About hardware knowledge introduction.
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Author:feite
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Published time: 2010-10-26
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About hardware knowledge introduction:
Fenghua hardware refers to the metal processing, casting tools with gold, silver, copper, iron, tin and other metals, used to fix things, processing things, decoration and so on.
1. Gold articles: objects cast with gold are usually jewelry, currency, tokens and the like, such as rings, necklaces, gold COINS (in ancient times), gold bars, etc. Some are also used to make celestial globe and other objects.The gold content of gold articles is measured by K, detailed as follows (the gold content is an approximate value, and the black body is the commonly used gold content) :
8 k = 33.33%
9 k = 37.49%
10 k = 41.66%
12 k = 50.00%
14 k = 58.32%
18 k = 75.00%
20 k = 83.32%
21 k = 87.49%
22 k = 91.65%
24 k = 99.99%
Silver: silver is called the sister of gold.Silver, on the other hand, conducts electricity and heat very well.Used to make electronic instruments and power generation equipment parts, such as silver core wire.
3 copper: copper is the emissary of human civilization, the ancients commonly used copper to make sacrificial vessels, modern system tools, as we all know, copper excellent conductivity, but copper is more than silver and cheaper than silver ore, copper is now often used to make wire core and some communication equipment, electronic equipment parts.
4. Iron parts: iron is widely used and abundant in the world: the world's proven iron ore reserves have exceeded more than 200 billion tons!There are two kinds of iron commonly used: hematite and magnetite.
5. Hematite: hematite is composed of ferric oxide, which is dark red or steel-gray. It is mainly used for casting iron nails, screws, nuts, hammer heads and machine parts.
6. Magnetite: magnetite is magnetic, also known as "magnet", "magnetite", magnetite application range is not as wide as hematite, but also useful, magnetite can be shaped into a magnet to identify objects.
7. Tin parts: tin is not widely used. Common tin parts include can caps, tin foil, etc.
8. Other fenghua hardware:
Antimony: mixed with lead to ma
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