Sponsor LinksContact us for sponsor link $10.00 per month.
About Us
| Articles
| Stainless steel casting manufacturer & Exporter. | | Date Added: August 16, 2010 10:02:13 PM |
| Stainless Steel is a metal alloy popular as a surface for sinks and appliances. Stainless steel is a great surface that doesn’t corrode or rust easily. Stainless steel is easy to sanitize and clean. It actually isn’t stain-proof; it simply stains less than other steel. Chemical residues, dirty water, and even hard water can leave stains and spots on stainless steel. It can also be dented and scratched fairly easily. Manufacturers are now offering new types of finishes that diminish scratching and fingerprints.
Definition:-Steel casting is a specialized form of casting involving various types of steel. Steel castings are used when cast iron cannot deliver enough strength or shock resistance.
Examples of items that are steel castings include: hydroelectric turbine wheels, forging presses, gears, railroad truck frames, valve bodies, pump casings, mining machinery, marine equipment, and engine casting.
The three main types of stainless steels are austenitic, ferrites, and martens tic. These three types of steels are identified by their microstructure or predominant crystal phase.
Description:-Steel is a metal alloy whose major component is iron, with carbon being the primary alloying material. Carbon acts as a hardening agent, preventing iron atoms, which are naturally arranged in a lattice, from sliding past one another. Varying the amount of carbon and its distribution in the alloy controls the qualities of the resulting steel. Steel with increased carbon content can be made harder and stronger than iron, but is also more brittle. One classical definition is that steels are iron-carbon alloys with up to 5.1 percent carbon; ironically, alloys with higher carbon content than this are known as iron.
Currently there are several classes of steels in which carbon is replaced with other alloying materials, and carbon, if present, is undesired. A more recent definition is that steels are iron-based alloys that can be plastically formed (pounded, rolled, etc.).
Iron, like most metals, is not found in the Earth’s crust in a native state. Since the rise of the cyan bacteria and their excretion of oxygen into the atmosphere, iron can be found only in oxide form, typically Fe2O3— the form of iron oxide found as the mineral hematite. Iron oxide is soft sandstone -like material with limited uses on its own. Iron is extracted from ore by removing the oxygen by combining it with a preferred chemical partner such as carbon. This process, known as smelting, was first applied to metals with lower melting points. Copper and tin both melt at just over 1000 °C , temperatures that could be reached with ancient methods that have been in use for at least 6000 years (since the Bronze Age). Since the oxidation rate itself increases rapidly beyond 800 °C, it is important that smelting take place in a fairly oxygen-free environment. Unlike copper and tin, liquid iron dissolves carbon quite readily, so that smelting results in an alloy containing too much carbon to be called steel.
Types of steel
Alloy steels were known from antiquity, being nickel-rich iron from meteorites, and hot-worked into useful items. Damascus blades, famous as the blades that the Saracens wielded against the crusaders, were probably smelted iron wire, mated wire obtained from meteorites, heated and worked to impart the properties of expensive "star metal" to cheaper wrought iron; an early attempt at alloying.
In a modern sense, alloy steels have been made since the advent of furnaces capable of melting iron, into which other metals may be thrown and mixed.
Carbon steel
Damascus steel, which was famous in ancient times for its flexibility, was created from a number of different materials (some only in traces), essentially a complicated alloy with iron as main component.
Stainless steels and surgical stainless steels contain a minimum of 10.5% chromium, often combined with nickel, and resist corrosion (rust). Some stainless steels are non-magnetic.
Tool steels
HSLA Steel (High Strength, Low Alloy)
Ferrous super alloys
Production methods
Crucible technique or puddling - the original steel making technique, developed in India as wootz, used in the Middle East as Damascus and independently redeveloped in Sheffield by Benjamin Huntsman in 1740, and Pavel Anosov in Russia in 1837.
Bessemer process, the first commercial scale steel production process
Open hearth furnace
Basic oxygen steelmaking
Electric arc furnace a form of secondary steelmaking from scrap, though the process can also use direct-reduced iron…cast iron. |
|
