[1]孙咸 编译.焊缝金属对奥氏体不锈钢失延裂纹敏感性的影响[J].焊管,2023,46(1):51-58.[doi:10.19291/j.cnki.1001-3938.2023.01.009]
　Translated by SUN Xian.Effect of Weld Metal on the Susceptibility of Austenitic Stainless Steel to Ductility?ip Cracking[J].,2023,46(1):51-58.[doi:10.19291/j.cnki.1001-3938.2023.01.009]
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焊缝金属对奥氏体不锈钢失延裂纹敏感性的影响()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
46
期数:
2023年第1期
页码:
51-58
栏目:
国外焊管
出版日期:
2023-01-28

文章信息/Info

Title:
Effect of Weld Metal on the Susceptibility of Austenitic Stainless Steel to Ductility?ip Cracking
文章编号:
10.19291/j.cnki.1001-3938.2023.01.009
作者:
孙咸 编译
太原理工大学焊接材料研究所，太原 030024
Author(s):
Translated by SUN Xian
Institute of Welding Consumables, Taiyuan University of Technology, Taiyuan 030024, China
关键词:
焊缝金属; 失延裂纹; 奥氏体不锈钢：铁素体; 奥氏体
Keywords:
weld metal;  ductility?ip cracking;  austenitic stainless steels;  ferrite;  austenite
分类号:
TG406
DOI:
10.19291/j.cnki.1001-3938.2023.01.009
文献标志码:
A
摘要:
采用伍德（Wood）液态金属对GTAW制作的平板堆焊试件淬火，以及光学金相、电子背散射衍射等测试手段，研究了焊缝金属对奥氏体不锈钢失延裂纹（Ductility?ip cracking，DDC）敏感性的影响。结果表明，伍德金属淬火在焊缝熔化区中捕获了高温显微组织细节形貌，揭示了310的淬火诱发DDC敏感性比304、316和321严重得多。304和316均凝固为柱状δ晶粒，沿δ柱状晶粒之间的边界形成了几乎连续的γ；由于γ深入δ生长，δ晶粒被γ牢固地结合在一起，阻碍沿δ晶界的DDC。321凝固为等轴δ晶粒，等轴晶粒的弯曲边界阻碍DDC。310 凝固为粗直的、沿晶界几乎没有δ的γ柱状晶粒，并且晶界迁移变成为局部直的；由此产生的又长又直的裸晶界成为 DDC的理想通道。归纳了奥氏体不锈钢焊缝抗DDC的两种新机制：①沿δ柱状晶的边界形成几乎连续的、非平直的γ；②凝固为等轴δ晶粒。
Abstract:
The effects of weld metal on the sensitivity of austenitic stainless steel to ductility?ip cracking (DDC) were investigated by means of liquid Wood’s metal quenching the plate surfacing specimen made of GTAW, optical metallography and electron backscatter diffraction (EBSD) and other test means. The results show that wood’s metal quenching captures the detailed morphology of elevated?emperature microstructure in weld fusion zone,and reveals that the susceptibility to DDC induced by quenching is much more severe in 310 than in 304、316 and 321. 304 and 316 both solidifies as columnar grains, and resulting in the formation of a nearly continuous γ along the boundaries between columnar δ grains; Since γ grows deep into δ,δ grains are bonded together firmly by γ to resist DDC along δ grain boundaries. 321 solidifies as equiaxed δ grains, and the tortuous boundaries of equiaxed δ grains resist DDC. 310 solidifies as coarse, straight, columnar grains of γ with little δ along grain boundaries,and the grain boundaries migrate to become locally straight. The resulting long, straight, and naked grain boundaries become ideal paths for DDC. Two new mechanisms for resisting DDC in austenitic stainless steel welds are summarized, formation of nearly continuous,non?traight γ along boundaries of columnar δ grains and solidification as equiaxed δ grains.

参考文献/References:

译自：YU P，MORROW J，KOU S. Resistance of Austenitic Stainless Steels to Ductility?ip Cracking：Mechanisms[J].Welding Journal，2021，100（9）：291-301.

相似文献/References:

[1]张红,刘克永,赵与越,等.焊缝金属中Mn含量对螺旋埋弧焊管焊缝性能的影响[J].焊管,2010,33(3):71.[doi:1001－3938（2010）0３－0071－05]
　Edited and Translated by ZHANG Hong,LIU Ke-yong,ZHAO Yu-yue,et al.The Effect Of Weld Metal Manganese Content On The Microstructure,Mechanical Properties And Hot Crack Susceptibility Of Helically Welded Linepipes[J].,2010,33(1):71.[doi:1001－3938（2010）0３－0071－05]

备注/Memo

备注/Memo:
收稿日期：2022-02-22
译者简介：孙咸，男，教授，主要从事焊接材料及金属焊接性方面的研究和教学工作，对焊接材料软件开发具有丰富经验；获国家科技进步二等奖1项（2000年），省（部）级科技进步一等奖2项，二等奖3项，1992年获国务院颁发的政府特殊津贴，已发表学术论文200余篇。
更新日期/Last Update: 2023-02-14