Iron and Steel
Iron and Steel
Coating Steel With a Layer of Diamond (ScienceDaily.com)
"A surface treatment of steel with boron was also found to result in a good intermediate layer, even on stainless steel. An advantage of this treatment is that the difference in expansion between diamond and steel is gradually dissipated. After the production of diamond at about 600 oC, the steel contracts much more than the diamond coating and the coating can become detached as a result of this. A treatment with boron gives the external surface of the steel an expansion coefficient more or less comparable to that of diamond. This effect gradually decreases from the surface of the steel inwards." 02-08
How Steel Is Made (ScienceDaily.com)
"Steel was invented in 1856 by a British man named Henry Bessemer, who founded his own steel mill in Sheffield, England. Steel is still produced using the same basic technology: blowing air through molten pig iron to oxidize the metal and separate impurities."
"How hard steel is depends on the how much carbon is inside. For instance, the steel used to manufacture a pair of scissors contains almost 20 times as much carbon as the steel used in a soda can. But no steel contains more then 1.5 percent carbon. Heat can also affect steel's properties. If you cool a red-hot piece of steel very quickly in cold water, it will become harder and more brittle. The same piece of metal could be made softer by keeping it a high heat for a longer period of time and then cooling it slowly." 02-08
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