Chinese Journal of Ship Research, Volume. 19, Issue 4, 271(2024)
Evaluation of residual stress and its influence on fracture performance of Q690 thick plate butt welded joint
Figures & Tables(22)
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Table 1. Welding process parameters of Q690 high-strength steel thick plate
View tableView in ArticleTable 1. Welding process parameters of Q690 high-strength steel thick plate
类别 电流/A 电压/V 焊接速度/(mm·s−1) 层间温度/℃ 打底焊 140～150 26～27 2～3 150 填充及盖面焊 160～170 26～27 2～3 200～300
Table 2. Thermal property parameters of Q690 high-strength steel and weld metal
View tableView in ArticleTable 2. Thermal property parameters of Q690 high-strength steel and weld metal
温度/℃ 比热/(kJ·kg−1·℃) 热传导/(W·m−1·℃−1) 密度/(kg·m−3) 20 0.469 59.5 7 860 200 0.523 57.8 7 860 400 0.595 45.6 7 860 600 0.741 36.8 7 860 800 0.960 30.0 7 860 1 000 0.640 27.6 7 860 1 400 0.661 29.7 7 860
Table 3. Mechanical property parameters of Q690 high-strength steel and weld metal
View tableView in ArticleTable 3. Mechanical property parameters of Q690 high-strength steel and weld metal
温度/℃ 杨氏模量/GPa 泊松比 屈服强度/MPa 线膨胀系数 20 198.0 0.289 690.0 1.56×10−5 100 195.0 0.292 687.0 1.65×10−5 200 191.0 0.296 683.0 1.72×10−5 300 184.0 0.300 634.0 1.78×10−5 400 176.0 0.304 586.0 1.83×10−5 500 166.0 0.308 538.0 1.89×10−5 600 155.0 0.312 364.0 1.94×10−5 800 132.0 0.333 116.0 2.05×10−5 1 000 109.0 0.345 42.6 2.11×10−5 1 100 98.0 0.351 23.8 2.14×10−5 1 200 93.5 0.357 1.2 2.18×10−5 1 300 90.0 0.363 0 2.18×10−5 1 400 80.0 0.369 0 2.18×10−5
Table 4. Comparison of measured and predicted microstructure volume fraction in weld zone and heat affected zone
View tableView in ArticleTable 4. Comparison of measured and predicted microstructure volume fraction in weld zone and heat affected zone
微观组织 焊缝区体积分数 热影响区体积分数 测量值 预测值 测量值 预测值 马氏体 0.300 0.223 0.806 0.808 贝氏体 0.560 0.640 0.183 0.177 奥氏体−铁素体−珠光体 0.140 0.137 0.011 0.015
Table 5. Mechanical property parameters of base metal, weld metal and butt joint specimens
View tableView in ArticleTable 5. Mechanical property parameters of base metal, weld metal and butt joint specimens
类别 屈服强度 /MPa 抗拉强度 /MPa 断裂强度 /MPa 应变强化 系数/(K·MPa−1) 应变强化 指数/N 母材 710.1 799.2 569.7 1 074 0.084 对接接头 707.6 829.9 609.4 1 103 0.081
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Jiangchao WANG, Shizhong DU, Yexing NIU, Qingya ZHANG, Hongquan ZHAO, Lei WU, Zhen CHEN. Evaluation of residual stress and its influence on fracture performance of Q690 thick plate butt welded joint[J]. Chinese Journal of Ship Research, 2024, 19(4): 271
Paper Information
Category: Ship Structure and Fittings
Received: Mar. 23, 2023
Accepted: --
Published Online: Mar. 14, 2025
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