The invention discloses a hot-rolled
wire rod for a hardening-
tempering-free hot galvanizing bolt and a production technology of the hot-rolled
wire rod. The
wire rod is prepared from the following chemical components in percentage by
mass: 0.30-0.40% of C, 0.15-0.35% of Si, 0.45-0.85% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 0.8-1.10% of Cr and the balance of iron and unavoidable
impurity elements. In the production technology, after a
continuous casting process is finished, a
casting blank is heated to 1,090-1,130 DEG C, and the heat preservation is performed for 100-140 min; in a rolling process, the temperature at a finish rolling entrance is controlled at 760-830 DEG C; after the rolling, the process enters a Stelmor cooling line, and a fan heat cover and a fan are completely closed. According to the hot-rolled wire rod and the production technology disclosed by the invention, easy-to-deform ferrite and pearlitic structure are obtained through low-temperature rolling, thus the wire rod can be subjected to cold heading deformation without annealing; on the basis, by adding a proper amount of C, Si, Mn and Cr reinforcing elements, the bolt cansurely meet the requirements of 8.8-class hot galvanizing standard without hardening and
tempering treatment; the bolt hardening and
tempering treatment process of traditional technology is saved, the cost of
deep processing is remarkably lowered, and the production efficiency is improved.