文档介绍：How the Steel was Tempered
Name:
How the Steel was Tempered
So steel is the most widely used metal materials in our daily life.
of iron storage capacity is very large, second only to Aluminium;
2. Steel has a good physical, mechanical and process performance;
3. Steel has  the characteristics of large production scale、high efficiency, good quality and low cost;
4. The steel has good recyclability.
Advantages of steel :
Steel is the most widely used metal materials in our life
China Liaoning Aircraft Carrier Ship
Nanjing Yangtze River Bridge
Stainless steel vacuum cup
Nanjing University of Science and Technology Gymnasium
How the Steel was Tempered
Two steps
Ironmaking
Steelmaking
What is the main difference
between iron and steel ?
The main difference between iron and steel
Both of iron and steel are alloy . The main difference between iron and steel is carbon content . The carbon content of iron is less than 2% , while steel is more than 2%. In addition , the material performance of steel is better than iron.
The main raw material of ironmaking
Iron ore
Including hematite , ite , limonite , and siderite .
Providing iron
coke
Providing energy
Providing a reducing agent
Stocking column skeleton
limestone
Removing the impurity in the iron
Iron and steel smelting process
Ore dressing
sintering
coking
blast furnace
ironmaking
Electric furnace
converter
steelmaking
rolling
Continuous casting
Iron ore
coke
limestone
Steel billet
molding
Thanks for listening!
End
The main raw material of ironmaking
The ponents of the hematite is ferric oxide(Fe2O3), theory of iron content ranging from 50% to 60%,being a good raw material for ironmaking.
The main raw material of ironmaking
The ponents of the ite is ferroferric oxide(Fe3O4) , iron content being about 70%, but it contains more harmful impurities such as sulfur and phosphorus .