The invention discloses a preparing method for wear-resisting steel used for a water-cooling
nozzle. The preparing method includes the following steps that
smelting and pouring are conducted; heat treatment is conducted; a steel billet obtained after heat treatment is subjected to pretreatment and then put into a
boriding agent, the temperature is increased to 910 DEG C to 930 DEG C, heat insulation is conducted for 6 h to 7 h, and then a steel billet generated after
boriding is obtained; and covering of a conversion film is conducted. The use amount of the
boriding agent ranges from 1.3 g / cm<2> to 1.6 g / cm<2>, and the boriding agent includes, by weight, 4-6 parts of
boron carbide, 10-15 parts of
borax, 3-4 parts of
potassium fluoborate, 0.5-1 part of
sodium fluosilicate, 5-7 parts of
sodium bicarbonate, 40-50 parts of
silicon carbide and 30-35 parts of
activated carbon. Covering of the conversion film includes the specific steps that the steel billet generated after boriding is cleaned and then put into a conversion solution, the temperature is increased to 40 DEG C to 50 DEG C, heat insulation is conducted for 18 min to 22 min, and the wear-resisting steel used for the water-cooling
nozzle is obtained through
drying. The wear-resisting steel has good wear-resisting performance and is good in
corrosion resistance performance and high
temperature resistance performance.