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Question:

How does free-cutting steel improve machinability?

Answer:

Free-cutting steel improves machinability by incorporating additives such as sulfur or lead, which form small, brittle chips during the machining process. These chips help break the metal's continuous chip formation, resulting in improved chip control, reduced tool wear, and increased machining speeds. Additionally, free-cutting steel has improved surface finish and dimensional accuracy due to the formation of short, easily-managed chips.
Free-cutting steel improves machinability by having a higher sulfur content, which acts as a lubricant during the machining process. This reduces friction and heat generation, leading to improved chip formation and easier cutting, resulting in higher cutting speeds, improved surface finish, and extended tool life.
Free-cutting steel improves machinability by containing additional elements, such as sulfur, lead, or phosphorus, which help to break the chips and aid in chip removal during the machining process. These elements act as lubricants, reducing friction and heat generation, which results in improved surface finish and reduced tool wear.

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