Effect of aging temperature on the microstructures and mechanical properties of ZG12Cr9Mo1Co1NiVNbNB ferritic heat-resistant steel

2016 ◽  
Vol 23 (2) ◽  
pp. 168-175 ◽  
Author(s):  
Xue Yang ◽  
Lan Sun ◽  
Ji Xiong ◽  
Ping Zhou ◽  
Hong-yuan Fan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aging Temperature ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Microstructures And Mechanical Properties

scholarly journals Microstructures and Mechanical Properties of a Newly Developed Austenitic Heat Resistant Steel

2018 ◽  
Vol 32 (4) ◽  
pp. 517-525 ◽  
Author(s):  
Peng Liu ◽  
Zhao-Kuang Chu ◽  
Yong Yuan ◽  
Dao-Hong Wang ◽  
Chuan-Yong Cui ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Microstructures And Mechanical Properties

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.

Precipitation of Nano-Sized Z-Phase in HR3C Austenitic Heat Resistant Steel

2013 ◽  
Author(s):  
Fengshi Yin ◽  
Zhen Xu ◽  
Bing Xue ◽  
Li Zhou ◽  
Xuebo Jiang
Keyword(s):  
Aging Temperature ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Resistant Steel ◽  
Secondary Phases ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
M23c6 Type ◽  
Type Carbide ◽  
Austenite Grains

Effect of heat treatment on the precipitation behavior of secondary phases in a HR3C austenitic heat resistant steel was investigated. The microstructure of the steel in solution-treated state consists of austenitic matrix and coarse Z-phase particles. After aging treatment at 650–950°C for 1h, M23C6-type carbide precipitates along random grain boundaries. Dense and homogeneous nanosized Z-phase precipitates within austenite grains are obtained by an aging treatment at a temperature between 800 and 900°C for 1h. The high density of dislocation walls produced during the water-cooling process after solution treatment facilitate the precipitation of the nanosized Z-phase. With increasing the aging temperature, the hardness initially drops, then increases and reaches a peak when the aging temperature is at 850°C due to the precipitation of the nanosized Z-phase.

Sign in / Sign up

Export Citation Format

Share Document