Which is better for strength: casting or forging?

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Q&A: Casting vs Forging

Which is better for strength: casting or forging?

1. What is the difference between casting and forging?
2. Which process typically results in stronger metal components?
3. Why is forging considered better for strength compared to casting?

Answers

1. Casting is a manufacturing process in which molten metal is poured into a mold and allowed to solidify, forming the desired shape. Forging, on the other hand, involves shaping metal by applying pressure or impact to deform it into the desired form.
2. Forging generally results in stronger metal components compared to casting. This is because the process of forging improves the internal grain structure of the metal, creating a more uniform and aligned grain flow. On the other hand, casting can result in a less uniform grain structure with potential defects like porosity and inclusions.
3. Forging is considered better for strength compared to casting due to the aforementioned reasons. The alignment of grains in forged metal leads to improved mechanical properties such as higher tensile strength, better impact resistance, and increased fatigue strength. In contrast, cast metal may have lower strength and toughness due to its less controlled grain structure.

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