stainless steel
Stainless steel (Inox, Stainless-Steel), in metallurgy, is usually containing 10% -30% chromium of a class of alloy steel in general. "Ferroalloy" with a chromium content of more than 10.5% by weight. The name stems from this kind of steel is not as easy as ordinary steel rust. Chromium and low carbon content, can show significant corrosion resistance and heat resistance, can also add nickel, molybdenum, titanium, aluminum, copper, nitrogen, sulfur, phosphorus and selenium, so that the surface will produce rust Oxide film, in order to improve the corrosion resistance and oxidation resistance of the special environment, and to give special properties, so as to protect the steel itself by the external environment of the air, especially oxygen, water, some acid and alkali oxidation corrosion. Most stainless steels are melted in an electric furnace or an oxygen top-blown converter (converter) and then refined in another steelmaking furnace, primarily to reduce carbon content. In the argon-oxygen decarburization process, a mixture of oxygen and argon is injected into the molten steel. The ratio of oxygen to argon is changed to reduce the carbon content to a controlled level by oxidizing carbon to carbon monoxide without causing expensive chromium oxidation and loss. Thus, cheaper raw materials such as high carbon ferrochrome can be used in the initial melting operation. ...