Colored black, heavy, precious and other metals, as well as their alloys are widely used in industry, agriculture, high-tech and specialized industries. More information about the various metals can be found on the pages https://metallsmaster.ru/metally-i-vse-o-metallax/.
In ancient times
Mankind has long been familiar with metals and alloys. Suffice it to recall from history that civilization, before reaching the current level, passed difficult way of development in copper age, bronze and other. This suggests that people learned to work metals long before the invention of industrial production methods.
In ancient treatises can be found description metals and mining methods, when smelted tools, arrowheads, including from meteorite iron. In that distant era, people had no idea how there are different metals, relative to:
- Hardness;
- Density;
- melting point;
- thermal Conductivity
- Conductivity.
- Gold;
- Antimony and mercury;
- Tungsten-molybdenum;
- Iron:
- Copper-Nickel;
- Tin;
- Copper.
Gradually, mankind developed. New technology the manufacture of various alloys.
provision of iron
Description metals, the processing of iron found in different sources. In the first Millennium BC smelted wrought iron. Weapons and tools were made in 1200 BC In the 7th century BC in the Caucasus, Anatolia, and India were built syrodutny furnace to produce iron from ore. Mankind gradually passed from era to era and reached the iron age, which lasted until 340 BC.
the First step to ferrous metallurgy was made when they managed to get iron by the method of recovery of the oxide. In the oven were laid charcoal and bog ore. Under the influence of high temperature and atmospheric oxygen and the oxygen atoms of iron – after the depletion of elements remained Kritsa. Then came the work of removing the slag.
Steel and ore
Steel was obtained from a ready iron by the method of saturation with carbon. Steel tools were widely distributed in Turkey, India. They were made mostly from steel. In Western Europe in late Antiquity, steel was produced in large quantity. In the middle ages it was used for the manufacture of stabbing, cutting weapon.
In modern times metal ores are necessary for the production of metals and alloys. Extract:
These ore not all of which occur in nature.
