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| Effect of forging process on microstructure and property of#br#
2Cr11Mo1VNbN heatresistant steel |
| GONG Zhihua1，2，WANG Liwei3，YAO Bin3，HE Yudong3，#br#
ZHAO Jiqing2，YANG Gang2 |
| (1.Institute of Materials and Metallurgy， Inner Mongolia University of Science and Technology， Baotou 014010，Nei Mongol， China； 2. Institute of Special Steels， Central Iron and Steel Research Institute，Beijing 100081， China；3. Department of Science and Technology， Sichuan Changcheng Special Steel Co.， Ltd.， Pangang Group, Jiangyou 621700, Sichuan, China) |
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Abstract In order to solve the problem of large difference in transverse and longitudinal properties of 2Cr11Mo1VNbN steel， OM and SEM were used to investigate the evolution of microstructure and mechanical properties of 2Cr11Mo1VNbN martensitic heatresistant steel for super (super) critical blades under different forging processes. The results show that the increase number of upsetting and stretching has little effect on the longitudinal properties including strength，plasticity and toughness. The transverse properties including toughness and area reduction improved by double upsetting and stretching processes. The size of primary NbC decreased during deformation and heating treatment processes，which resulting the decrease rate of crack formation and expansion during impacting test.
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Received: 26 February 2019
Published: 15 November 2019
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2019, Vol. 54 
