Solving Problems of Porosity in Die Casting Parts. Porosity in die casting parts is an important issue in metal-working. Porosity, in the science of materials, refers to the presence of gaps or bubbles inside a metal structure. High porosity tends to weaken the final product. Metal parts production companies are given certificates depending on strength, durability and reliability of their products. Hence, this defect must be minimized.

To fully understand this concept, one must be aware of the metal-shaping process behind it. Die casting is a method that uses high pressure to shape a molten metal. For example, zinc is heated on a furnace to reach its melting point. Then, it will be shot to fill the gap between two dies. That gap is the mold, which contains the shape and details of the final product. As the lump of zinc solidifies, pressure of up to 175 mega Pascal is exerted through the dies. If gases are accidentally mixed during this speedy process, they will result in porosity in die casting parts.

There are three levels of porosity in finished metal parts. The first two levels are acceptable, depending on the expected usage of the part. The third level means that the object is highly porous. There are large gas bubbles inside that will weaken the product against tension.

Most of the time, it is impossible to achieve a 100% pure metal piece if die casting is used. Porosity in die casting parts can be minimized by thoroughly cleaning the dies before operations. Pressures and temperatures must also be matched with the type of metal and intended purpose of the part.

To get a price for aluminum die casting parts or die casting tooling, call toll free 800-524-8083 and ask for sales. Or email us at sales@kineticdc.com for a fast response on a price quote.

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