LPG boat storage tank steel plate and production method thereof
A production method and steel plate technology, applied in the field of metallurgy, can solve the problems of unguaranteed welding performance, high welding crack sensitivity coefficient, and unguaranteed low-temperature toughness of steel plates, etc., and achieve low welding crack sensitivity, excellent comprehensive mechanical properties, Good cold and hot processing performance
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[0040] Examples 1-7
[0041] Table 1 lists the chemical composition and weight percentage of steel plates for LPG ship storage tanks in Examples 1-7 of the present invention, the balance being Fe and unavoidable impurities. In addition, Table 1 also lists the steel plates of each embodiment. Reheat crack sensitivity index G and P SR , Steel plate hardenability coefficient D i , Carbon equivalent CEV and welding crack sensitivity coefficient Pcm.
[0042] Table 1
[0043] Example
[0044] In Examples 1-7, the production method of steel plate for LPG ship storage tank, the steps are as follows:
[0045] 1) After deep desulfurization of molten iron, converter top and bottom blowing, and vacuum treatment, continuous casting into billets, and then heating the cast billets, control the heating temperature at 1170~1250℃, preferably 1180~1230℃, and control the heating rate ≥8min / cm, preferably 8-14 min / cm;
[0046] 2) Carry out hot rolling, control the open rolling temperature not to be l...
Example
[0052] Comparative example 1~2
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