Steel History and Manufacturing : How It’s Done Now

Views:
 
     
 

Presentation Description

http://www.metalsupplies.com/mild-steel-plates.html

Comments

Presentation Transcript

Steel History and Manufacturing : How It’s Done Now:

Steel History and Manufacturing : How It’s Done Now

PowerPoint Presentation:

T he railroads were instrumental in creating a demand for large quantities of cheaply made steel. At first, railroad tracks were made of wrought iron, which was too malleable to withstand the stress of railroad use. In some cases, replacement of wrought iron rails was necessary ever 6 – 8 weeks. This was far from efficient or cost-effective. Until 1856, the production of steel was too expensive and slow for such large projects.

PowerPoint Presentation:

B efore the Bessemer converter was invented, most steel was produced using thecementation method. Wrought iron bars were tightly packed in charcoal powder, inside stone boxes. The boxes were heated for several days, allowing the wrought iron to absorb carbon from the charcoal powder. Then, the higher carbon bars would be broken up, repacked with more charcoal powder and heated again. The new blister steel was then hammered to improve the consistency of the texture.

PowerPoint Presentation:

C rucible steel was developed by Benjamin Huntsman in the 1740’s. Huntsman realized that he could produce a higher quality steel by melting blister steel in clay crucibles and adding a specialised flux to remove what slag was left after the cementation process. This method of steel production was costly, however.

PowerPoint Presentation:

I n 1856, Sir Henry Bessemer created a converter that used oxygen to remove unwanted carbon from pig iron, which had enough carbon to make it brittle. The Bessemer process was eventually refined with the addition of spiegeleisen , an iron, carbon and manganese compound. In today’s steel manufacturing industry, two types of steelmaking are employed. Primary steel manufacturing uses new iron, while secondary steel manufacturing recycles scrap steel.

PowerPoint Presentation:

I n primary steelmaking, iron ore is smelted to produce pig iron. Next, the pig iron is subjected to the Oxygen Converter Process, also known as Linz- Donawitz - Verfahren steel manufacturing. Oxygen is forced through the still-molten pig iron, absorbing and removing some of the carbon as it goes. This is how mild steel is made. This low-carbon mild steel has many uses, due to its inexpensive manufacturing and high degree of malleability.

PowerPoint Presentation:

D epending on what it will be used for, steel may undergo further heat treatment after its initial creation. The various methods of heat treatment affect the steel differently.Normalising makes the steel stronger, quenching hardens it further andspheroidising softens high carbon steels. Sometimes, elements are added to the steel in order to alter its physical attributes. Commonly added elements include nickel, chromium or vanadium.

PowerPoint Presentation:

A fter manufacturing, steel is fashioned into sections, ready for distribution. These sections are referred to as steel merchant bars and are available in a variety of shapes. Mild steel plate, mild steel sheet and mild steel tube are a few of the forms newly manufactured steel can take. The steel industry has advanced enormously in the last two centuries or so. Today, it is possible to produce mild steel in nearly any configuration to serve the virtually endless list of uses for this versatile alloy.

PowerPoint Presentation:

For More Information http://www.metalsupplies.com/

authorStream Live Help