ARC 418 Lecture Notes - Lecture 1: Electric Arc, Fluorite, Patina
5 Apr 2017
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Document Summary
Produced from iron ore in blast surface. And wrought iron (iron that has been purified by beating it with a hammer) Air was blown into a vessel of molten iron to burn out the impurities. By these means, large amounts of iron could be made into steel in about 20 minutes. Structural properties resulting were vastly superior to cast iron. Any range alloys of iron that contains less than roughly 2 percent carbon. Contains less than 3/10 of 1 percent of carbon. Plus traces of beneficial elements such as manganese and silicon. And of detrimental impurities such as phosphorus, sulfur, oxygen, and nitrogen. Contains 2 to 4 percent carbon and greater quantities of impurities than steel. Contains even less carbon than most steel alloys. Too much carbon makes a hard but brittle metal (like cast iron) Too little produces a malleable weaker material (like wrought iron) Oxides of iron extracted from the earth in mineral form.
