Forging, especially drop forging, is better than machining for several reasons. Firstly, forging produces parts with superior strength and durability compared to machined parts, as the process aligns the grain structure of the metal, resulting in increased strength. Additionally, forging can produce parts with complex shapes and intricate details that would be difficult or impossible to achieve through machining. Furthermore, forging is a more efficient process in terms of material usage, as it produces less waste compared to machining. Overall, forging, and drop forging in particular, offers numerous advantages in terms of part strength, complexity, and material efficiency compared to machining. **

Free forging involves shaping metal by applying compressive forces using hammers or presses without the use of any specific dies or tools. This method allows for more flexibility in shaping the metal but may result in less precise dimensions. On the other hand, die forging involves shaping metal using dies or molds to achieve specific shapes and dimensions. This method provides more control over the final product's dimensions and surface finish, making it suitable for mass production of parts with consistent quality. **

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Coal is commonly used as a fuel source in forging due to its high heat output and ability to reach the temperatures required for shaping metal. While coal is not the only fuel option for forging, it is preferred by many blacksmiths for its efficiency and cost-effectiveness. However, there are alternative fuel sources such as propane or natural gas that can also be used for forging if coal is not available or preferred. Ultimately, the choice of fuel for forging depends on the specific needs and preferences of the blacksmith. **

High-carbon steels such as 1095, 5160, and 52100 are commonly used for forging due to their ability to hold a sharp edge and withstand the stress of repeated heating and hammering. These steels are known for their toughness and ability to be hardened through heat treatment, making them ideal for creating durable and long-lasting forged items such as knives, swords, and tools. It is important to choose a steel with the right balance of carbon content and alloying elements to achieve the desired properties for the specific forging project. **

Borax is used in forging as a flux to help remove impurities and oxides from the metal being worked. When heated, borax forms a glassy layer on the surface of the metal, which helps to prevent oxidation and scale formation. This allows the metal to be worked at higher temperatures without becoming brittle or developing surface imperfections. Additionally, the fluxing action of borax helps to improve the flow and workability of the metal, making it easier to shape and manipulate during the forging process. **

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Yes, lignite can be used for forging. Lignite is a type of coal that is softer and lower in carbon content compared to other types of coal like anthracite. While lignite may not burn as hot or as cleanly as other types of coal, it can still be used for forging purposes, especially for beginners or for projects that do not require extremely high temperatures. It is important to note that lignite may produce more smoke and ash compared to other types of coal, so proper ventilation and safety precautions should be taken when using it for forging. **