Astm 5120h Steel Plate Die Casting Mold Manufacturing Process - China

Manufacturing Process of Die Casting Molds with ASTM 5120H Steel Plate Forging

The initial step in manufacturing a die casting mold from ASTM 5120H steel plate is forging.

Forging helps to refine the grain structure of the steel, improve its mechanical properties, and eliminate any internal defects.

The steel is heated to an appropriate temperature and then forged using a press or hammer to the desired shape.

This process also helps to align the grain structure in a way that enhances the steel's strength and toughness.

Machining

After forging, the steel is machined to the precise dimensions and shape required for the die casting mold.

This typically involves turning, milling, drilling, and grinding operations.

High-precision machining techniques are essential to ensure the accuracy of the mold cavity and other critical features.

CNC (Computer Numerical Control) machining is often used in this stage to achieve the desired level of precision and repeatability.

Heat Treatment

Heat treatment is a crucial step in optimizing the properties of ASTM 5120H steel plate for die casting molds.

The typical heat treatment process includes quenching and tempering.

Quenching involves heating the steel to a high temperature and then rapidly cooling it in a quenching medium such as oil or water.

This process hardens the steel by forming martensite.

Tempering is then carried out at a lower temperature to relieve the internal stresses generated during quenching and improve the steel's toughness.

The specific heat treatment parameters depend on the size and shape of the mold component and the desired mechanical properties.

Surface Treatment

To further enhance the performance of the die casting mold, surface treatments may be applied to the ASTM 5120H steel plate.

Common surface treatments include nitriding, chrome plating, and polishing.

Nitriding involves diffusing nitrogen into the surface layer of the steel to form a hard and wear-resistant nitride layer.

Chrome plating provides additional corrosion resistance and a smooth surface finish.

Polishing is used to improve the surface smoothness of the mold cavity, reducing friction and improving the surface quality of the cast parts.

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