| 核电用不锈钢双钨极氩弧焊接头组织与性能 |
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| 引用本文： | 程小华,李小宇.核电用不锈钢双钨极氩弧焊接头组织与性能[J].焊接学报,2022,43(7):108-112. |
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| 作者姓名： | 程小华 李小宇 |
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| 作者单位： | 1.中国核工业华兴建设有限公司, 南京, 210019 |
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| 摘 要： | 针对核电站乏燃料不锈钢水池6 mm厚的304L不锈钢板材，采用高效双钨极氩弧焊工艺焊接试板，对双钨极氩弧焊接头进行拉伸性能、冲击性能、弯曲性能、硬度、金相组织、铁素体含量、抗晶间腐蚀性能及粗晶区晶粒度评级等试验研究. 结果表明，采用双钨极氩弧焊焊接核级304L不锈钢材料，焊接接头综合性能良好；双热源的工艺虽然增加了热量，但金相组织仍为奥氏体和少量铁素体的典型形貌，铁素体含量在5% ~ 12%范围内，同时焊接接头粗晶区未发现明显的粗化现象，具备一定的抗热裂性能且保持了良好的塑韧性；晶间腐蚀试验未发现接头有敏化现象，表明该焊接接头耐腐蚀性能优良. 综上试验说明核电站不锈钢水池双钨极氩弧焊接头综合性能可靠.
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| 关 键 词： | 双钨极氩弧焊 核电站 304L不锈钢 高效 |
| 收稿时间： | 2022/4/9 0:00:00 |
Structure and properties of the double tungsten argon arc hybrid welding joint of stainless steel used in nuclear power plant |
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| CHENG Xiaohu,LI Xiaoyu.Structure and properties of the double tungsten argon arc hybrid welding joint of stainless steel used in nuclear power plant[J].Transactions of The China Welding Institution,2022,43(7):108-112. |
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| Authors: | CHENG Xiaohu LI Xiaoyu |
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| Affiliation: | 1.China Nuclear Industry Huaxing Construction Co., Ltd. , Nanjing, 210019, China2.Harbin Welding Institute Limited Company, Harbin, 150028, China |
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| Abstract: | For 304L stainless steel plate with the thickness of 6 mm used in the welding of stainless steel pool of nuclear power plant, the comprehensive evaluation of the double tungsten argon arc hybrid welding joint is carried out. The tensile properties, impact properties, bending properties, hardness, structure, ferrite content, intergranular corrosion resistance and coarse-grained grain size rating are tested and comprehensively analyzed. The results show that the comprehensive properties of the welded joint are good when the nuclear grade 304L stainless steel is welded with the double tungsten argon arc hybrid welding. Although the dual heat source process increases the heat, the structure is made of austenite and a small amount of ferrite, and the ferrite content is in the range of 5%−12%. At the same time, no obvious coarsening phenomenon is found in the coarse-grained zone of the welded joint, and the joint has certain hot cracking resistance and good plasticity toughness. No sensitization is found in the intergranular corrosion test, and this welded joint has excellent corrosion resistance. To sum up, the comprehensive performance of the double tungsten argon arc hybrid welding joint of the stainless steel pool used in the nuclear power plant is reliable. |
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| Keywords: | double tungsten argon arc hybrid welding|nuclear power plant|304L stainless steel|high efficiency |
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