In view of unqualified mechanical properties in the production process of the hot-rolled medium-thick plate of No.45 steel,in particular unqualificated elongation,this paper studies the influence factors of the elongation of the hot-rolled steel plate of No.45 steel.Through the macro-property tensile test and micro-metallographic structure observation of the samples of the hot-rolled steel plate of No.45 steel,this paper compares the samples with qualified elongation and ones with unqualified elongation in terms of non-metallic inclusions,banded struc-ture,the percentage content of pearlite,grain sizes,etc.,and obtains the influence factors of the unqualified elonga-tion of the hot-rolled steel plate of No.45 steel.
维普
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