ANS:A - tungsten carbide

Powder metallurgy technique is commonly used in the production of tungsten carbide tools. Explanation:

1. Tungsten Carbide Tools: Tungsten carbide is a hard and wear-resistant material made by powder metallurgy techniques. In this process, tungsten carbide powder is mixed with a binder material (such as cobalt) and pressed into the desired shape under high pressure. The compacted part is then sintered at high temperatures to fuse the powder particles together, resulting in a dense and hard material suitable for cutting tools, inserts, drills, and other applications where wear resistance and durability are required.
2. High Carbon Steel: High carbon steel is typically produced by traditional methods such as casting or forging rather than powder metallurgy. While high carbon steel can be alloyed with other elements to improve its properties, it is not commonly manufactured using powder metallurgy techniques.
3. High Speed Steel: High speed steel (HSS) is another type of tool steel used for cutting tools, drills, and other applications requiring high wear resistance at elevated temperatures. HSS is typically produced by traditional methods involving melting, casting, and forging rather than powder metallurgy.
4. Drilling Tools: While drilling tools may incorporate materials produced using powder metallurgy techniques (such as tungsten carbide inserts), the drilling process itself does not typically involve powder metallurgy directly.