Microstructures and toughness in simulated coarse grain heat-affected zones of copper-bearing steel

被引：0
|
作者：
Liu, Wenyan [1 ,2 ]
Wang, Lai [1 ]
Liu, Jibin [2 ]
Li, Pinghe [2 ]
Miao, Kai [2 ]
Han, Rongdong [2 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian, Peoples R China
[2] Wuhan Iron & Steel Univ, Res & Dev Ctr, Wuhan, Peoples R China
来源：
PHYSICAL AND NUMERICAL SIMULATION OF MATERIALS PROCESSING, PTS 1 AND 2 | 2008年 / 575-578卷
关键词：
copper-bearing steel; coarse grain heat-affected zone; granular bainite; M-A constituents;
D O I：
10.4028/www.scientific.net/MSF.575-578.910
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microstructures and toughness of simulated coarse grain heat-affected zone of hot continuously rolled copper-bearing steel were investigated using physical simulation. The results showed that brittlement is easy to happen in the region of CGHAZ with slower thermal cycles (t(8/5)>= 45s). Granular bainite transformed from austenite led to brittlement. The dimensions of granular martensite and austenite (M-A) constituents are main factors influencing the impact toughness. There is no visible effect on the toughness when the dimensions of M-A constituents are less than I p in. However, the toughness decreases greatly once the dimensions exceed I P in. Therefore, decreasing the dimensions of M-A constituents by controlling weld heat input will do good to improve the impact toughness of copper-bearing steel.
引用
收藏
页码：910 / +
页数：2
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