Study on Continuous Cooling Transformation Behavior of Coarse Grain Heat-Affected Zone in V-N-Ti and Nb-V-Ti Microalloyed Offshore Platform Steels

2016 ◽  
pp. 525-531
Author(s):  
Feng Lu ◽  
Feng Chai ◽  
Guangping Cheng ◽  
Hang Su ◽  
Nan Li ◽  
...  
Keyword(s):  
Heat Affected Zone ◽  
Offshore Platform ◽  
Coarse Grain ◽  
Transformation Behavior ◽  
Continuous Cooling Transformation ◽  
Continuous Cooling

Phase Transformation Behavior and Microstructure Characterization of 9Ni Cryogenic Steel

2012 ◽  
Vol 472-475 ◽  
pp. 1183-1187
Author(s):  
Duan Jun Wang ◽  
Yu Hui Wang ◽  
Li Gang Liu ◽  
Wen Jun Liu ◽  
Xi Qing Zhao ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Heat Affected Zone ◽  
Transformation Behavior ◽  
Cooling Rates ◽  
Area Density ◽  
Continuous Cooling Transformation ◽  
Phase Transformation Behavior ◽  
Continuous Cooling ◽  
Cryogenic Steel

The SHCCT (simulated heat affected zone continuous cooling transformation) of 9Ni cryogenic steel were investigated. The microstructures observed in simulated heat affected zone (HAZ) continuous cooled specimens are composed of bainite (B) and martensite (M) depending on the cooling rates. The dimension of prior austensite grain, M-A constituent content, M-A dimension, M-A area density increase with increased the time of t8/5.

Continuous Cooling Transformation Behavior of High Carbon Pearlitic Steel

2022 ◽  
Vol 905 ◽  
pp. 83-87
Author(s):  
Lu Lu Feng ◽  
Wei Wen Qiao ◽  
Jian Sun ◽  
De Fa Li ◽  
Ping Ping Li ◽  
...  
Keyword(s):  
Cooling Rate ◽  
Vickers Hardness ◽  
Hardness Test ◽  
Pearlitic Steel ◽  
Transformation Behavior ◽  
High Carbon ◽  
Continuous Cooling Transformation ◽  
Continuous Cooling ◽  
Test Steel ◽  
Lamellar Pearlite

The continuous cooling transformation behavior of high-carbon pearlitic steel was studied by employing optical microscopy, scanning electron microscopy, and the Vickers hardness test. The results show that the microstructure of the test steel is composed of proeutectoid cementite and lamellar pearlite in the cooling rate range of 0.05–2 °C/s and lamellar pearlite in the range of 2–5 °C/s. Further, martensite appears at 10 °C/s. With the increase in the cooling rate, the Vickers hardness of the test steel first decreases and then increases. In the industrial production of high-carbon pearlite steel, the formation of proeutectoid cementite at a low cooling rate needs to be avoided, and at the same time, the formation of martensite and other brittle-phase at a high cooling rate needs to be avoided.

Continuous Cooling Transformation Behavior of a Microalloyed Spring Steel

2003 ◽  
Author(s):  
J. D. Boyd ◽  
P. Zhao ◽  
J. Panatarotto ◽  
G. Nadkarni ◽  
T.G. Oakwood
Keyword(s):  
Spring Steel ◽  
Transformation Behavior ◽  
Continuous Cooling Transformation ◽  
Continuous Cooling
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