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60 kgf/㎟급 자동차용 변태유기소성강화강 Zn-Ni 전기도급 특성 연구
김동환(D. H. Kim),김병일(B. I. Kim),전유택(Y. T. Jeon),정연수(Y. S. Jeong) 한국표면공학회 2004 한국표면공학회지 Vol.37 No.5
High strength steels such as transformation induced plastic steel, dual phase and solid solution Hardening have been developed and continuously improved due to the intensified needs in the automotive industry. But silicon and manganese in transformation induced plastic steels were known to exhibit harmful effects on galvannealing reaction by oxide film formed during heat treatment. Therefore, in this work, the applicability of Zn-Ni electrodeposition instead of hot dip galvannealed coating to transformation induced plastic steels was evaluated and optimum electroplating condition was investigated. Based on these investigations optimized electroplating conditions were proposed and Zn-Ni electrogalvanized steel sheet was produced by EGL (electrogalvanized line). Its performance properties for automotive steel was evaluated.