坡口角度对K形对接接头组织与疲劳性能的影响
Effect of Groove Angle on Microstructure and Fatigue Properties of K-butt Joint
- 2025年55卷第1期 页码:108-114
纸质出版日期: 2025-01-20
DOI: 10.7512/j.issn.1001-2303.2025.01.15
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纸质出版日期: 2025-01-20 ,
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暴兴威,许鸿吉,宋睿,等.坡口角度对K形对接接头组织与疲劳性能的影响[J].电焊机,2025,55(1):108-114.
BAO Xingwei, XU Hongji, SONG Rui, et al.Effect of Groove Angle on Microstructure and Fatigue Properties of K-butt Joint[J].Electric Welding Machine, 2025, 55(1): 108-114.
为解决Q450NQR1耐候钢K形坡口对接接头的坡口角度选择问题,以45°、50°、60°K形坡口对接接头为研究对象,对三种坡口角度的对接接头进行了金相、疲劳试验,分析阐述了坡口角度对接头金相组织分布与疲劳性能的影响;此外,通过对疲劳断口的扫描观察,分析了其断裂特征与机理。试验结果表明:各坡口角度对接接头各区域的组织成分相近,焊缝柱状晶粒宽度及粗晶区晶粒尺寸与坡口角度成正比;45°、50°、60°K形坡口对接接头的疲劳极限依次为151 MPa、147.5 MPa、135 MPa,疲劳极限与坡口角度成反比;疲劳试件断口启裂区和扩展区具有典型的疲劳断裂特征,扩展区存在较为明显的疲劳弧线,终断区可观察到典型的韧窝组织;坡口角度越大,扩展区疲劳弧线与终断区韧窝组织越稀疏。
In order to solve the problem of groove Angle selection of K groove butt joint of Q450NQR1 weathering steel
this paper takes 45°
50° and 60°K groove butt joint as the research object
metallographic and fatigue tests are carried out on the three kinds of groove Angle butt joint
and the influence of groove Angle on the metallographic distribution and fatigue performance of the joint is analyzed. In addition
the fracture characteristics and mechanism are analyzed by scanning observation of fatigue fracture. The test results show that the microstructure composition of the butt joint is similar in each area of the groove Angle
and the grain width of the weld column and grain size of the coarse-grain zone are proportional to the groove Angle. The fatigue limits of 45°
50°
60°K beveled butt joints are 151 MPa
147.5 MPa
135 MPa
and the fatigue limit is inversely proportional to the beveled Angle. The fracture initiation zone and the extension zone of the fatigue specimen have typical fatigue fracture characteristics
there is obvious fatigue arc in the extension zone
and the typical dimple structure can be observed in the final fault zone. The larger the Angle of the groove
the more sparse the fatigue arc and dimple structure in the extended zone.
陈增有 . Q450NQR1高强度耐候钢的焊接 [C]//中国铁道学会车辆委员会. 铁路货车制造工艺学术研讨会论文集 . 中国铁道学会车辆委员会 , 2007 : 151 - 156 .
王喜君 , 何嘉 , 蒋立影 , 等 . Q450NQR1高强度耐候钢的焊接工艺性研究 [J]. 焊接技术 , 2015 , 44 ( 10 ): 38 - 40 .
WANG X J , HE J , JIANG L Y , et al . Research on Welding Processability of Q450NQR1 High Strength Weathering Steel [J]. Welding Technology , 2015 , 44 ( 10 ): 38 - 40 .
黄显峰 , 赵娇玉 , 黄君辉 , 等 . 不同热输入Q450NQR1钢焊接过热区组织、硬度和冲击韧性的研究 [J]. 电焊机 , 2020 , 50 ( 4 ): 107 - 110 .
HUANG X F , ZHAO J Y , HUANG J H , et al . Study on microstructure,hardness and impact toughness of welding overheated zone of Q450NQR1 steel with different heat inputs [J]. Electric Welding Machine , 2020 , 50 ( 4 ): 107 - 110 .
黄显峰 , 韩景茹 , 黄君辉 , 等 . 不同形状的耐候钢T形角接接头疲劳性能研究 [J]. 电焊机 , 2024 , 54 ( 1 ): 114 - 119 .
HUANG X F , HAN J R , HUANG J H , et al . Research on Fatigue Properties of Weathering Steel T-shaped Fillet Joints with Different Shapes [J]. Electric Welding Machine , 2024 , 54 ( 1 ): 114 - 119 .
Fricke W , Gao L Y , Paetzold H . Fatigue assessment of local stresses at fillet welds around plate corners [J]. International Journal of Fatigue , 2017 , 101 ( 2 ): 169 - 176 .
吴圣川 , 任鑫焱 , 康国政 , 等 . 铁路车辆部件抗疲劳评估的进展与挑战 [J]. 交通运输工程学报 , 2021 , 21 ( 01 ): 81 - 114 .
WU S C , REN X Y , KANG G Z , et al . Progress and challenge on fatigue resistance assessment of railway vehicle components [J]. Journal of Traffic and Transportation Engineering , 2021 , 21 ( 01 ): 81 - 114 .
闫桂玲 , 王弘 , 康国政 , 等 . 高速列车用6065A铝合金超高周疲劳性能试验研究 [J]. 中国铁道科学 , 2014 , 35 ( 1 ): 67 - 71 .
YAN G L , WANG H , KANG G Z , et al . Experimental Study on the Very High Cycle Fatigue Properties of 6065A Aluminum Alloy for High Speed Train [J]. China Railway Science , 2014 , 35 ( 1 ): 67 - 71 .
魏守征 , 王志英 , 任晓鹏 , 等 . 坡口角度及焊丝偏移量对钛/铝冷弧MIG焊接头显微组织与力学性能的影响 [J]. 焊接学报 , 2021 , 42 ( 08 ): 59-66+100 - 101 .
WEI S Z , WANG Z Y , REN X P , et al . Influence of bevel angle and wire offset on the microstructure and mechanical properties of Ti/Al joint by cold arc MIG welding [J]. Transactions of The China Welding Institution , 2021 , 42 ( 08 ): 59-66+100 - 101 .
Akbari D , Farahani M , Soltani N . Effects of the weld groove shape and geometry on residual stresses in dissimilar butt-welded pipes [J]. The Journal of Strain Analysis for Engineering Design , 2012 , 47 ( 2 ): 73 - 82 .
Wang S , Wei L M , Cheng Y , et al . Post-weld Heat Treatment and Groove Angles Affect the Mechanical Properties of T92/Super 304H Dissimilar Steel Weld Joints [J]. High Temperature Materials and Processes , 2018 , 37 ( 7 ): 649 - 654 .
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