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| S32101双相不锈钢单道多层激光填丝熔覆层研究 |
| Study on Single Pass Multilayer Laser Filament Cladding of S32101 Duplex Stainless Steel |
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| DOI：10.3969/j.issn.1674-6457.2022.12.020 |
| 中文关键词: 双相不锈钢 单道多层 激光熔覆 耐腐蚀性能 |
| 英文关键词: duplex stainless steel single channel and multi-layer laser cladding corrosion resistanc |
| 基金项目:国家重大科技专项(2018ZX06002006) |
| Author Name | Affiliation | | LIU Kai-yu | Beijing Institute of Petrochemical Technology, School of Mechanical Engineering, Beijing 102627, China | | ZHU Jia-lei | Beijing Institute of Petrochemical Technology, School of Mechanical Engineering, Beijing 102627, China | | LI Cong-wei | Beijing Institute of Petrochemical Technology, School of Mechanical Engineering, Beijing 102627, China | | WANG Kai | Beijing University of Chemical Technology, School of Mechanical and Electrical Engineering, Beijing 10029, China | | MIAO Chun-yu | Beijing Institute of Petrochemical Technology, School of Mechanical Engineering, Beijing 102627, China |
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| 中文摘要: |
| 目的 针对新型核电站乏燃料水池双相不锈钢厚板缺陷的修复，进行激光单道多层熔覆基础实验。方法 采用ER–2209焊丝在S32101双相不锈钢覆面制备出熔覆层，通过宏观形貌、微观组织、力学检测和耐腐蚀检测，研究S32101双相不锈钢激光填丝熔覆层的性能。结果 经过多次焊接热循环后，熔覆层中奥氏体组织以一次奥氏体与二次奥氏体的形式存在，其中熔覆层中部奥氏体含量最高为60.7%，保证了熔覆层的综合性能;显微硬度随着熔覆层数的增加先上升后下降，但均高于母材;熔覆层竖直方向拉伸件的抗拉强度最低为723 MPa，断裂方式为准解理断裂，从宏观角度保证了所制备熔覆层的力学性能;对熔覆层进行点腐蚀浸泡和电化学腐蚀分析，从宏观角度与微观角度均验证了熔覆层的耐腐蚀性能。结论 基于各项检测结果，验证了用激光进行S32101双相不锈钢修复的可行性，为后续多层多道激光填丝熔覆奠定了基础。 |
| 英文摘要: |
| To carry out the basic experiment of laser single pass multilayer cladding for repairing the defects of duplex stainless steel thick plate in the new type nuclear power plant spent fuel pool. The ER-2209 welding wire was used to prepare the cladding layer on S32101 duplex stainless steel. The properties of the laser cladding layer on S32101 duplex stainless steel were studied by means of macro morphology, microstructure, mechanical testing and corrosion resistance testing. After several welding thermal cycles, the austenite structure in the cladding layer exists in the form of primary austenite and secondary austenite, and the highest austenite content in the middle of the cladding layer is 60.7%, which ensures the comprehensive properties of the cladding layer; The microhardness first increased and then decreased with the increase of cladding layers, but it was higher than the base metal; The tensile strength of the vertical tensile part of the cladding layer is at least 723 MPa, and the fracture mode is quasi cleavage fracture, which ensures the mechanical properties of the cladding layer from a macro perspective; The corrosion resistance of the cladding layer was verified from both macro and micro perspectives by spot corrosion immersion analysis and electrochemical corrosion analysis. Based on the test results, the feasibility of laser repair of S32101 duplex stainless steel is verified, which lays a foundation for the subsequent multi-layer and multi-channel laser cladding. |
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