.
  • 2Lundin C D, Khan K K, Yang D. Effect of carbon migration in Cr - Mo weldldents on metallurgical structure and mechanical properties[ J ]. WRC Bulletin, 1995 (407): 1.
  • 3兰光.碳扩散对铁素体—奥氏体钢焊接接头机械、工艺性能的影响[J].国外焊接技术,1976,(2):19-20.
  • 4John F Eckel. Diffusion across dissimilar metal joints[J]. Welding Journal, 1964,43(4): 175 s.
  • 5喻红梅.Cr5Mo与0Cr18Ni9Ti异种钢焊接接头组织与性能的研究[D].北京:航空工业部第六二一研究所,1988.
  • 6Lundin C D,Khan K K.Effect of heat treatment on the elevated temperature properties of a 2 1/4Cr- 1 Mo submerged are weldment[J]. WRC Bulletin, 1995(405) :22.

共引文献13

同被引文献29

引证文献2

二级引证文献4

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部