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采用Y型和y型坡口的药芯电弧焊钢焊缝冷裂纹率综合分析

Comprehensive Analysis of Cold-Cracking Ratio for Flux-Cored Arc Steel Welds Using Y- and y-Grooves.

作者信息

Nam Hyunbin, Yoo Jaeseok, Yun Kwanghee, Xian Guo, Park Hanji, Kim Namkyu, Song Sangwoo, Kang Namhyun

机构信息

Department of Joining Technology, Korea Institute of Materials Science, Changwon 51508, Korea.

Department of Welding Engineering R&D, Daewoo Shipbuilding & Marine Engineering Co., Ltd., Geoje-si 53302, Korea.

出版信息

Materials (Basel). 2021 Sep 16;14(18):5349. doi: 10.3390/ma14185349.

DOI:10.3390/ma14185349
PMID:34576574
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8471807/
Abstract

This study investigates various factors that influence the cold-cracking ratio (CCR) of flux-cored arc welds through Y- and y-groove tests. Factors affecting the CCR include the alloy component, diffusible hydrogen content, microstructure, hardness, and groove shape. In weld metals (WMs; WM375-R and WM375-B) of a low-strength grade, the diffusible hydrogen content has a more significant effect on the CCR than the carbon equivalent () and microstructure. However, the combined effects of the microstructure and diffusible hydrogen content on the CCR are important in high-strength-grade WM. The CCR of the WM increased upon increasing and the strength grade because hard martensite and bainite microstructures were formed. Moreover, y-groove testing of the 500 MPa grade WM revealed a more significant CCR than that of the 375 MPa grade WM. Therefore, in high-strength-grade WMs, it is necessary to select the groove shape based on the morphology in the real welds.

摘要

本研究通过Y型和y型坡口试验，研究了影响药芯焊丝电弧焊冷裂纹率（CCR）的各种因素。影响CCR的因素包括合金成分、扩散氢含量、微观结构、硬度和坡口形状。在低强度等级的焊缝金属（WMs；WM375-R和WM375-B）中，扩散氢含量对CCR的影响比碳当量（）和微观结构更为显著。然而，在高强度等级的WM中，微观结构和扩散氢含量对CCR的综合影响很重要。随着和强度等级的增加，WM的CCR升高，因为形成了硬马氏体和贝氏体微观结构。此外，500 MPa等级WM的y型坡口试验显示出比375 MPa等级WM更显著的CCR。因此，在高强度等级的WMs中，有必要根据实际焊缝中的形态选择坡口形状。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/aaa1a99f5f66/materials-14-05349-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/0f6d29cfd6a2/materials-14-05349-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/b65e541c1878/materials-14-05349-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/9769222276b9/materials-14-05349-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/c79846feb83f/materials-14-05349-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/891e44a26b53/materials-14-05349-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/265d9126f5ed/materials-14-05349-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/937a2bf4ef89/materials-14-05349-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/8ac906574184/materials-14-05349-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/aaa1a99f5f66/materials-14-05349-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/0f6d29cfd6a2/materials-14-05349-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/b65e541c1878/materials-14-05349-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/9769222276b9/materials-14-05349-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/c79846feb83f/materials-14-05349-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/891e44a26b53/materials-14-05349-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/265d9126f5ed/materials-14-05349-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/937a2bf4ef89/materials-14-05349-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/8ac906574184/materials-14-05349-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f917/8471807/aaa1a99f5f66/materials-14-05349-g009.jpg

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本文引用的文献

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2
Influence of Restraint Conditions on Welding Residual Stresses in H-Type Cracking Test Specimens.拘束条件对H型裂纹试验试样焊接残余应力的影响
Materials (Basel). 2019 Aug 23;12(17):2700. doi: 10.3390/ma12172700.
3
Finite Element Prediction of Residual Stress and Deformation Induced by Double-Pass TIG Welding of Al 2219 Plate.
2219铝合金板材双道TIG焊接残余应力与变形的有限元预测
Materials (Basel). 2019 Jul 12;12(14):2251. doi: 10.3390/ma12142251.