history
From 6.5438 million years ago, primitive people used stones as tools, which was called the Paleolithic Age. 65,438+0,000 years ago, human beings processed stone tools and turned them into utensils and exquisite tools, thus entering the Neolithic Age.
Archaeological excavations now prove that China has made practical pottery more than 8,000 years ago, smelted brass more than 6,000 years ago, had simple bronze tools more than 4,000 years ago, and made weapons from meteorites more than 3,000 years ago. Our ancestors were able to smelt pig iron in the Spring and Autumn Period more than 2,500 years ago, 1800 years earlier than Europe.
/kloc-in the 0/8th century, the development of iron and steel industry became an important content and material basis of industrial revolution. /kloc-in the middle of the 0/9th century, the appearance of modern open-hearth furnace and converter nickel tube steelmaking technology made mankind really enter the steel age. At the same time, copper, lead and zinc have been widely used, and metals such as aluminum, magnesium and titanium have come out and been applied. Today, metal materials have always occupied a dominant position in the materials industry.