Korean Journal of Metals and Materials

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Integrity Assessment of Obsolete Thermal Storage Tank in District Heating System
지역난방 노후 축열조의 부식 건전성 평가 및 고찰

Daeho Yun, Hobyung Chae, Heesan Kim, Jung-Gu Kim, Woo Cheol Kim, Tae Baek Ha, Jaehyuk Jang, Joon Cheol Jeong, Soo Yeol Lee
윤대호, 채호병, 김희산, 김정구, 김우철, 하태백, 장재혁, 정준철, 이수열

Korean J. Met. Mater. 2020;58(10):693-702. Published online 2020 Oct 5
DOI: https://doi.org/10.3365/KJMM.2020.58.10.693

Abstract
The thermal storage tank in a district heating system is a component that stores excess heat during normal operation and releases the stored heat to increase the efficiency of the system, when the heat source is stopped or additional demands occur. Recently, an obsolete thermal storage tank was dismantled for..... More

Evaluation on Reheat Cracking of Multi-pass Weld Metal of YP 690 QT Steel
해양플랜트용 YP 690 MPa급강 다층 용접부의 재열 균열 특성 평가

Yong Taek Shin, Young Ju Jo
신용택, 조영주

Korean J. Met. Mater. 2018;56(8):580-588. Published online 2018 Aug 5
DOI: https://doi.org/10.3365/KJMM.2018.56.8.580

Abstract
This study evaluated the relationship between reheat cracking that occurs in the reheated weld zone formed by subsequent multi-pass welding and the preheat/interpass temperature. The multi-pass weldment was YP 690 MPa high-strength steel, which is used in mobile offshore platform units. The welding process was flux-cored arc welding (FCAW), which..... More

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