某苯乙烯装置中Incoloy 800HT合金高温蒸汽管道主管对接接头开裂原因
Cracking Cause of Incoloy 800HT Alloy High-Temperature Steam Pipeline Butt Weld in Styrene Plant
摘 要
某苯乙烯装置中已使用13a的Incoloy 800HT合金高温蒸汽管道在定期检验过程中在主管对接接头处发现裂纹,通过拉伸试验、弯曲试验、金相检验和微观形貌观察等方法分析了裂纹产生的原因。结果表明:主管接头在913℃长时服役后在熔合线上有大量析出相,析出相主要是由合金元素铬和钼形成的碳化物;碳化物相的析出导致合金高温力学性能的降低并产生应力集中,蠕变孔洞在析出相附近产生,长时间高温使用下演变为蠕变裂纹。
熔合线
蠕变裂纹
析出相
Incoloy 800HT alloy
fusion line
creep crack
precipitated phase
Abstract
Cracks were found in the regular inspection of Incoloy 800HT alloy high temperature steam pipeline used for 13 a, and the causes of cracks were analyzed by tensile test, bending test, metallographic examination and micromorphology observation. The results show that the tensile and bending specimens both fractured on the weld fusion line. A large number of precipitated phases existed on the fusion line, and the precipitated phases were mainly carbides formed by alloying elements chromium and molybdenum. The phase led to the decrease of high temperature mechanical properties of the alloy and the generation of stress concentration. Creep holes were generated near the precipitated phase and evolved into creep cracks after long-term high temperature use.
中图分类号 TG172.6 DOI 10.11973/jxgccl202212016
所属栏目 失效分析
基金项目 国家市场监督管理总局科技计划项目(2021MK169)
收稿日期 2021/10/4
修改稿日期 2022/10/14
网络出版日期
作者单位点击查看
联系人作者李志峰高级工程师
备注陈刚(1970-),男,上海人,高级工程师,硕士
引用该论文: CHEN Gang,LI Zhifeng,LU Baoxi,YANG Lijun. Cracking Cause of Incoloy 800HT Alloy High-Temperature Steam Pipeline Butt Weld in Styrene Plant[J]. Materials for mechancial engineering, 2022, 46(12): 98～102
陈刚,李志峰,路宝玺,杨利军. 某苯乙烯装置中Incoloy 800HT合金高温蒸汽管道主管对接接头开裂原因[J]. 机械工程材料, 2022, 46(12): 98～102
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参考文献
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【3】刘青山,靳华锋.INCOLOY800HT铁镍基合金的焊接性能和焊接工艺研究[J].石油化工技术与经济,2019,35(6):45-48. LIU Q S,JIN H F.Research on welding properties and welding process of INCOLOY800HT iron-nickel based alloy[J].Technology ＆ Economics in Petrochemicals,2019,35(6):45-48.
【4】ROGALSKI G,LANDOWSKI M,et al.Mechanical and microstructural characterization of TIG welded dissimilar joints between 304L austenitic stainless steel and incoloy 800HT nickel alloy[J].Metals,2020,10(5):559-578.
【5】RAJU K,SUBBAIAH P K V.Optimization of operating parameters of TIG welding of Incoloy (800HT) through response surface methodology[J].International Journal of Innovative Technology and Exploring Engineering,2020,9(4):775-784.
【6】黄峰.Incoloy 800HT材料的焊接和热处理[J].石油化工建设,2010,32(4):32-34. HUANG F.Welding and Heat Treatment of Incoloy 800HT[J].Petroleum and Chemical Construction,2010,32(4):32-34.
【7】任海峰,王欢,马尚华,等.甲醇转化炉猪尾管破裂原因分析[J].石油化工设计,2016,33(2):15-17. REN H F,WANG H,MA S H,et al.Fracture analysis of Incoloy 800HT pigtails in methanol reformer[J].Petrochemical Design,2016,33(2):15-17.
【8】王伟明.顶烧式转化炉出口接管腐蚀开裂失效分析及建议[J].辽宁化工,2015,44(12):1513-1515. WANG W M.Failure analysis of the corrosion cracking of outlet tube in top-burning reforming furnace and suggestions[J].Liaoning Chemical Industry,2015,44(12):1513-1515.
【9】张玮,莫春鸿.奥氏体耐热钢SA-213TP310HCbN采用ERNiCr-3焊接接头性能试验及应用研究[J].电焊机,2019,49(8):72-75. ZHANG W,MO C H.Performance test and application of welded joint of welding austenitic heat-resistant steel SA-213TP310HCbN with ERNiCr-3[J].Electric Welding Machine,2019,49(8):72-75.
【10】张新,蔡文河,杜双明,等.Sanicro 25耐热钢的研究现状及应用前景[J].机械工程材料,2019,43(1):1-7. ZHANG X,CAI W H,DU S M,et al.Research situation and application prospect of Sanicro 25 heat-resistant steel[J].Materials for Mechanical Engineering,2019,43(1):1-7.
【11】NICOLINI G, MARTIN U, EL-MAGD E, et al.Evolution of the microstructure in alloy 800HT under high temperature creep load [J].Mat.-wiss. u. Werkstofftech,1998,29(9):30-38.
【12】高悦敏,杜好阳,叶丰,等.电站中超期服役10CrMo910钢的高温蠕变行为[J].机械工程材料,2022,46(4):69-74. GAO Y,M,DU H Y,YE F,et al.High temperature creep behavior of overage serviced 10CrMo910 steel for power station[J].Materials for Mechanical Engineering.2022,46(4):69-74.
【13】EL-MAGD E, NICOLINI G, FARAG M. Effect of carbide precipitation on the creep behavior of alloy 800HT in the temperature range 700℃ to 900℃[J].Metallurgical and Materials Transactions A,1996,27(3):747-756.
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