Microstructure and Mechanical Properties of Burst Tube of Superheater of 12Cr1MoV Steel
摘 要
以电站锅炉12Cr1MoV钢高温过热器爆管为研究对象,通过宏观观察、金相检验、硬度测试、化学成分分析等方法分析了爆管背烟侧及迎烟侧管材的显微组织及力学性能差异。结果表明:该过热器管材有明显劣化现象,爆管背烟侧和迎烟侧显微组织和力学性能存在明显差异;爆管迎烟侧组织老化现象较为严重,珠光体呈4.5级球化,常温拉伸性能和硬度明显低于背烟侧的,表明炉内长期高温烟气冲刷对高温过热器管迎烟侧材质劣化影响更为明显。
Abstract
Burst tube of high temperature superheater of 12Cr1MoV steel in station boiler was studied. The difference of microstructure and mechanical properties between back and fire side of burst tube of superheater were analyzed by macroscopic obsewation, metallographic examination, hardness test and chemical composition analysis. The results show that the high temperature superheater tubes have obvious deterioration, and there were obvious differences in microstructure and mechanical properties between back and fire side of burst tube of superheater. The deterioration phenomenon of the pipe at the fire side was more serious, and the pearlite is 4.5 grade spheroidizing. The tensile and hardness indexes at room temperature are significantly lower than back side, indicating that the long term high temperature flue gas scour in the furnace has a more significant effect on the deterioration of the fire side to the high temperature superheater tube.
中图分类号 TK223.3 DOI 10.11973/lhjy-wl201803004
所属栏目 试验与研究
基金项目
收稿日期 2017/8/8
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备注谷树超(1985-),男,工程师,主要从事电站锅炉及管道部件失效分析等工作,gushuchao@126.com
引用该论文: GU Shuchao,WANG Song,LI Jun,ZHAO Dongjian. Microstructure and Mechanical Properties of Burst Tube of Superheater of 12Cr1MoV Steel[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2018, 54(3): 169~174
谷树超,王松,李俊,赵冬建. 12Cr1MoV钢过热器爆管的显微组织和力学性能[J]. 理化检验-物理分册, 2018, 54(3): 169~174
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参考文献
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【2】梁秀兰,有移亮,张峥. 12Cr1MoV锅炉过热器管长期过热开裂原因分析[J]. 机械工程学报,2014,50(8):81-86.
【3】PURBOLAKSONO J,AHMAD J,BENG L C,et al. Failure analysis on primary superheater tube of power plant[J]. Engineering Failure Analysis,2010,17(1):158-167.
【4】卢书媛,王卫忠,俞璐,等. 锅炉过热器管爆裂原因分析[J]. 理化检验(物理分册),2016,52(11):807-810.
【5】晏嘉陵. 600 MW超临界电站锅炉末级过热器管爆裂失效分析[J]. 理化检验(物理分册),2017,53(6):445-448.
【6】高宏波,谢守明,赵杰,等. 12Cr1MoV钢转变与剩余寿命预测[J]. 材料工程,2005,7(3):40-42.
【7】史宝良,李鹏飞,任爱,等. 12Cr1MoV后屏过热器爆管失效分析[J]. 金属热处理,2015,40(z1):254-259.
【8】殷立宝,马仑,张成,等. 超临界对冲燃锅炉水冷壁向火侧起皮成因分析[J]. 动力工程学报,2015,35(4):257-262.
【9】徐婷婷. 氧化层厚度对高温受热面温度和应力分布影响的研究[D]. 北京:华北电力大学,2011.
【10】江范清,胡文龙,奚杰峰. 600 MW锅炉12Cr1MoV末级再热器管失效原因分析[J]. 热加工工艺,2016,45(4):255-257.
【11】潘红涛. 12Cr1MoV钢高温过热器管爆裂分析[J]. 理化检验(物理分册),2014,50(11):842-844.
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