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.Continue Reading
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
Stainless steel does not tarnish. It does not oxidize as well. Stainless steel has become more popular in body jewelry due to its hypo-allergenic finish and non-reactive surface.Full Answer >
In conditions where moisture and atmospheric conditions are normal, stainless steel does not rust, but when conditions are more extreme, corrosion may occur. Stainless steel is much more resistant to corrosion than regular alloy steels. However this does not mean there are not conditions under which it rusts.Full Answer >
A diamond's value is determined by cut, color, clarity and carat weight, so the mounting's metal, such as white or yellow gold, may influence the color and appearance of the stone, but not its value. Diamonds are graded and valued before mounting.Full Answer >
To clean simple imperfections in pewter, gently wash the metal with a mild detergent, warm water and a cloth. To thoroughly clean and polish pewter, use a homemade salt, vinegar and flour paste for cleansing and a rotten stone and linseed oil paste for polishing.Full Answer >