服役时间对1Cr5Mo钢制高温紧固螺母显微组织和力学性能的影响
Effect of Service Time on Microstructure and Mechanical Properties of High Temperature 1Cr5Mo Steel Fastening Nut
摘 要
针对某火电厂超临界机组汽轮机1Cr5Mo钢制紧固螺母服役后硬度大幅下降现象，在566 ℃下对1Cr5Mo钢制螺母进行时效试验（等效于服役），研究了时效时间对显微组织和力学性能的影响，并与566 ℃下服役约105 h螺母的组织和性能进行了对比。结果表明：在不高于566 ℃的条件下，1Cr5Mo钢制螺母显微组织转变缓慢，时效2 880 h时的显微组织仍为马氏体和碳化物，但服役105 h时组织转变为回火索氏体；随着时效/服役时间的延长，碳化物由晶内向晶界处迁移富集，并发生明显粗化。组织的劣化导致螺母硬度、强度和冲击功降低。
1Cr5Mo钢
碳化物
马氏体
固溶强化
high temperature nut
1Cr5Mo steel
carbide
martensite
solution strengthening
Abstract
The hardness of the 1Cr5Mo steel fastening nut of a supercritical unit steam turbine in a thermal power plant was reduced significantly after service. Aiming at this phenomenon, the aging tests (equivalent to service) of the 1Cr5Mo steel nut were carried out at 566 ℃. The effect of aging time on the microstructure and mechanical properties was studied, and the microstructure and performance were compared with those of the nut served at 566 ℃ for 105 h. The results show that at temperatures not higher than 566 ℃, the microstructure of the 1Cr5Mo steel nut changed slowly; the microstructure was still martensite and carbide after aging for 2 880 h. But the microstructure changed to tempered sorbite after service for 105 h. With the extension of the aging/service time, the carbides migrated and concentrated from the inside grain to the grain boundary, and became obviously coarsened. The deterioration of the structure led to the reduction of the hardness, strength, and impact energy of the nut.
中图分类号 TM621 DOI 10.11973/jxgccl202102011
所属栏目 材料性能及应用
基金项目
收稿日期 2020/3/9
修改稿日期 2020/11/10
网络出版日期
作者单位点击查看
备注张腾雨(1994-),男,河南周口人,硕士研究生
引用该论文: ZHANG Tengyu,HAN Tao,WU Shuquan,JIANG Feng,ZHANG Zhibo,JIANG Shikai. Effect of Service Time on Microstructure and Mechanical Properties of High Temperature 1Cr5Mo Steel Fastening Nut[J]. Materials for mechancial engineering, 2021, 45(2): 61～65
张腾雨,韩涛,吴术全,江峰,张志博,姜世凯. 服役时间对1Cr5Mo钢制高温紧固螺母显微组织和力学性能的影响[J]. 机械工程材料, 2021, 45(2): 61～65
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】陈彤,蔡传荣,林文龙.火电厂用螺栓紧固件的失效分析与防范措施[J].福建分析测试,1999,8(1):1019-1021. CHEN T, CAI C R, LIN W L. Failure analysis and preventive measures of bolt fasteners for thermal power plant[J]. Fujian Analysis & Testing, 1999, 8(1):1019-1021.
【2】刘堂礼.超临界和超超临界技术及其发展[J].广东电力,2007,20(1):19-22. LIU T L. Supercritical and ultra supercritical technique and development thereof[J]. Guangdong Electric Power, 2007, 20(1):19-22.
【3】乔立捷.汽轮机螺栓的材料特性与失效研究[D].北京:华北电力大学,2009. QIAO L J. A study on turbine bolt material characteristic and failure[D]. Beijing:North China Electric Power University, 2009.
【4】姜涛,王建光,张志博,等.超超临界机组镍基螺栓断裂失效分析[J].热力发电,2016,45(1):93-98. JIANG T, WANG J G, ZHANG Z B, et al. Fracture failure analysis of Ni-based bolts for ultra-supercritical units[J]. Thermal Power Generation, 2016, 45(1):93-98.
【5】陈嵩. 1Cr5Mo钢高温应力腐蚀及防护方法的研究现状[J].热加工工艺,2013,42(12):29-31. CHEN S. Research status of high temperature stress corrosion and protective methods for 1Cr5Mo steel[J]. Hot Working Technology, 2013, 42(12):29-31.
【6】石晓霞,郭兆成,乔爱云.1Cr5Mo合金钢管热处理工艺研究[J].包钢科技,2010,36(5):13-15. SHI X X, GUO Z C, QIAO A Y. Research on heat treatment technology for 1Cr5Mo alloy steel pipes[J]. Science and Technology of Baotou Steel, 2010, 36(5):13-15.
【7】MARUYAMA K,SAWADA K, KOIKE J I. Strengthening mechanisms of creep resistant tempered martensitic steel[J]. ISIJ International, 2001, 41(6):641-653.
【8】石如星,刘正东.P92钢中Laves相强化作用的研究[J].物理测试,2011,29(4):5-9. SHI R X, LIU Z D. Study on strengthening behavior of laves phase in P92 heat-resistant steel[J]. Physics Examination and Testing, 2011, 29(4):5-9.
【9】YANO Y, TANNO T,SEKIO Y, et al. Tensile properties and hardness of two types of 11Cr-ferritic/martensitic steel after aging up to 45000 h[J]. Nuclear Materials and Energy, 2016, 9:324-330.
【10】胡正飞.马氏体耐热钢的应用研究与评价[M].北京:科学出版社,2018:96-125. HU Z F. Application research and evaluation of martensitic heat resistant steel[M]. Beijing:Science Press,2018:96-125.
【11】PANAIT C G, ZIELI AN'G SKA-LIPIEC A, KOZIEL T, et al. Evolution of dislocation density, size of subgrains and MX-type precipitates in a P91 steel during creep and during thermal ageing at 600℃ for more than 100000 h[J]. Materials Science and Engineering:A, 2010, 527(16/17):4062-4069.
【12】NIE M,ZHANG J, HUANG F, et al. Microstructure evolution and life assessment of T92 steel during long-term creep[J]. Journal of Alloys and Compounds, 2014, 588:348-356.
【13】黄金督,梅建平,晏井利,等.T91钢时效过程中的组织老化和性能变化[J].金属热处理,2016,41(11):45-49. HUANG J D, MEI J P, YAN J L, et al. Microstructure degradation and properties evolution of T91 steel during aging[J]. Heat Treatment of Metals, 2016, 41(11):45-49.
【2】刘堂礼.超临界和超超临界技术及其发展[J].广东电力,2007,20(1):19-22. LIU T L. Supercritical and ultra supercritical technique and development thereof[J]. Guangdong Electric Power, 2007, 20(1):19-22.
【3】乔立捷.汽轮机螺栓的材料特性与失效研究[D].北京:华北电力大学,2009. QIAO L J. A study on turbine bolt material characteristic and failure[D]. Beijing:North China Electric Power University, 2009.
【4】姜涛,王建光,张志博,等.超超临界机组镍基螺栓断裂失效分析[J].热力发电,2016,45(1):93-98. JIANG T, WANG J G, ZHANG Z B, et al. Fracture failure analysis of Ni-based bolts for ultra-supercritical units[J]. Thermal Power Generation, 2016, 45(1):93-98.
【5】陈嵩. 1Cr5Mo钢高温应力腐蚀及防护方法的研究现状[J].热加工工艺,2013,42(12):29-31. CHEN S. Research status of high temperature stress corrosion and protective methods for 1Cr5Mo steel[J]. Hot Working Technology, 2013, 42(12):29-31.
【6】石晓霞,郭兆成,乔爱云.1Cr5Mo合金钢管热处理工艺研究[J].包钢科技,2010,36(5):13-15. SHI X X, GUO Z C, QIAO A Y. Research on heat treatment technology for 1Cr5Mo alloy steel pipes[J]. Science and Technology of Baotou Steel, 2010, 36(5):13-15.
【7】MARUYAMA K,SAWADA K, KOIKE J I. Strengthening mechanisms of creep resistant tempered martensitic steel[J]. ISIJ International, 2001, 41(6):641-653.
【8】石如星,刘正东.P92钢中Laves相强化作用的研究[J].物理测试,2011,29(4):5-9. SHI R X, LIU Z D. Study on strengthening behavior of laves phase in P92 heat-resistant steel[J]. Physics Examination and Testing, 2011, 29(4):5-9.
【9】YANO Y, TANNO T,SEKIO Y, et al. Tensile properties and hardness of two types of 11Cr-ferritic/martensitic steel after aging up to 45000 h[J]. Nuclear Materials and Energy, 2016, 9:324-330.
【10】胡正飞.马氏体耐热钢的应用研究与评价[M].北京:科学出版社,2018:96-125. HU Z F. Application research and evaluation of martensitic heat resistant steel[M]. Beijing:Science Press,2018:96-125.
【11】PANAIT C G, ZIELI AN'G SKA-LIPIEC A, KOZIEL T, et al. Evolution of dislocation density, size of subgrains and MX-type precipitates in a P91 steel during creep and during thermal ageing at 600℃ for more than 100000 h[J]. Materials Science and Engineering:A, 2010, 527(16/17):4062-4069.
【12】NIE M,ZHANG J, HUANG F, et al. Microstructure evolution and life assessment of T92 steel during long-term creep[J]. Journal of Alloys and Compounds, 2014, 588:348-356.
【13】黄金督,梅建平,晏井利,等.T91钢时效过程中的组织老化和性能变化[J].金属热处理,2016,41(11):45-49. HUANG J D, MEI J P, YAN J L, et al. Microstructure degradation and properties evolution of T91 steel during aging[J]. Heat Treatment of Metals, 2016, 41(11):45-49.
相关信息
