| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: invention may be used in production of wide hot-rolled strips with thickness of 4.09.0 mm from low-alloyed steel grades, designed for further manufacturing of vehicle power elements by the method of stamping (beams, crosspieces, frames of trucks). Steel is melted, containing the following components, wt %: carbon 0.100.20; silicon 0.100.50; manganese 1.151.45; sulfur 0.010 max.; phosphorus 0.015 max.; chrome 0.10 max.; nickel 0.150.25; copper 0.150.25; aluminium 0.0200.050; niobium 0.050.08; vanadium 0.030.05; titanium 0.0100.025; iron - balance, then the following is carried out - continuous pouring, hot rolling with temperature of plastic deformation completion in the range of 790840C, differentiated cooling of upper and lower surface of a strip with water, at the same time strip temperature depending on its final thickness prior to winding into a roll is maintained in the range of 550-600C. ^ EFFECT: higher strength characteristics of a coiled hot-rolled strip with preservation of plasticity. ^ 1 ex, 2 tbl |
