▎ 摘　　要

NOVELTY - Wear-resistant and corrosion-resistant composite material comprises high-density polyethylene, linear low-density polyethylene, ultra-high molecular weight polyethylene, reinforcing fibers, and processing additive, and is prepared by mixing the dried components, melt extruding and granulating, plasticizing and uniformly mixing to obtain injection-molding grade composite material, where the reinforcing fibers are mixed with other materials by feeding sideways and then added, the reinforcing fibers comprise basalt fiber, potassium hexatitanate whisker, and/or sepiolite fibers that have been surface-activated by a surface modifier, the surface activation process of the reinforcing fiber uses a surface modifier, and the bagging activation is carried out for not less than 20 hours, the surface modifier comprises silane coupling agent and/or titanate coupling agent, and the processing additive comprises plasticizer, nucleating agent, lubricant, thermally conductive agent, and/or antioxidant. USE - The wear-resistant and corrosion-resistant composite material is used for injection molding. DETAILED DESCRIPTION - Wear-resistant and corrosion-resistant composite material comprises 35-50 parts mass high-density polyethylene, 20-30 parts mass linear low-density polyethylene, 15-35 parts mass ultra-high molecular weight polyethylene, 5-15 parts mass reinforcing fibers, and 1.5-5 parts mass processing additive, and is prepared by mixing the dried components, melt extruding and granulating, plasticizing and uniformly mixing to obtain injection-molding grade composite material, where the reinforcing fibers are mixed with other materials by feeding sideways and then added, the molecular weight of the ultra-high molecular weight polyethylene is 8-12 million, the high-density polyethylene has a crystallinity of 70-85% and melt index of 15-20 g/10minute, the linear low density polyethylene has a crystallinity of 55-70% and melt index of 30-50 g/10 minute, the reinforcing fibers comprise basalt fiber, potassium hexatitanate whisker, and/or sepiolite fibers that have been surface-activated by a surface modifier, the surface activation process of the reinforcing fiber uses a surface modifier of 0.5-1.5 wt.% of the fiber, and the bagging activation is carried out for not less than 20 hours, the surface modifier comprises silane coupling agent and/or titanate coupling agent, and the processing additive comprises plasticizer, nucleating agent, lubricant, thermally conductive agent, and/or antioxidant. An INDEPENDENT CLAIM is also included for a method for manufacturing a pump fitting, which involves drying 35-50 parts mass high-density polyethylene, 20-30 parts mass linear low-density polyethylene, 15-35 parts mass ultra-high molecular weight polyethylene, 5-15 parts mass reinforcing fibers, and 1.5-5 parts mass processing additive, melt extruding and granulating, plasticizing and uniformly mixing to obtain injection-molding grade composite material, where the reinforcing fibers are mixed with other materials after side feeding, and using the resulting injection-molding grade composite material to produce pump parts by injection molding, where the injection molding is carried out by maintaining the temperature at 180-200degrees Celsius in first zone, 230-270degrees Celsius in second-fourth zone, injection pressure of 80-120 Pa, flow rate of 70-90% of the maximum flow rate of the injection molding machine, and mold temperature of 60-80degrees Celsius,