High Performance Structural Steels for Shipbuilding and Offshore Structures
Recently, there have been the increase of ship size and the development of oil and gas in arctic region. These trends have led to the requirements such as high strength, good toughness at low temperature and good weldability. The high performance structural steels for shipbuilding and arctic offshore structure have been developed by our own micro-alloying and TMCP technologies. M-A constituent was precisely controlled in the both HAZ and base metal to get high toughness at low temperature. Also, the grain growth of austenite at HAZ was effectively suppressed by thermally stable TiN particles, leading to a good HAZ toughness. On the other hand, there has been the key issue of crack arrestability in large size container ship. The effect of joint design on crack arrestability was investigated to prevent a catastrophic failure along the block joint of hatch side coaming. A brittle crack arrest technique was developed without block joint shift, using an arrest weld in the end of hatch side coaming weld line.
shipbuilding offshore weldability toughness micro-alloying TMCP brittle crack crack arrestability
Wung-Yong Choo In-Shik Suh Sangho Kim Gyu-Baek An Chang-Sun Lee
Technical Research Laboratories,POSCO,1 Geodong-dong,Nam-gu, Pohang,Gyungbuk,790-785,Korea
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
94-101
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）