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Fe-P-C-B-Al-Mo 계 비정질합금의 열적 , 화학적 성질에 미치는 P 및 Mo 의 영향
국진선(Jin Seon Gook),전우용(Woo Young Chon) 한국열처리공학회 2002 熱處理工學會誌 Vol.15 No.2
N/A The melt-spun amorphous Fe_(77-x)P_13C_4_B_4Al_2Mo_x(x=4∼15) and Fe_(82-x)P_XC_4B_4Al_2Mo_8(x=9∼15) alloys were found to exhibit a large supercooled liquid reglon(ΔT_x) exceeding 40 K before crystallization. The largest ΔT_x for the glassy alloys containing Mo reaches as large as 65 K for the Fe_69P_13C_4B_4Al_2Mo_8 alloy. The corrosion behavior of the amorphous Fe_(77-x)P_13C_4B_4Al_2Mo_x(x=4∼15) and Fe_(82-x)P_xC_4B_4Al_2Mo_8 (x=9∼17) alloys were examined by electrochemical measurements in 9M H_2SO_4 solution at 303 K. The addition of Mo(or P) for replacing some portion of Fe is effeotive in improving the corrosion resistance of the investigated Fe-based glassy alloys. They are spontaneously passivated and have a wide passive region with low passive current density.
고주파유도용접된 열교환기용 BAS121합금튜브의 기계적 특성에 미치는 인발조건의 영향
한상우,김병일,이현우,전우용,국진선,Han Sang-Woo,Kim Byung-Il,Lee Hyun-Woo,Chon Woo-Young,Gook Jin-Seon 한국재료학회 2004 한국재료학회지 Vol.14 No.12
The aim of this study is to investigate the optimum drawing parameter for BAS121 welded tubes. The BAS121 aluminium alloy tubes with 25 mm in external diameter and 1.3 mm in thickness for heat-exchangers were manufactured by high frequency induction welding with the V shaped convergence angle $6.5^{\circ}$ and power input 55 kW. With increasing the reduction of area ($13,\;21\%$) by drawing, tensile strength was increased and elongation was decreased. With increasing the reduction of area by drawing, hardness in weld metal increased rapidly, while that of base metal increased slowly. In the specimen with the outer diameter smaller than 22 mm, hardness of weld metal was higher than that of base metal. The optimum drawing parameter of area reduction in BAS121 alloys was estimated about $13\%$ because of the work hardening of welds.