발간논문

Home > KJMM 논문 > 발간논문

Vol.27, No.5, 452 ~ 463, 1989
Title
Effect of Heat Input on the HAZ Toughness of High Strength Steel ( Part 1 : CTOD Test for Actual Weldings Heat Affected Zone )
윤중근J . G . Youn, 김희진H . J . Kim
Abstract
The effect of welding heat input on the HAZ toughness was systematically investigated through crack tip opening displacement (CTOD) test for two different offshore structural steels of TMCP type API 2H Gr. 50 and normalized BS 4360 Gr. 50D steel. The heat input levels of 15,50 and 70KJ/㎛ were applied in this study. Test results showed that the HAZ toughness of normalized steel deteriorates with increasing heat input, while that of TMCP steel shows the opposite trend. These trend it atlributable to the fact that increasing heat input decreases the amount of the brittle M-A constituent in the HAZ of TMCP steel but has little effect on that of normalized steel in the heat input range between 15 and 70 KJ/㎝. Such the difference in the effect of heat input on the amount of M-A constituent formed in the HAZ can be explained in terms of compositional difference between the two steels. As the result of this study, it can be claimed that the maximum welding heat input level can be raised up to 70kJ/㎝ for TMCP steel.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.