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 (1): 60-61.

• 组织和性能 • 上一篇    下一篇

马氏体耐热钢P91 ∅336 mm x31 mm管材焊接接头的组织和力学性能

赵振铎, 陈金虎, 原凌云, 潘小娟   

  1. 山西太钢不锈钢股份有限公司技术中心,太原030003
  • 收稿日期:2014-07-29 出版日期:2015-02-01 发布日期:2022-08-31
  • 作者简介:赵振铎(1980-),男,博士(北京科技大学),高级工程师,特殊钢新产品开发和工艺研究。

Structure and Mechanical Properties of Welded Joint of ∅336 mm x 31 mm Pipe of Martensite Heat Resistant Steel P91

Zhao Zhenduo, Chen Jinhu, Yuan lingyun, Pan Xiaojuan   

  1. Technology Center, Shanxi Taigang Stainless Steel Co Ltd, Taiyuan 030003
  • Received:2014-07-29 Published:2015-02-01 Online:2022-08-31

摘要: 通过ER90S-B9焊丝和焊条(/%:0.08~0.12C,0.4~0.6Si,0.5~1.4Mn,8.5~10.5Cr,0.85~1,15Mo,0.18~0.29V,0.06~0.10Nb,≤0.015A1,0.03~0.07N)对P91钢管(/%:0.09C,0.45Si,0.32Mn,8.9Cr,0.95Mo,0.21V,0.78Nb,0.014Al,0.05N)进行氩弧焊打底、焊条电弧焊填充及盖面焊接。结果表明,P91钢焊缝无裂纹、夹渣、弧坑、气孔等缺陷,焊缝组织为回火索氏体,部分区域为回火马氏体,母材和热影响区为回火索氏体;接头的抗拉强度Rm653~665 MPa,屈服强度Rp0.2;497~504 MPa,伸长率A 21.8%~22.9%,冲击功63.8~77.2 J,均满足GB5310-2008及AMSE SA335-2007标准要求。

关键词: 马氏体耐热钢P91, 钢管, 焊接接头, 组织, 力学性能

Abstract: The welding process with tungsten-arc inert (argon)-gas (TIG) backing, shielded metal-arc welding (SMAW) covered electrode filling and capping on P91 steel tube (/%: 0. 09C, 0.45Si, 0. 32Mn, 8. 9Cr, 0.95Mo, 0. 21V, 0. 78Nb, 0.014A1, 0. 05N) has been carried out by using ER90S-B9 welding wire and covered electrode (/%: 0. 08 ~0. 12C, 0.4~0.6Si, 0.5 ~1.4Mn, 8.5 ~10.5Cr, 0.85 ~1. 15Mo, 0. 18-0.29V, 0.06~0.10Nb, ≤0.015A1, 0. 03 ~0. 07N). Results show that the welded joint of P91 steel tube without crack, sla^ inclusions , crater and blowhole etc welding seam defects, the structure of welding seam is tempered sorbite with tempered martensite in partial region and the structure of base metal and heat affected zone is tempered sorbite; of welding joint the mechanical properties are tensile strength Rm 653 ~ 665 MPa, yield strength Rp0.2 497 〜504 MPa, elongation A 21.8% ~ 22, 9% , and impact energy 63. 8 ~77. 2 J all meet the requirement of standard GB5310-2008 and AMSE SA 335-2007.