Analysis of performance requirements of die-casting mold materials
The service life of the die-casting mold is closely related to the material of the die-casting mold. Die-casting parts are mainly divided into parts that are in contact with molten metal, sliding-fit parts, and formwork structural parts. Die-casting mold cavities and runners are directly in contact with high-temperature, high-pressure, high-speed metal liquids during metal pressure casting. On the one hand, it is directly washed, worn, high-temperature oxidized and various kinds of corrosion of molten metal: on the other hand, due to the high efficiency of production, the temperature rise and fall of the mold is very intense, and periodic changes are formed. Therefore, the die casting mold steel requires high thermal fatigue resistance, thermal conductivity and good wear resistance, corrosion resistance and high temperature mechanical properties. The selection of die-casting molds is mainly based on the temperature of the cast metal and the type of casting metal. The higher the temperature, the more severe the damage and wear of the die-casting mold. Since the components of the die-casting mold work under different conditions and are affected by the impact and wear of the cast metal, the hardness requirements of the die-casting die should be different depending on the use of the component and the metal to be cast. For example, for parts with more severe wear, it should have higher hardness; for parts working under heated conditions, it should have high thermal fatigue performance and high temperature performance. Table 1 is the hardness requirement of a factory for die-casting molds, which can be used for reference. The hardness required by each factory is different and should be determined according to the specific conditions. Concerned about surprises Label: Analysis of performance requirements of die-casting mold materials Previous: Plastic ball valve maintenance in storage Next: Frequency converter common fault analysis
The Morse taper shank Drill Bit is a self-locking (or self holding) taper of approximately 5/8" per foot that allows the torque to be transferred to the drill bit by the friction between the taper shank and the socket. The tang at the end of the taper is only for ejecting the drill bit from the spindle, with the aid of a drift.
Its material is high speed steel,treatment process is roll-forged
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The arbor of a drill chuck is often a Morse taper and this allows the chuck assembly to be removed and directly replaced with the shank of a Morse taper drill bit.
