Mechanical properties of heat resistant steel for main steam pipe of utility boiler after 6 years of service

2020 ◽  
Author(s):  
Facai Ren ◽  
Jinsha Xu ◽  
Zhiqiu Tu ◽  
Jun Si
Keyword(s):  
Mechanical Properties ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Utility Boiler ◽  
Heat Resistant ◽  
Steam Pipe ◽  
Years Of Service ◽  
Main Steam

Effect of Long-Term Ageing at 600 °C on Microstructure of ZG1Cr10MoWVNbN Martensitic Heat-Resistant Steel

2018 ◽  
Vol 37 (6) ◽  
pp. 539-544
Author(s):  
Chengzhi Zhao ◽  
Ning Li ◽  
Yihan Zhao ◽  
Hexin Zhang
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
M23c6 Carbide ◽  
Resistant Steel ◽  
Steam Turbines ◽  
Heat Resistant Steel ◽  
Property Variation ◽  
Heat Resistant ◽  
Before And After

AbstractA new kind of martensitic ZG1Cr10MoWVNbN heat-resistant steel has been attracted more attentions in recent years, which is mainly applied in ultra-supercritical steam turbines. The ageing property for ZG1Cr10MoWVNbN heat-resistant steel is very important because it often serves for long-time at high-temperature environment. Herein, a long-term ageing heat treatment was conducted on ZG1Cr10MoWVNbN steel at 600 °C heat for 17,000 hours. The microstructure evolution and property variation of the ZG1Cr10MoWVNbN steel were analysed before and after ageing, and also the effect of the precipitates on the mechanical properties was studied. The result showed that strength, the plastic index and impact power of the ZG1Cr10MoWVNbN steel were gradually decreased after long-term and high-temperature ageing at 600 °C due to the changes of martensite morphology and the coarsening of M23C6 carbide precipitation phase. Furthermore, fine precipitation of matrix MX carbide can also attribute to the change of mechanical properties at high temperature.

scholarly journals Effects of W on Mechanical Properties at Elevated Temperature of Weld Metal for 9Cr Ferritic Heat Resistant Steel.

1999 ◽  
Vol 17 (2) ◽  
pp. 266-278
Author(s):  
Hiroshi MORIMOTO ◽  
Hideo SAKURAI ◽  
Takashi TANAKA ◽  
Shigeru OHKITA ◽  
Masao FUJI
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Weld Metal ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant
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