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Ti-Nb-P 첨가 극저탄소 고강도 강판의 기계적 성질과 연성-취 천이거동
박종재,이오연,박영구,한상호,진광근,Park J. J.,Lee O. Y.,Park Y. K.,Han S. H.,Chin K. G. 한국재료학회 2004 한국재료학회지 Vol.14 No.12
The purpose of this research is to investigate the mechanical property and ductile-brittle transition temperature of Ti-Nb-P added extra low carbon interstitial free steel having a tensile strength of 440 MPa. The mechanical property and transition temperature of hot rolled steel sheets were more influenced by the coiling temperature rather than by the small amount of alloying element. Further, at the same composition, the property of the specimen coiled at low temperature was superior to that obtained at higher coiling temperature. The fracture surface of 0.005C-0.2Si-1.43Mn steel coiled at $630^{\circ}C$ showed a ductile fracture mode at $-100^{\circ}C$, but coiling at $670^{\circ}C$ showed a transgranular brittle fracture mode at $-90^{\circ}C$. The galvannealed 0.006C-0.07Si-1.33Mn steel sheet annealed at $810^{\circ}C$ has tensile strength and elongation of 442.8 MPa and $36.6\%$, respectively. The transition temperature of galvannealed 0.006C-0.07Si-1.33Mn steel sheet was increased with a drawing ratio, and the transition temperature of the galvannealed 0.006C-0.07Si-1.33Mn steel was $-60^{\circ}C$ at a drawing ratio of 1.8
구연 / 제 1 회의장 / 위장관 2 : 인두 및 후두 증상이 있는 환자에서 상부식도 이소성 위점막 유무에 따른 보행성 24 시간 식도 산도검사의 비교
김은아(E . A . Kim),강동훈(D . H . Kang),조해석(H . S . Cho),박동균(D . K . Park),김선숙(S . S . Park),박종재(S . S . Park),최덕주(J . J . Choi),박현철(D . J . Park),구양서(H . C . Koo),김주현(J . H . Kim) 대한소화기학회 1999 대한소화기학회 추계학술대회 Vol.1999 No.-