Steel is flame-hardened in the same way as many other ferrous metals—a process also known as "induction hardening," in which a metal is heated by a powerful flame and then "quenched," or rapidly cooled. The rapid cooling of the heated metal results in a final product that is harder and more brittle than the original metal.Know More
Flame hardening is a very popular method of creating stiffer, more brittle products out of ferrous metals. It can also be selectively applied to certain parts of structures to only increase the hardness of certain parts of a finished product. Flame hardening is usually done through the usage of a burning mixture of oxygen and acetylene, such as with a blow torch. This allows the metal to be heated in its entirety or in very small concentrated areas with relative ease.
Quenching the metal after it has been heated is what gives it the properties of being harder and more brittle. There are different methods for quenching heated metals because the only requirement is a fast drop in the temperature of the object. The most common and inexpensive way to quench a metal that is undergoing the flame hardening process is to submerge it in water.Learn more about Precious Metals & Gems
To polish metal, you need a buffing compound and a revolving buffing wheel. Choose the buffing compound for the type of metal you are polishing. Apply a light amount of the compound onto the buffing wheel and press the wheel onto the metal surface with slight pressure until shiny. Repeat the process if the metal is still dull.Full Answer >
When metal is heated, the atoms begin to vibrate. This increased motion causes the atoms to move farther apart. When the atoms move farther apart, the metal expands. This tendency for metals to expand when heated is called thermal expansion.Full Answer >
One of the easiest ways to tell if an object is gold or brass is to look at the size. Most large objects are not made of gold.Full Answer >
Steel is a term used for a number of alloys of iron and carbon with differing physical properties. While the density of steel varies depending on the alloys used to create it, its value is commonly found to be between 7,750 and 8,050 kg/m³.Full Answer >