A solution to the Embrittlement after Aging of HR3C

Authors

  • Weidong Yan
  • Hongwei Yan
  • Wenli Xia
  • Yansen Zhang
  • Yakai Zhang

DOI:

https://doi.org/10.54097/4667dy97

Keywords:

HR3C, embrittlement after aging, oxidation resistance, shot.

Abstract

HR3C steel was widely used in superheaters and Reheaters of Million Power Unit because of its good anti-oxidation and corrosion performance and high endurance strength. With the increase of service time, HR3C steel showed obvious aging embrittlement, that is, in the early stage of service, the elongation at room temperature decreased to less than 10%, which posed a threat to the safe operation of units. Although the durable strength of S30432 steel was higher than that of HR3C steel at 600 ℃ ~700 ℃, the anti-oxidation and corrosion performance of S30432 steel was lower than that of HR3C steel because of the less Cr content of S30432 steel, which limited the application of S30432 steel. The research on the anti-oxidation and corrosion performance of S30432 steel was analyzed. The results showed that after surface modification such as shot peening and aluminizing, the anti-oxidation performance of S30432 steel was equivalent to that of HR3C steel. The plastic decline of S30432 steel after aging was analyzed. The results showed that the plasticity of S30432 steel would also decline in the early service, but the aging embrittlement was not obvious. Based on the above analysis, a method of replacing HR3C steel with surface modified S30432 steel was proposed to solve the aging embrittlement problem of HR3C steel.

Downloads

Download data is not yet available.

References

[1] T.J. Li, F.G. Liu, C.X. Fan, et al. Study on aging embrittlement of new type austenitic heat resistant steel HR3C used in USC boiler[J]. Hot Working Technology, 39 (2010) 43-46.

[2] Z. Yin, H. Cai, H.G. Liu. Performance on new heat-resistant steel HR3C in the ultra-supercritical units after service at high temperature for 25000 hours. Proceedings of the CSEE, 31 (2011) 103-109.

[3] Q. Shen, H.G. Liu, L.Y. Tang. Study on operation 5400h performance test of esc unit stainless steel Super304H and HR3C[J]. Electric Power Construction, 30 (2009) 62-66.

[4] J.R. Hu, J.Y. Chen, H.D, Chen, X.W. Yang and S.Z. Mou, Study on microstructure and mechanical properties of HR3C before and after operation. Mining and Metallurgical Engineering, 32 (2012) 110-112.

[5] X.M. Li , Z.W. Zhang, B.S. Du and X.Y. Peng. Microstructure and impact toughness of HR3C steel after aging at 600℃[J]. Materials for Mechanical Engineering, 38 (2014) 95-98.

[6] Z.J. Zheng. The analysis of considerably reduction to HR3C’s aging impact ductility[J]. Boiler Technology, 42 (2011) 46-48.

[7] X.R. Yang, G.Y. Ju,L. Song,W.S. Liu and H. Deng. Creep rupture life of embrittled HR3C steel after service for 50 000h[J]. Heat Treat., 45 (2020) 243-247.

[8] Z.W. Wang, J. Tian, D.L. Fan, Z. Jiang. Microstructure and properties of HR3C steel after service for 50000 h[J]. Heat Treat., 42 (2017) 1-6.

[9] Z.F. Peng, W. Ren, C. Yang, F.Y. Chen, H.G. Liu, F.F. Peng and Q.S. Mei. Relationship between the evolution of phase parameters of grain boundary M23C6 and embrittlement of HR3C super-heater tubes in service[J]. ACTA METALL SIN-ENGL, 51 (2015) 1325-1332.

[10] Y.M. Li, C.X. Fan, B.X. Yang and Z.G. Shi. New heat resistant steel for large thermal power unit[M]. Beijing:China Electric Power Press, 12 2013.

[11] GB/T5310-2017, Seamless steel tubes and pipes for high pressure boiler[S].

[12] H.Y. Yu, C.Y. Chi, J.X. Dong, X.S. Xie, Z.Q. Cui and X.F. Chen. Microstructural evolution of heat-resistant steel Super304H during 650℃ long term aging[J]. Journal of University of Science and Technology Beijing, 32 (2010) 877-882.

[13] X. Tian, C.P. Qin, H. Xu, Y.M. Li, B.X. Yang and G.H. Xiao. Properties and microstructure evolution of domestic Super304H steel during high temperature creep rupture testing[J]. Electr. Power, 48 (2015) 49-55.

[14] J.D. Pan. Studies on high-temperature aging of the Super304H and HR3C heat resistant steels[D]. Hefei University of Technology, 2013.

[15] L. Zhao, X.P. Dong, F. Sun, L.T. Zhang, A.D. Shan and H.G. Liu. Microstructure and mechanical properties of Super304H ultra supercritical pressure boiler superheater tube after serving for a long time[J]. Materials for mechancial engineering, 2013, 37(7): 28~32.

[16] A. Li. Study on fireside corrosion of Ultra Supercritical(USC) Steel[D]. Dalian University of Technology, 2013.

[17] Y.K. Wang, G.M. Liu, C. Zhao, M.Q. Zhang, H.J. Liu, L.Q. Huang and X.F. Mao. High temperature corrosion behavior of S30432 and HR3C coated with power plant coal ash and synthetic coal ash[J]. Surface of Technology, ,48 (2019) 365-371+380.

[18] S.Q. Xu, Zang, et al. Research on the inwall shot blasting of the S30432 high-pressure boiler tube[J]. Baosteel Technical Research, 2012.

[19] Z.W. Yue, X.G. Li. Research and application of shot peening on oxidation resistance of austenitic steels in steam[J]. Transactions of Materials and Heat Treatment, ,34 (2013) 157-162.

[20] H.C. Zhao, L.Y. Tang, J.M. Jia, B. Sun, C.X. Wang and J.G. Chen. Influences of shot blasting on steam oxidation resistance of S30432 boiler tubes. Electric Power, 47 (2014) 9-13+21.

[21] Z.C. Wang, W.H. Cai, Z.W. Han, J.G. Wang, S.Q. Dong and N. Jiang. Effects of shot peening on oxidation behavior of S30432 steel in steam at 650℃[J]. Surface of Technology, 47 (2018) 42-47.

[22] L.F. Ge, P.F. Feng, X.D. Lii, X. Sui, L. Shao, H.H. Liu, X.L. Zhang. Comparative study on steam oxidation resistance of shot peened and non-shot peened S30432 steel[J]. Power Equipment, ,35 (2021) 344-348.

[23] S.E. Yang, H.C. Yang and S.B. Liu. Influence of shot peening on steam oxidation resistance of 18-8 type austenitic heat-resistant steels[J]. Power Equipment, ,33 (2019) 189-192.

[24] Z.M. Wang, G.M. Liu, W U Shi-Qiang, et al. Effect of heat treatment on high temperature steam oxidation resistance of shot blasted S30432 stainless steel[J]. Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment, 40 (2019) 124-132.

[25] L. Liu, S. Wang, J. Sun, et al. Effect of heating temperature on shot blasting layer of S30432 austenite stainless steel tube[J]. Jinshu Rechuli/ Heat Treat., , 43 (2018) 227-230.

[26] Z. Yang, J.T. Lu, P. Zhang, Y.L. Zhou, J.Y. Huang, Y.Y. Dang, Y. Yuan and Y.F. Gu. Microstructure and steam oxidation performance of the aluminium diffusion coating on Super304H Steel[J]. Surface of Technology,2020,49(01):64-71.

[27] M. Le, H.Z. Wang, Z.S. Yu, J.T. Lu. Influence of surface modification on steam oxidation of Super304H at 650℃. Thermal Power Generation, 45 (2016) 42-47.

Downloads

Published

27-09-2024

How to Cite

Yan, W., Yan, H., Xia , W., Zhang, Y., & Zhang, Y. (2024). A solution to the Embrittlement after Aging of HR3C. Highlights in Science, Engineering and Technology, 117, 63-69. https://doi.org/10.54097/4667dy97