Preparation method for producing low-alloy high-strength wear-resistant steel by adopting DQ process

The invention discloses a preparation method for producing low-alloy high-strength wear-resistant steel by adopting a DQ process, which comprises the following steps: sequentially carrying out molten iron pretreatment according to the components of the wear-resistant steel; smelting in a converter; refining outside an LF (Ladle Furnace); vD (vacuum degassing); continuously casting a 3500 wide slab; stacking and slowly cooling the casting blanks; heating the plate blank, wherein the reheating temperature of the plate blank is 1200-1280 DEG C; rough rolling; finish rolling; after rolling, a DQ process is directly adopted to accelerate cooling, and the final cooling temperature is 100-250 DEG C; and mechanical cold straightening. According to the preparation method for producing the low-alloy high-strength wear-resistant steel by adopting the DQ process, C-Mn-Cr-B is reasonably proportioned, 10-20% of bainite is introduced into a martensite structure in combination with the DQ process technology, the performance