Comparative study of tensile and charpy impact properties of X70 and X80 linepipe steels after ultra fast cooling processing

2017 ◽  
Vol 32 (3) ◽  
pp. 654-660 ◽  
Author(s):  
Zhuang Li ◽  
Yong Tian ◽  
Zhenyao Shao ◽  
Zhanshan Wei
2010 ◽  
Vol 48 (10) ◽  
pp. 875-883 ◽  
Author(s):  
Hyo Kyung Sung ◽  
Sang Yong Shin ◽  
Wooyeol Cha ◽  
Kyungshik Oh ◽  
Sunghak Lee ◽  
...  

2007 ◽  
Vol 38 (8) ◽  
pp. 1731-1742 ◽  
Author(s):  
Young Min Kim ◽  
Sang Yong Shin ◽  
Hakcheol Lee ◽  
Byoungchul Hwang ◽  
Sunghak Lee ◽  
...  

2011 ◽  
Vol 528 (9) ◽  
pp. 3350-3357 ◽  
Author(s):  
Hyo Kyung Sung ◽  
Sang Yong Shin ◽  
Wooyeol Cha ◽  
Kyungshik Oh ◽  
Sunghak Lee ◽  
...  

2009 ◽  
Vol 49 (8) ◽  
pp. 1191-1199 ◽  
Author(s):  
Sang Yong Shin ◽  
Kyungshik Oh ◽  
Ki Bong Kang ◽  
Sunghak Lee

2011 ◽  
Vol 228-229 ◽  
pp. 505-508 ◽  
Author(s):  
Jian Kang ◽  
Guo Yuan ◽  
Zhao Dong Wang

The new generation TMCP process based on ultra fast cooling has recently developed rapidly. In order to develop the low yield ratio constructional steel, the effects of cooling finishing temperature on microstructure and yield ratio of steels were studied primarily. The results show that the high strength and low yield ratio can be achieved by multiphase including M-A hard second phase and bainite ferrite soft matrix. When UFC final temperature is 521°C, the uniform M-A phases with volume fraction of 22.5% are distributed on bainite ferrite matrix, and then the yield strength is 570MPa, tensile strength 760MPa, yield ratio 0.75, and percentage elongation 22% with the Charpy impact energy 284J at -40°C. All these indexes come up to the relevant standards. The steel with lower yield ratio can be subjected to larger plastic deformation before the necking instability.


2009 ◽  
Vol 41 (2) ◽  
pp. 329-340 ◽  
Author(s):  
Seung Youb Han ◽  
Sang Yong Shin ◽  
Sunghak Lee ◽  
Nack J. Kim ◽  
Jin-Ho Bae ◽  
...  

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