Effect of Boron Contents on Weldability in High Strength Steel

H. W. Lee; Y. H. Kim; S. H. Lee; S. K. Lee; K. H. Lee; J. U. Park; J. H. Sung

추천

검색

질문

자료유형: 학술저널

저자정보: H. W. Lee Y. H. Kim S. H. Lee S. K. Lee K. H. Lee J. U. Park J. H. Sung

저널정보: 대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.21 No.5

발행연도: 2007.5

수록면: 772 - 778 (7page)

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

Three experimental flux cored wires(basic type) designed to produce systematic variations in the concentrations of boron of 32 ppm, 60 ppm and 103 ppm in the weld metal were prepared. A previous study of crack properties, morphology and microstructure in accordance with welding conditions was published in Welding Journal(Lee, 2006). Microstructure, strength and absorbed energy were studied for EH32 TMCP (Thermo-Mechanical Controlled Process) 40 mm thick plate welded with a gas-shielded flux cored arc welding.
The volume fraction of acicular ferrite decreased with increasing boron contents 32 to 103 ppm. The upper bainite instead of acicular ferrite was formed in the 103 ppm boron weld metal. The hardness values welded with 32 ppm and 60 ppm boron wire welds were in the range of Hv 190~210, while those welded with 103 ppm boron wire weld were in the range of Hv 230~235.
The absorbed energy slightly decreased with increasing boron contents from 32 ppm to 60 ppm, but significantly decreased with increasing boron contents from 60 ppm to 103 ppm. In the weld joint welded with 32 ppm and 60 ppm boron content electrode, no cracks were detected. However, cracks were detected the specimen welded with 103 ppm boron content electrode.

#Boron contents #Weld crack #Bainite #Acicular ferrite #Hardenability

참고문헌 (14)

참고문헌 신청

Babu, S. S., Goodwin, G. M., Rohde, R. J. and Sielen, B. 1998. “Effect of Boron on the Microstructure of Low-carbon Steel Resistance Seam Welds,” Welding Journal, Vol. 77, No. 6, pp. 249~253.

Bonnet, C. and Charpentier, F. P., 1998, “Procedure of International Conference on Effect of Residual Impurity and Microalloying Elements on Weldability and Weld Properties,” London, The Welding Institute, Abington, U.K., 8.

Brown, A., Garnish, J. D. and Honeycombe, R. W. K., 1974, “The Distribution of Boron in Pure Iron,” Metal Science 8:317~324.

Kohno, R., Takami, T., Mori, N. and Nagano, K. 1982, “New Flux of Improved Weld Metal Toughness of HSLA Steels,” Welding Journal, Vol. 61, No. 12, pp. 373~380.

Koukabi, A. H., North, T. H. and Bell, H. B. 1975, “Properties of Submerged arc Weld Deposits-effects of Zr,V and Ti/B,” Metal Const. and British W. J., 11:639.

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!