1 000 MW超超临界机组电动闸阀阀杆的断裂原因
Fracture Cause of Electric Gate Valve Stem in a 1 000 MW Ultra-Supercritical Unit
摘 要
某1 000 MW超超临界机组给水泵出口电动闸阀阀杆在阀门开启过程中发生断裂，采用宏观形貌观察、化学成分分析、力学性能测试和显微组织观察等方法分析了阀杆断裂的原因。结果表明：阀杆的显微组织不均匀，心部存在局部疏松，组织中存在较多条状或块状铁素体，导致阀杆的塑韧性不足，综合力学性能不均匀；同时在阀门打开过程中，出口侧阀瓣与滑轨之间发生严重卡涩，且阀杆环形平台的加工质量较差，阀杆底部环形平台变截面根部过渡圆弧角较小。在阀门开启时，裂纹在环形平台变截面根部的应力集中区域萌生并快速扩展，最终导致阀杆发生脆性断裂。
X39CrMo17-1不锈钢
脆性断裂
应力集中
铁素体
stem
X39CrMo17-1 stainless steel
brittle fracture
stress concentration
ferrite
Abstract
A electric gate valve stem at the outlet of feedwater pump in a 1 000 MW ultra-supercritical unit fractured during valve opening. The fracture cause of the stem was analyzed by macromorpholgy observation, chemical composition analysis, mechanical performance test and microstructure observation. The results show that the microstructure of the stem was nonuniform, and there was local porosity in the center area. A lot of striped or massive ferrite existed in the microstructure resulting in insufficient plasticity and uneven comprehensive mechanical properties of the stem. The serious jam occurred between the valve disc and the slide rail on the outlet side during valve opening. The machining quality of the annular platform surface of the stem was poor, and the transition arc angle of the variable section root of the annular platform at the bottom of the stem was small. The cracks initiated at the stress concentration area of the variable cross-section root of the annular platform when opening the valve, and then expanded quickly, resulting in the brittle fracture of the stem finally.
中图分类号 TH134 DOI 10.11973/jxgccl202107019
所属栏目 失效分析
基金项目
收稿日期 2020/6/16
修改稿日期 2021/5/12
网络出版日期
作者单位点击查看
备注彭波(1992-),男,湖南常德人,工程师,硕士
引用该论文: PENG Bo,WANG Jianguo,PEI Guanghui,XIN Linxiang,WANG Zhichun. Fracture Cause of Electric Gate Valve Stem in a 1 000 MW Ultra-Supercritical Unit[J]. Materials for mechancial engineering, 2021, 45(7): 104～110
彭波,王建国,裴广会,辛林祥,王智春. 1 000 MW超超临界机组电动闸阀阀杆的断裂原因[J]. 机械工程材料, 2021, 45(7): 104～110
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】张燕侠.热力发电厂[M].北京:中国电力出版社,2006. ZHANG Y X.Thermal power plant[M].Beijing:China Electric Power Press,2006.
【2】广东电网公司电力科学研究院.锅炉设备及系统[M].北京:中国电力出版社,2011. Power Research Institute of Guangdong Power Grid Corporation. Boiler equipment and systems[M].Beijing:China Electric Power Press,2011.
【3】黄维浩,任晓,何龙.热处理工艺对马氏体不锈钢X39CrMo17-1组织和性能影响的研究[J].动力工程学报,2016,36(7):583-588. HUANG W H,REN X,HE L.Effect of heat treatment process on microstructure and properties of martensite stainless steel X39CrMo17-1[J].Journal of Chinese Society of Power Engineering,2016,36(7):583-588.
【4】赵亮,马党参,刘建华,等.淬回火工艺对马氏体不锈钢3Cr17Mo组织和力学性能的影响[J].特殊钢,2006,27(2):58-60. ZHAO L,MA D S,LIU J H,et al.Effect of quenching-tempering process on structure and mechanical properties of martensite stainless steel 3Cr17Mo[J].Special Steel,2006,27(2):58-60.
【5】BRNIC J, TURKALJ G, LANC D, et al.Testing and analysis of X39CrMo17-1 steel properties[J].Construction and Building Materials,2013, 44:293-301
【6】王永梅.X39CrMo17-1轴断裂失效分析[J].有色金属文摘,2015(5):84-85. WANG Y M.Fracture failure analysis of X39CrMo17-1 shaft[J].Nonferrous Metals Abstract,2015(5):84-85.
【7】张学星,蔡文河,张新,等.超超临界机组汽轮机X39CrMo17-1不锈钢阀杆断裂失效分析[J].金属热处理,2019,44(3):231-237. ZHANG X X,CAI W H,ZHANG X,et al.Fracture failure analysis of X39CrMo17-1 steel valve stem for ultra-supercritical steam turbine[J].Heat Treatment of Metals,2019,44(3):231-237.
【8】钟群鹏,周煜,张峥.裂纹学[M].北京:高等教育出版社,2014. ZHONG Q P,ZHOU Y,ZHANG Z.Study of cracks[M].Beijing:Higher Education Press,2014.
【9】李彦林,朱敏,聂常贵.热电厂汽轮发电机组高压阀杆断裂失效分析[C]//第三届十省区市机械工程学会科技论坛暨黑龙江省机械工程学会2007年年会集.哈尔滨:机械工程师杂志编辑部,2007:637-641. LI Y L, ZHU M, NIE C G. Fracture failure analysis of high pressure valve stem of steam turbine generator set in thermal power plant[C]//The 3rd Science and Technology Forum of Ten Provinces, Regions and Municipalities Mechanical Engineering Society and Heilongjiang Mechanical Engineering Society Annual Meeting in 2007. Harbin:Editorial Department of the Journal of Mechanical Engineers, 2007:637-641.
【10】王志武,费勤楠,梅伟,等.300 MW汽轮机高压主汽阀阀杆断裂原因分析[J].金属热处理,2011,36(8):21-24. WANG Z W,FEI Q N,MEI W,et al.Fracture analysis of high pressure main steam valve stem of a 300 MW steam turbine[J].Heat Treatment of Metals,2011,36(8):21-24.
【11】马小明,黄志华.聚丙烯挤出机螺杆轴断裂失效分析[J].机械工程材料,2014,38(10):97-100. MA X M,HUANG Z H.Fracture failure analysis of screw shaft of a polypropylene extruder[J].Materials for Mechanical Engineering,2014,38(10):97-100.
【2】广东电网公司电力科学研究院.锅炉设备及系统[M].北京:中国电力出版社,2011. Power Research Institute of Guangdong Power Grid Corporation. Boiler equipment and systems[M].Beijing:China Electric Power Press,2011.
【3】黄维浩,任晓,何龙.热处理工艺对马氏体不锈钢X39CrMo17-1组织和性能影响的研究[J].动力工程学报,2016,36(7):583-588. HUANG W H,REN X,HE L.Effect of heat treatment process on microstructure and properties of martensite stainless steel X39CrMo17-1[J].Journal of Chinese Society of Power Engineering,2016,36(7):583-588.
【4】赵亮,马党参,刘建华,等.淬回火工艺对马氏体不锈钢3Cr17Mo组织和力学性能的影响[J].特殊钢,2006,27(2):58-60. ZHAO L,MA D S,LIU J H,et al.Effect of quenching-tempering process on structure and mechanical properties of martensite stainless steel 3Cr17Mo[J].Special Steel,2006,27(2):58-60.
【5】BRNIC J, TURKALJ G, LANC D, et al.Testing and analysis of X39CrMo17-1 steel properties[J].Construction and Building Materials,2013, 44:293-301
【6】王永梅.X39CrMo17-1轴断裂失效分析[J].有色金属文摘,2015(5):84-85. WANG Y M.Fracture failure analysis of X39CrMo17-1 shaft[J].Nonferrous Metals Abstract,2015(5):84-85.
【7】张学星,蔡文河,张新,等.超超临界机组汽轮机X39CrMo17-1不锈钢阀杆断裂失效分析[J].金属热处理,2019,44(3):231-237. ZHANG X X,CAI W H,ZHANG X,et al.Fracture failure analysis of X39CrMo17-1 steel valve stem for ultra-supercritical steam turbine[J].Heat Treatment of Metals,2019,44(3):231-237.
【8】钟群鹏,周煜,张峥.裂纹学[M].北京:高等教育出版社,2014. ZHONG Q P,ZHOU Y,ZHANG Z.Study of cracks[M].Beijing:Higher Education Press,2014.
【9】李彦林,朱敏,聂常贵.热电厂汽轮发电机组高压阀杆断裂失效分析[C]//第三届十省区市机械工程学会科技论坛暨黑龙江省机械工程学会2007年年会集.哈尔滨:机械工程师杂志编辑部,2007:637-641. LI Y L, ZHU M, NIE C G. Fracture failure analysis of high pressure valve stem of steam turbine generator set in thermal power plant[C]//The 3rd Science and Technology Forum of Ten Provinces, Regions and Municipalities Mechanical Engineering Society and Heilongjiang Mechanical Engineering Society Annual Meeting in 2007. Harbin:Editorial Department of the Journal of Mechanical Engineers, 2007:637-641.
【10】王志武,费勤楠,梅伟,等.300 MW汽轮机高压主汽阀阀杆断裂原因分析[J].金属热处理,2011,36(8):21-24. WANG Z W,FEI Q N,MEI W,et al.Fracture analysis of high pressure main steam valve stem of a 300 MW steam turbine[J].Heat Treatment of Metals,2011,36(8):21-24.
【11】马小明,黄志华.聚丙烯挤出机螺杆轴断裂失效分析[J].机械工程材料,2014,38(10):97-100. MA X M,HUANG Z H.Fracture failure analysis of screw shaft of a polypropylene extruder[J].Materials for Mechanical Engineering,2014,38(10):97-100.
相关信息
