Effect of high temperature aging on microstructure and mechanical properties of HR3C heat resistant steel

2013 ◽  
Vol 30 (2) ◽  
pp. 205-210 ◽  
Author(s):  
X. Bai ◽  
J. Pan ◽  
G. Chen ◽  
J. Liu ◽  
J. Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Microstructure And Mechanical Properties ◽  
High Temperature Aging ◽  
Temperature Aging

scholarly journals Effect of carbides on high-temperature aging embrittlement in 12%Cr martensitic heat-resistant steel

2019 ◽  
Vol 8 (6) ◽  
pp. 5833-5846 ◽  
Author(s):  
Junru Li ◽  
Pengfei Zhang ◽  
Tian He ◽  
Lianjun Cheng ◽  
Liwei Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
High Temperature Aging ◽  
Temperature Aging

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.

Investigation on the Microstructure and Mechanical Properties of T23 Steel during High Temperature Aging

2020 ◽  
Vol 993 ◽  
pp. 575-584
Author(s):  
Bao Liang Shi ◽  
Chao Zhang ◽  
Yao Wen Tang ◽  
Guo Jie Wei ◽  
Yan Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Yield Strength ◽  
Aging Time ◽  
Size Increase ◽  
Microstructure And Mechanical Properties ◽  
The Matrix ◽  
High Temperature Aging ◽  
Temperature Aging

The changes of the microstructure and mechanical properties of T23 steel were investigated during high temperature aging at 625 °C up to 3000 h. The results showed that the bainitic lath microstructure first decreased and then totally disappeared with the increase of aging time, the size of the carbides gradually increased and the recovery occurred after aging for 1000 h. The contents of W, Mo elements in the matrix after aging for 3000 h were remarkably decreased by 27.6% and 45% compared with the as-received state. However, no M6C carbides formed in spite of the obvious desolution transformation of W, Mo. Both the yield strength and the tensile strength at room and high temperature were decreased with the increase of aging time at 625 °C, and the tensile strength at high temperature after aging for 3000 h exhibited the largest of decline compared with the as-received state. The main reasons for the decrease of the mechanical properties related to the microstructure variations, such as the size increase of the M23C6 carbides, the dissolution of the bainite lath microstructure and the occurrence of the recovery. Meanwhile, the desolution of W, Mo elements plays an important role in the decrease of the mechanical properties.

scholarly journals Effects of Tempering Temperature on the Microstructure and Mechanical Properties of T92 Heat-Resistant Steel

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 194 ◽  
Author(s):  
Dandan Zhao ◽  
Shenghua Zhang ◽  
Hai Zhang ◽  
Shilei Li ◽  
Huifang Xiao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Yield Strength ◽  
Dominant Factor ◽  
Resistant Steel ◽  
Tempering Temperature ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Microstructure And Mechanical Properties ◽  
Tempering Process

T92 heat-resistant steel is among the most promising candidate materials for structural components in the Generation IV (GEN-IV) reactors. The effects of tempering temperature on the microstructure and mechanical properties of the T92 steel were studied. The microstructural evolution of the T92 steel subjected to various temperatures of the tempering process were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and synchrotron radiation X-ray diffraction (SR-XRD). The mechanical properties of Vickers hardness, tensile test, and impact test were also investigated. The results showed that the grain size of the prior austenite does not significantly change during the tempering process, while the width of the martensite lath and the size of the carbide precipitates increased with increasing tempering temperature. The hardness and yield strength of the T92 steel decreased, and the plasticity and impact energy increased with increasing tempering temperature. Coarsening of the carbide precipitates during the tempering process was considered to be the dominant factor that reduced the yield strength in the T92 steel.

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