The invention discloses a manufacturing method of a wear-resisting
alloy steel guard sleeve applied to a shot blasting chamber. The manufacturing method includes the following steps of A, preparationof materials; B,
smelting; C, pouring; D, cooling, wherein a
casting obtained in step C is cooled by wind for 20-30 min, then cooled in water for 15-25 min and condensed for 10-15 min through a condensation device; E, annealing, wherein the
casting obtained after cooling in step D is ground, machined and heated, the temperature is maintained constant, then raised and remained constant, and coolingthrough water is carried out quickly; F,
quenching, wherein the
casting is heated to 900-1,000 DEG C for
quenching, and
tempering is conducted in time after
quenching. The method has the following advantages that since appropriate materials and an appropriate proportion are selected,
vacuum pumping is conducted, then
smelting is carried out, correspondingly the
dissolution uniformity of a solution is high, cooling is carried out through three
modes step by step after pouring, and the quality of casting is ensured; therefore, a guard board has high
hardness, intensity and tenacity and achievesgreat mechanical performance, the service life is long, and better economic performance and comprehensive mechanical performance are achieved.