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泰县工具厂生产的钢丝钳、鲤鱼钳是经400t摩擦压力机热挤压成型的。所用模具为3Cr2W8V钢挤压模,模具截面尺寸在80～100mm之间。以前采用1100℃加热保温后油淬,560℃×2h回火热处理工艺。经淬火、回火后模具表面硬度虽能达到HRC 45,但因截面较大,表层硬化层较薄,心部难以淬透,加上使用中模具承受的应力较高,服役条件恶劣,故使用寿命较低,每个模具仅能压1000余
Taixian tool factory production of pliers, carp pliers are 400t friction press hot extrusion molding. The mold used for 3Cr2W8V steel extrusion die, die cross-sectional dimensions between 80 ~ 100mm. Before using 1100 ℃ heating and holding oil quenching, 560 ℃ × 2h tempering heat treatment process. After quenching and tempering, although the surface hardness of the mold can reach HRC 45, it is hard to be hardened due to the large cross-section, thinning of the hardened surface and difficult to harden the heart due to high stress on the mold under service and poor service conditions Low life expectancy, each mold can only pressure 1000