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作为液化石油气贮罐用钢材,以连铸坯轧制生产了38mm 的 SL37A 厚钢板,研究了其钢板特性.控制轧制(KTR)和控制轧制控制冷却(MACS)钢板的脆性裂纹停止特性 K_[ca],在-50℃时达到600kgf/mm~3/~2、淬火回火(QT)钢的立向 MIG(惰性气保护焊)、TIG(惰性气保护弧焊)、SMAW(保护金属弧焊)和横向 SAW(埋弧焊),以及 QT、KTR 和 MACS 钢的65～115kJ/cm 大线能量焊接 EGW(电气焊)的焊缝熔合区特性是:v_E_5在470kgf/mm~3/~2以上,-50℃的 COD 值在0.3mm 以上,K_(ca)在470kgf/mm~3/~2以上。根据这些数据,确认了用 QT、KTR 和 MACS 法可以制造适用于液化石油气贮罐用的以连铸坯生产的 SLA37厚钢板.
As a steel for liquefied petroleum gas storage tank, SL37A thick steel plate of 38mm was produced by continuous casting, and the properties of the steel plate were studied.The brittle crack arrest characteristics of controlled rolling (KTR) and controlled rolling controlled cooling (MACS) steel plate K_ [ca], up to 600 kgf / mm ~ 3 / ~ 2 at -50 ° C, vertical MIG (Quench), TIG (inert gas shielded arc welding), SMAW Metal arc welding) and transverse SAW (submerged arc welding) and QT, KTR and MACS steel 65 ~ 115kJ / cm large wire welding EGW (electric welding) weld fusion zone characteristics are: v_E_5 at 470kgf / mm ~ 3 / ~ 2 or more, the COD value at -50 ° C is at least 0.3 mm, and the K_ (ca) is at least 470 kgf / mm ~ 3 / ~ 2. Based on these data, it was confirmed that the QT, KTR and MACS methods can be used to manufacture slab-thick SLA37 steel plates suitable for liquefied petroleum gas storage tanks.