Advanced Search
CAO Rui, YANG Zhaoqing, LI Jinmei, LEI Wanqing, ZHANG Jianxiao, CHEN Jianhong. Influence of fraction of coarse-grained heat affected zone on impact toughness for 09MnNiDR welded joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(5): 7-13. DOI: 10.12073/j.hjxb.20190818003
Citation: CAO Rui, YANG Zhaoqing, LI Jinmei, LEI Wanqing, ZHANG Jianxiao, CHEN Jianhong. Influence of fraction of coarse-grained heat affected zone on impact toughness for 09MnNiDR welded joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(5): 7-13. DOI: 10.12073/j.hjxb.20190818003
shu

Influence of fraction of coarse-grained heat affected zone on impact toughness for 09MnNiDR welded joint

  • 1.

    State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou, 730050, China

  • 2.

    Lanzhou Ls Testing Technology Co., Ltd., Lanzhou ,730000, China

  • 3.

    Lanzhou Ls Heavy Equipment Co.,Ltd., Lanzhou ,730314, China

More Information
  • Received Date: August 17, 2019
  • Available Online: September 26, 2020
    Graphical Abstract
    • Abstract
  • The impact absorbed energy of various regions of the heat affected zone(HAZ) of submerged arc welding actual welded joint for 09MnNiDR low temperature pressure vessel steel was measured, the microstructures, fracture surface were observed and anlyzed. Based on the experimental results, the microstructures of all regions of HAZ, the weakest region can be determined, and the effects of the weakest region on impact toughness of the welded joint were further discussed. The results show that at −70 °C, the average impact absorbed energy of the base metal, subcritical heat affected zone, intercritical heat affected zone, and fine grain heat affected zone of the welded joint is above 270 J, which all show good toughness. The average impact absorbed energy of the weld metal is 139 J. The coarse grain heat affected zone (CGHAZ) is the weakest region of the welded joint. When the notch tip is completely composed of CGHAZ, the impact absorbed energy of 20 J is reached. The impact energy of CGHAZ decrease to 92.7% of the base metal. The microstructure of CGHAZ is composed of coarse granular bainite, lath bainite and block ferrite. With the increase of the fraction of CGHAZ in front of the notch tip, the closer from notch location is, the lower the impact absorbed energy of the specimen is, which fully reflects the influence of the weakest region on the impact toughness.
    • FullText(HTML)
    • References (13)
  • Lan L, Qiu C, Zhao D, et al. Analysis of microstructural variation and mechanical behaviors in submerged arc welded joint of high strength low carbon bainitic steel[J]. Materials Science & Engineering A, 2012, 558(12): 592 − 601.
    Yang Y, Cheng J, Nie W J, et al. Investigation on the microstructure and toughness of coarse grained heat affected zone in X-100 multi-phase pipeline steel with high Nb content[J]. Materials Science & Engineering A, 2012, 558(12): 692 − 701.
    崔冰, 彭云, 彭梦都, 等. 焊接热输入对Q890高强钢热影响区裂纹扩展的影响[J]. 焊接学报, 2017, 38(8): 63 − 67. doi: 10.12073/j.hjxb.20150617003

    Cui Bing, Peng Yun, Peng Mengdu, et al. Effect of heat input on crack growth behavior of CGHAZ of Q890 high-performance steel[J]. Transactions of the China Welding Institution, 2017, 38(8): 63 − 67. doi: 10.12073/j.hjxb.20150617003
    Zhou Y, Jia T, Zhang X, et al. Microstructure and toughness of the CGHAZ of an offshore platform steel[J]. Journal of Materials Processing Technology, 2015, 219(5): 314 − 320.
    Zhu Z, Han J, Li H. Influence of heat input on microstructure and toughness properties in simulated CGHAZ of X80 steel manufactured using high-temperature processing[J]. Metallurgical and Materials Transactions A, 2015, 46(11): 5467 − 5475. doi: 10.1007/s11661-015-3122-y
    秦华, 苏允海, 连景宝. BWELDY960Q钢焊接热模拟热影响区组织与性能[J]. 焊接学报, 2018, 39(11): 97 − 101.

    Qin Hua, Su Yunhai, Lian Jingbao. Microstructure and properties in heat affected zone of BWELDY960Q steel by welding thermal simulation test[J]. Transactions of the China Welding Institution, 2018, 39(11): 97 − 101.
    Jang J, Ju J, Lee B, et al. Effects of microstructural change on fracture characteristics in coarse- grained heat- affected zones of QLT-processes 9% Ni steel[J]. Materials Science & Engineering A, 2003, 340(1-2): 68 − 79.
    Yang S, Ju L, Cong W. On the heterogeneous microstructure development in the welded joint of 12MnNiVR pressure vessel steel subjected to high heat input electrogas welding[J]. Journal of Materials Science & Technology, 2019, 35(8): 1747 − 1752.
    Cao R, Yang Z, Chan Z, et al. The determination of the weakest zone and the effects of the weakest zone on the impact toughness of the 12Cr2Mo1R welded joint[J]. Journal of Manufacturing Processes, 2020, 50(2): 539 − 546.
    Chen J, Cao R. Micromechanism of cleavage fracture of metals[M]. USA: Elsevier, 2014.
    Wang X, Wang X, Shang C, et al. Characterization of the multi-pass weld metal and the impact of retained austenite obtained through intercritical heat treatment on low temperature toughness[J]. Materials Science & Engineering A, 2016, 649(1): 282 − 292.
    Liang Y, Chun L, De W, et al. Microstructural characteristics and toughness of the simulated coarse grained heat affected zone of high strength low carbon bainitic steel[J]. Materials Science & Engineering A, 2011, 529(11): 192 − 200.
    文明月, 董文超, 庞辉勇, 等. 一种Fe-Cr-Ni-Mo高强钢焊接热影响区的显微组织与冲击韧性研究[J]. 金属学报, 2018, 54(4): 501 − 511. doi: 10.11900/0412.1961.2017.00331

    Wen Mingyue, Dong Wenchao, Pang Huiyong, et al. Microstructure and impact toughness of welding heat affected zones of a Fe-Cr-Ni-Mo high strength steel[J]. Acta Metallurgica Sinica, 2018, 54(4): 501 − 511. doi: 10.11900/0412.1961.2017.00331
    • Related Articles

  • Cited by

    Periodical cited type(4)

    1. 张明，周磊磊，梁恩荣，朱志刚，张朋彦. 22MnB5/QStE550TM异种钢焊接接头组织与性能分析. 过程工程学报. 2024(07): 863-874 .
    2. 李赫，王磊，黄勇，周明，周琦，王克鸿. 预热温度对AH36激光焊缝组织及硬度的影响. 焊接. 2021(10): 25-28+62 .
    3. 岑耀东，陈芙蓉，陈林. 异种钢电阻塞焊飞溅缺陷的产生机理. 焊接学报. 2019(12): 115-120+166 . 本站查看
    4. 陈丽园，苗佳，穆云平，郝晓卫，宗桓旭. 异种耐候钢塞焊接头组织与疲劳性能研究. 电焊机. 2018(07): 67-71 .

    Other cited types(1)

Catalog

    Get Citation
    PDF
    XML
    Article views (306) PDF downloads (23) Cited by(5)
    Turn off MathJax
    Article Contents
    Abstract
    References

    Website Copyright © Editorial Office of Transactions of the China Welding Institution, Welding Journals Publishing HouseTel：0451-86323218Address：No. 2077, Chuangxin Road, Songbei District, Harbin

    Supported by: Beijing Renhe Information Technology Co. Ltd    Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return