12Cr1MoV厚壁钢管焊缝内部裂纹处理实例
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摘要
12Cr1MoV是目前电站锅炉用量最大的低合金耐热钢,经国内外实践证明其工艺性能良好,可靠性强,其广泛应用在锅炉过热管、联箱和管道中。以某电厂#4机亚临界锅炉为例,针对后屏集箱至高温过热器联箱连接管的内部裂纹进行分析,并提出相应的处理解决方案,为目前国内在役最多的300 MW机组中的12Cr1Mo V厚壁钢管技术管理提供了有益借鉴,为机组安全经济运行提供了重要保障。
12Cr1MoV is the most commonly used low-alloy heatresistant steel in electric furnace and its high process performance and reliability has been widely proved. It is commonly applied in making superheater tubers,headers,and pipes a boiler.In this paper,the subcritical boiler is used as an example,and the analysis is focused on the cracks inside the connection pipes between the header and superheater. The solutions provide important experience and guarantees for the 12Cr1MoV steel pipes applied in most of the 300 MW units with the largest number in service.
12Cr1MoV is the most commonly used low-alloy heatresistant steel in electric furnace and its high process performance and reliability has been widely proved. It is commonly applied in making superheater tubers,headers,and pipes a boiler.In this paper,the subcritical boiler is used as an example,and the analysis is focused on the cracks inside the connection pipes between the header and superheater. The solutions provide important experience and guarantees for the 12Cr1MoV steel pipes applied in most of the 300 MW units with the largest number in service.
引文
[1]曹德辉,杨锦辉,祝国胜.12Cr1Mo VG集箱三通厚壁管焊接裂纹的补焊工艺[C]//电力行业电力锅炉压力容器安全监督管理委员会.超(超)临界锅炉用钢及焊接技术协作网第四次论坛大会论文集,2011.
[2]韩利东.厚壁12Cr1Mo VG管道在低温环境下的焊接[J].电焊机,2008,38(2):69-70.
[3]郭元蓉,吴红,陈雨,等.厚壁12Cr1Mo VG的热处理工艺优化[J].钢管,2008,37(5):15-19.
[4]火力发电厂焊接技术规程:DL/T 869—2012[S].
[5]火力发电厂金属技术监督规程:DL/T 438—2016[S].
[2]韩利东.厚壁12Cr1Mo VG管道在低温环境下的焊接[J].电焊机,2008,38(2):69-70.
[3]郭元蓉,吴红,陈雨,等.厚壁12Cr1Mo VG的热处理工艺优化[J].钢管,2008,37(5):15-19.
[4]火力发电厂焊接技术规程:DL/T 869—2012[S].
[5]火力发电厂金属技术监督规程:DL/T 438—2016[S].