核电双相不锈钢S32101焊接工艺研究
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摘要
双相不锈钢的金相组织是铁素体与奥氏体,具有碳钢和奥氏体不锈钢的综合性能,尤其是耐海水腐蚀性能优越,且采用Mn、N代镍,降低造价。由于不良的热成形性能,双相不锈钢在以往核电建设方面仅用于仪表小管。在AP1000核电中,S32101双相不锈钢大量用于结构模块,主要性能是结构强度(常温与高温)和耐腐蚀性。结构模块制造、安装过程中的焊接工艺是保证模块整体性能的特殊工艺。双相不锈钢S32101的焊条电弧焊,需要掌握不同焊接线能量对的熔敷金属性能的影响,得出最佳的焊接工艺规范。
The microstructure of the duplex stainless steel is the ferrite and austenite with the comprehensive properties of carbon steel and austenitic stainless steel, especially the superior corrosion resistance of sea water. Mn and N are adopted instead of nickel to reduce the cost. Due to the poor thermal formability, the duplex stainless steel is used only for instrument tubes in former nuclear power construction. In AP1000 nuclear power plant, the duplex stainless steel S32101 is widely used in structural modules for the structural strength(ambient temperature and high temperature) and corrosion resistance. The welding process during the fabrication and installation of the structural modules is a special process to ensure the performance of the modules. The electrode arc welding of the duplex stainless steel S32101, requires to get knowledge about the influence of different welding line energy on the properties of deposited metals, and to obtain the optimum welding procedure specifications.
The microstructure of the duplex stainless steel is the ferrite and austenite with the comprehensive properties of carbon steel and austenitic stainless steel, especially the superior corrosion resistance of sea water. Mn and N are adopted instead of nickel to reduce the cost. Due to the poor thermal formability, the duplex stainless steel is used only for instrument tubes in former nuclear power construction. In AP1000 nuclear power plant, the duplex stainless steel S32101 is widely used in structural modules for the structural strength(ambient temperature and high temperature) and corrosion resistance. The welding process during the fabrication and installation of the structural modules is a special process to ensure the performance of the modules. The electrode arc welding of the duplex stainless steel S32101, requires to get knowledge about the influence of different welding line energy on the properties of deposited metals, and to obtain the optimum welding procedure specifications.
引文
[1]李俊.双相不锈钢S32101生产工艺研究[J].山西冶金,2013(146).
[2]李庆光.S32101双相不锈钢的焊接特性及在AP1000核电站中的应用[J].电力建设,2013.
[3]孙汉虹.第三代核电技术AP1000[M].北京:中国电力出版社,2010.
[4]吴玖.双相不锈钢[M].北京:冶金工业出版社,2000.
[2]李庆光.S32101双相不锈钢的焊接特性及在AP1000核电站中的应用[J].电力建设,2013.
[3]孙汉虹.第三代核电技术AP1000[M].北京:中国电力出版社,2010.
[4]吴玖.双相不锈钢[M].北京:冶金工业出版社,2000.