한국어
학부모민원갑질사례
평범한 선생님은 말을 하고, 좋은 선생님은 설명을 하며, 뛰어난 선생님은 몸소 보여주고, 위대한 선생님은 영감을 준다
3. The Advanced Manufacturing Process of Powder Metallurgy
The creation of a tungsten carbide ring is an engineering feat that diverges entirely from the traditional jewelry-making methods of casting or forging soft metals like gold and silver. Because tungsten carbide has an impractically high melting point, far exceeding that of a standard jeweler's torch, it cannot be melted and poured into a mold. Instead, the process relies on a highly specialized technique known as Powder Metallurgy or sintering. The journey begins with ultra-fine tungsten metal and carbon powders, which are meticulously measured and blended, wedding bands often with a nickel binder, to ensure a uniform composition. This composite powder is then poured into high-pressure steel dies in the basic cylindrical shape of the desired ring and tungsten subjected to immense hydraulic pressure, compressing the powder into a highly dense, yet still brittle, "green state" ring blank. The crucial next step is sintering, where the compacted blank is fired in a vacuum furnace at temperatures exceeding 6,000 degrees Fahrenheit. This intense, oxygen-free heat causes the binder metal to liquefy and flow around the solid carbide particles, fusing them together and creating the final, solid, non-porous tungsten carbide structure. This thermal process also results in significant shrinkage, often up to twenty percent. Once the ultra-hard blank is cooled, it must be cut, shaped, and polished using only diamond-coated tools and abrasives. Because no standard metal tool can affect tungsten carbide's surface, the shaping is akin to cutting a rough diamond, requiring high-power lasers and precision grinding to achieve the final dimensions and mirror-like finish, ultimately underscoring the high-tech, intricate nature of its construction.
celtic
tungsten
The creation of a tungsten carbide ring is an engineering feat that diverges entirely from the traditional jewelry-making methods of casting or forging soft metals like gold and silver. Because tungsten carbide has an impractically high melting point, far exceeding that of a standard jeweler's torch, it cannot be melted and poured into a mold. Instead, the process relies on a highly specialized technique known as Powder Metallurgy or sintering. The journey begins with ultra-fine tungsten metal and carbon powders, which are meticulously measured and blended, wedding bands often with a nickel binder, to ensure a uniform composition. This composite powder is then poured into high-pressure steel dies in the basic cylindrical shape of the desired ring and tungsten subjected to immense hydraulic pressure, compressing the powder into a highly dense, yet still brittle, "green state" ring blank. The crucial next step is sintering, where the compacted blank is fired in a vacuum furnace at temperatures exceeding 6,000 degrees Fahrenheit. This intense, oxygen-free heat causes the binder metal to liquefy and flow around the solid carbide particles, fusing them together and creating the final, solid, non-porous tungsten carbide structure. This thermal process also results in significant shrinkage, often up to twenty percent. Once the ultra-hard blank is cooled, it must be cut, shaped, and polished using only diamond-coated tools and abrasives. Because no standard metal tool can affect tungsten carbide's surface, the shaping is akin to cutting a rough diamond, requiring high-power lasers and precision grinding to achieve the final dimensions and mirror-like finish, ultimately underscoring the high-tech, intricate nature of its construction.
celtic
tungsten