Hot rolled steel strip for economical rotary drilling rig sleeve and production method of hot rolled steel strip

The invention provides a hot rolled steel strip for an economical rotary drilling rig sleeve. The hot rolled steel strip is prepared from, by weight, 0.06%-0.10% of C, 0.08%-0.20% of Si, 1.30%-1.50% of Mn, smaller than or equal to 0.018% of P, smaller than or equal to 0.005% of S, 0.020%-0.060% of Alt, 0.035%-0.050% of Nb, 0.050%-0.080% of Ti, 0.25%-0.40% of Cr, smaller than or equal to 0.0050% of N, smaller than or equal to 0.0005% of B and the balance Fe and inevitable impurities. The invention further provides a production method of the economical hot rolled steel strip for the rotary drilling rig sleeve. The production method comprises the following steps of molten iron pretreatment, top-bottom combined blowing of a converter, LF external refining, slab continuous casting, casting blank stack cooling, heating, rough rolling, finish rolling, laminar cooling and coiling. According to the economical hot-rolled coil plate straight welded pipe, Nb, Ti and Cr composite components are adopted, Mo and V alloys ar