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By Dr.Zhang from Nanjing Normal University | 16 July 2020 | 0 Comments

How Strong Can Tungsten Carbide be?

How Strong Can Tungsten Carbide be?
 
What is tungsten carbide?
 
Tungsten carbide is a compound containing equal amounts of tungsten and carbon atoms (specifically, tungsten carbide). In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed into various shapes by a process called sintering, and is used in industrial machinery, cutting tools, abrasives, armor piercing bullets, other tools and instruments, and jewelry.
Tungsten carbide is about twice as hard as steel, and young's modulus is about 530-700 GPa, twice as dense as steel -- nearly half as dense as lead and gold. It is comparable in hardness to corundum (alpha-al2o3) and can only be polished with high-hardness abrasives such as cubic boron nitride and diamond powder, wheels and compounds.
 
What is tungsten carbide used for?
 
1. Tungsten carbide rings
Tungsten carbide, in the form of cemented carbide (cemented carbide particles brazed together by metal), has become a popular material in the bridal jewelry industry due to its extremely high hardness and scratch resistance. The tungsten carbide ring is one of them. Even with high impact resistance, this extreme hardness means that it will occasionally break under certain circumstances. Some people think this is useful because the impact can break the tungsten ring and quickly remove it, while precious metals will bent flat and need to be cut. Tungsten carbide is about 10 times harder than 18k gold. Aside from its design and high gloss, it appeals to consumers also because of its technical nature. Special tools, such as pliers, may be needed if the ring must be removed quickly (e.g. in a medical emergency due to hand injuries and swelling).
 
2. Tungsten carbide knife
Tungsten carbide has been used in industrial cutting for nearly a century and the cuts are controllable and repeatable. Its high durability and wear resistance allows it to outperform steel tools, cutting faster, and leaving a machined part with a better surface finish.
The properties of tungsten carbide make it a great tool and make it difficult to be a tool material. Standard abrasives and manufacturing processes used to grind steel cannot handle tungsten carbide. The biggest obstacle is that tungsten carbide is more brittle than steel. The test tool compensated with tungsten carbide, either sandwiched between stronger materials or deposited a thin layer of tungsten carbide directly onto the blade.
However, Sandrin, a manufacture uses the blades made of solid fragments of tungsten carbide. Sandrin’s proprietary formulation of the metal overcome tungsten carbide’s natural brittleness." Sandrin used a proprietary mixture that made it possible," Mr. Bianchin said. By keeping Rockwell hardness at 71, Sandrin maintains blade strength and edge stability. The end result is a sharp knife. "The blade life of a tungsten carbide cutter is many times longer than that of steel," says Bianchin.
 
3. Tungsten carbide drill bits
Tungsten carbide bits are widely used, including in manufacturing. Carbide drill bits come in all sizes and are used in many industries.
A carbide bit is usually attached to a tool, usually a drill that forces the drill bit to rotate and provides sufficient torque to create a hole for the intended purpose.
Tungsten carbide and carbide mixes are extremely hard, producing suitable drilling performance in most materials, while having longer sharp edges than other bit materials. Because of its durability, tungsten carbide is quite expensive, which is why industry uses more recycled tungsten carbide tools. Carbide recyclers collect carbide wastes from various industries and mechanical workshops and process them through carbide recycling.
TRUNNANO (Luoyang Trunnano Tech Co., Ltd ) is a professional Tungsten carbide manufacturer with over 12 years experience in chemical products research and development. If you are looking for high quality Tungsten carbide, please feel free to contact us and send an inquiry.

 

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