▎ 摘　　要

NOVELTY - A door trim board injection mold comprises 90-110 pts. wt. iron powder, 0.5-1 pt. wt. graphene, 10-13 pts. wt. rare-earth powder, 3-5 pts. wt. ethyl silicate, 3-5 pts. wt. molybdenum powder, 3-5 pts. wt. chromium powder, 1-3 pts. wt. vanadium powder, 2-5 pts. wt. silicon powder and 2-4 pts. wt. tungsten carbide powder. USE - Door trim board injection mold (claimed). ADVANTAGE - The door trim board injection mold enables injection molding by preventing tempering brittleness of steel, reducing heat sensitivity, and improving stability of tempering and mechanical property of mold steel. The door trim board injection mold is heat-treated to complete organizational changes and eliminate stress, and is subjected to low-temperature tempering to eliminate residual stress. The door trim board injection mold has excellent strength, abrasion resistance, thermal fatigue resistance, impact toughness, high-temperature strength and service life, and high quality.