MANUFACTURING METHOD FOR HOT ROLLED STEEL SHEET FOR OIL WELL TUBE AND HOT ROLLED STEEL SHEET THEREOF

摘要

Disclosed are a method for manufacturing a hot rolled steel sheet for an oil well tube and a hot rolled steel sheet manufactured thereby. In one embodiment, the method for manufacturing a hot rolled steel sheet for oil wells includes: carbon (C): 0.2 to 0.3 wt%, silicon (Si): more than 0 and 0.25 wt% or less, manganese (Mn): 1.15 to 1.55 wt%, aluminum (Al) : 0.01 to 0.05 weight%, phosphorus (P): more than 0 and 0.018 weight% or less, sulfur (S): more than 0 and 0.005 weight% or less, nitrogen (N): more than 0 and 0.006 weight% or less, and residual amount of iron (Fe) Reheating the steel slab containing the steel and other unavoidable impurities; Manufacturing a hot rolled sheet by hot rolling the reheated steel slab under a finish rolling temperature of 800 ° C. to 850 ° C .; And winding the hot rolled sheet material to a winding temperature: 600 to 660 ° C.